Roofing on a country house is a decisive moment in its construction. Qualitatively arranged, it can extend the life cycle of a building up to 50 years or more, and manufacturing errors can negate all efforts and investments. The most reliable and easy to manufacture are corrugated roofs.

Roof construction from corrugated board

The basis of the roof structure is the truss system. It is on it that a roofing pie is formed, which performs the following functions:

1. Protecting the building from rain and wind.
2. Saving heat in the under-roof space. According to experts, they can be up to 20-25% of the heating received from the heating system. The costs incurred during roof insulation are quickly offset by energy savings.
3. The possibility of using the insulated under-roof space for organizing additional attic-type living space.

To realize the tasks set, a roofing pie is created from several layers of various materials.

When installing a roofing pie, it is important to ensure that there is a ventilation gap between the waterproofing film and the roofing

crate

It serves as a supporting surface for the finishing coating of the roof. To ensure air circulation in the under-roof space, a counter-lattice is stuffed along the rafter legs, creating a ventilation gap between the rafters and the roofing.

Most often, the material for the crate is a board measuring 25x100 mm, edged or unedged. When installing unedged wood, it must first be sanded. You should be careful not to use a wider board, because when the temperature and humidity in the under-roof space change, it warps. The result may be swelling of the roof finish and damage to the adjacent layers of the roofing cake.

Under the decking from the profiled sheet, the crate is stuffed with different spacing of the boards, depending on the slope of the slopes:

1. On roofs with a slope of up to 10 degrees, a gap between the boards of up to 5 cm is allowed.
2. On slopes up to 30 degrees, the gap can be up to 45 cm.
3. Roof slopes of 45 degrees or more make it possible to make a sheathing step equal to 60–70 cm.

2-3 upper boards of each slope under the ridge space are installed closely.

The lathing is stuffed on top of the waterproofing film, reinforced on the rafters by the planks of the counter-lattice. The distance between the boards is set using special spacers made from wood trimming. The fastening of the batten to the planks of the counter batten is carried out with two nails at each intersection. This method of fixing increases the strength of the truss system.

The crate is mounted on top of the hydroprotection and the counter-crate, fixing it at each intersection with two nails.

counter grating

As mentioned above, this roof element creates an air gap between the roof finish and the waterproofing film. If this condition is not met, the condensate remains under the roofing material, impregnates the wooden parts, contributing to the development of fungal infections and rotting of the wood. In this case, soon after the installation of the roof, urgent repairs may be needed with a complete replacement of the truss system of the house.

Before installing the counter-lattice on the rafter, you need to stretch the moisture-proof film. The elements of the counter-lattice are stuffed onto each rafter leg over the film. For it, bars with a size of 25x50 mm are used, and with a large roof plane - 40x50 mm. There is no need to use large-sized material, this leads to a heavier structure and an increase in financial costs. In addition to creating a ventilation gap, the installation of a counter-lattice makes it easier for workers to move along the roof and evenly, without distortions, stretch the moisture-proof film.

The counter-lattice is laid in horizontal rows and attached to the rafter legs, firmly fixing the waterproofing film.

The bars of the counter-lattice are attached to the rafter legs with nails at least 70 mm long in increments of about 20 cm. It is allowed to leave gaps between the individual bars, depending on the type of finish. The counter-lattice can be installed on any insulating materials, including membranes, roofing felt, etc. It is suitable for all types of finishing coatings, including corrugated board, ondulin, metal tiles, etc.

Video: crate for corrugated board

Waterproofing

The purpose of the roof is to protect the internal space of the building from the effects of adverse environmental factors. One of them is water that falls in the form of precipitation and comes as condensate from the finish coat. This problem is solved not only by the selection of high-quality roofing material, but also by the installation of a waterproofing layer in the roofing pie.

For this, various types of materials are used:

1. Roll. These include the well-known roofing material, as well as a number of modern products of this type.
2. Coating. These materials are represented by various types of bituminous mastics.
3. Film. The most common type of waterproofing materials, especially in individual construction. The attractive side is the low price in comparison with other products of similar purpose.
4. Diffusion. Relatively new and most expensive material. The difference is the ability to pass moisture only in one direction, which allows the roofing cake to dry out during operation.

Roll waterproofing

The construction market is represented by a variety of types:

The main advantages of roll insulation include:

1. Low cost.
2. High reliability.
3. Sufficient durability. The service life of such material is up to 15 years. In places of wear, it does not need to be dismantled; it is enough to lay several layers of a new coating on top of the old roof.

The disadvantage of roofing material is the relative complexity of installation associated with the use of bituminous mastic. But if you use euro- or glass roofing material, this need is no longer necessary, you just need to heat the lower surface of the material with a gas burner. The result is a reliable fastening to the roof, which completely eliminates the possibility of leaks.

Mastic for roof insulation

Mastics are used to insulate flat roofs and gentle slopes. Their popularity is due to the following reasons:

Along with a lot of advantages, this material has one significant drawback - fragility. The maximum service life is five to six years. Then the surface begins to swell and crack.

Film insulating materials

These are the most popular means for waterproofing, primarily because of the low cost and ease of installation. The most commonly used polyethylene film with a thickness of 200 microns. It is laid in strips with an overlap of 12–15 centimeters. The junction is additionally glued with adhesive tape. On sale there are films with a sticky edge at the docking point. They are easier to install, but cost a little more.

Films with an anti-condensation layer on the reverse side are also produced. This layer is able to retain moisture on itself, so that it does not enter the insulation.

Photo gallery: film materials for waterproofing

To install inexpensive waterproofing, a conventional polyethylene film is used. The film must be laid with a slight sag in order to compensate for possible linear expansions during operation. The waterproofing membrane "Ondutis" can serve as an independent roof covering for several months Polyethylene building films often have a rubberized base and are excellent at retaining moisture.

Diffusion materials

This is a new material in the market of waterproofing products. Its peculiarity is that it passes moisture in only one direction. The installation of such a film on the inside of the roofing cake is carried out to constantly dry it from accidentally getting moisture.

There are three main types of films with one-sided permeability:

Vapor barrier materials

Installing a vapor barrier when forming a roofing pie is vital. If the waterproofing layers of the roof are designed to protect the house from the penetration of water from the outside, then the vapor barrier protects the insulation from moisture from the inside of the building. Its accumulation inside the insulating layer quickly disables the wooden structures of the truss system, anticipating an early overhaul of the roof.

The vapor barrier must be placed below the insulation of the roofing pie, this makes it possible to intercept steam from the room, preventing it from entering the roof. If the roof is not insulated, a vapor barrier is still necessary, otherwise the living conditions in the house may be equal to those in the greenhouse.

The vapor barrier film protects the roofing pie from moisture coming from inside the room.

Most often, various films based on polyethylene are used for this purpose. They can be waterproofing, vapor barrier or antioxidant. The peculiarity of the latter is that one side is covered with a fleecy fabric that actively absorbs water, preventing it from getting on the insulation.

Previously, parchment was used for vapor barrier, but new materials on other bases are significantly superior to it.

Depending on the physical and technical parameters, there are three main types of materials for vapor barrier:

Roof insulation

The need for thermal insulation is associated with large heat losses in the under-roof space of an uninsulated roof. According to experts, it can be up to 30% of the total amount of heat generated by thermal units. Given the long heating period in most of the country, the losses are very significant. Therefore, the cost of roof insulation will pay off quickly.

According to what indicators to choose the best insulation:

1. Durability - stable operation of the insulation layer during the maximum life of the building.
2. Fire safety and water resistance.
3. Environmental safety - during operation, the insulation should not emit hazardous fumes or solid particles into the atmosphere.
4. Sufficient density, low specific gravity and shape stability under the roof.
5. soundproofing properties.
6. effective thickness.
7. Stability when exposed to low temperatures.

When choosing an insulating material for a pitched roof, attention should be paid to the following points:

The technology for installing a heater is as follows:

1. Lay a layer of waterproofing.
2. Measure and cut the insulation for laying between the rafters. At the same time, it must be remembered that it must be tightly, without gaps, placed in the opening. It is important to arrange a gap between the insulation layer and the waterproofing of at least 20 millimeters.
3. Lay the insulation in the direction from the bottom up.

   The insulation must be laid tightly between the rafters, the joints between the plates must be overlapped with a layer located on top

4. When placing insulating materials, their sagging should be avoided. Gaps between fragments are undesirable. However, it should be borne in mind that during operation, the insulating layer tends to increase in volume.
5. Install vapor barrier. It should be controlled that its front side is directed into the room. Then the moisture from the roofing cake will be brought out.

   The vapor barrier membrane is laid from the side of the room and fixed with a stapler to the rafters

6. Fix the vapor barrier film to the beams with a stapler, glue the joints with adhesive tape.
7. Install the bars on top of the vapor barrier film, which will serve as the basis for finishing the surfaces.

Video: pitched roof insulation

profiled sheet

For the device of the finishing coating of the roof, corrugated board is increasingly being used. This is due to its excellent strength characteristics, a large selection of colors and shades, simple installation technology and affordability of the material.

A more complete list of the advantages of this material can be presented as follows:

1. Ecological purity.
2. The widest palette of color schemes of the coating, which allows you to choose a harmonious combination with other structures on the site.
3. A wide range of protective coatings for any operating conditions.
4. Affordable cost.
5. The ability to order the material strictly in accordance with the lengths of the slopes in order to produce a seamless roof.

The choice of a specific type of profiled sheet depends on the angle of inclination of the slopes. The material must be able to drain water during summer rains and spring snowmelt, as well as withstand snow loads in winter. The vertical overlap of the sheets also depends on the angle of inclination - the smaller the angle, the greater the overlap.

For example:

• at an angle of inclination up to 10 degrees, the overlap should be at least 300 mm;
• on slopes with a slope of 10–15 degrees, the overlap is from 200 mm;
• with slopes of 15–30 degrees, an overlap of 170–200 mm is allowed;

Different brands of corrugated board differ in strength, wave height and material thickness

When choosing corrugated roofing, first of all, you need to pay attention to the labeling of products:

1. The letter "H" denotes a sheet used for roofs or floors.
2. The designation "NS" indicates the universal nature of the profile. It can be used for roofing and wall finishing, as well as for the construction of site fencing.
3. Marking "C2" is provided with a profiled sheet intended exclusively for wall coverings.

It is important to understand that the strength of the sheet depends on its thickness and profile height. The profiled sheet is produced with a corrugation height from 10 to 114 mm from metal with a thickness of 0.4–1.0 mm.

Fastening sheets of corrugated board

Sheets of corrugated board are attached to the crate with self-tapping roofing screws. Their installation is carried out both on the crest of the corrugation and in the depression, closely adjacent to the crate. The lower fastening is made with self-tapping screws up to 30 millimeters long, the screw length for the upper fastening consists of the profile height plus 30–40 millimeters. The lower fastening is made in the depression following the overlap. A washer and an elastic gasket are installed under the hex head of the screw, blocking the flow of moisture into the under-roof space.

The number of attachment points depends on the pitch of the crate - one screw per board.

Video: installation of corrugated roofing

The process of creating a roof from corrugated board is simple and straightforward. There are enough materials in the construction markets both in quantity and quality. You need to find the determination in yourself, take it and do it yourself. I wish you success!

The material of this article was prepared by experts from the construction information portals site and glover.ru. Here we will try to give the most complete information about the types and properties of steel profiled flooring, as well as how to install a roof from corrugated board with your own hands.

Steel profiled decking is a material that is successfully used in construction for roofing, wall cladding, sandwich panels, fixed formwork for concrete foundations, walls and ceilings, as well as a material for fences and fences, and in many other structures.

Decking is made according to the requirements GOST 24045-2010 "Bent steel sheet profiles with trapezoidal corrugations for construction" from thin galvanized steel sheet, which is given a corrugated appearance during production for increased rigidity and strength.

Cross section of profiled sheet

B - mounting width of the profile; h - profile height; t - profile thickness;
S - corrugation pitch; a and b - the width of the profile shelves (maybe a = b);
a1 and a2 - the width of the extreme flanges of the profile corrugations (the difference between them must be at least 2 mm)

In order to provide additional protection against external influences and prevent corrosion, the galvanized profiled sheet is coated with special paints or polymer compositions of different colors, which also increase the aesthetic qualities of this material.

To increase rigidity and improve consumer properties, the profiled sheet can additionally be equipped with stampings of the following type:

Steel profiled sheet is divided into several types, indicated by marking:

• C - which means "wall", is used for the manufacture of sandwich panels, wall cladding and fences;
• H - "bearing", used as a fixed formwork when installing reinforced concrete floors and roofing;
• NS - universal products suitable for the installation of both enclosing wall structures, and for floors and roofs.

In addition to the letter designation, the marking includes numbers that have their own meaning. For example, the brand H-60-0.7-845-6000 means that this is a bearing corrugated board with a corrugation height of 60 mm, a steel thickness of 0.7 mm, an assembly width of the product of 845 mm and a length of 6 m.

The total and mounting width of the profiled sheet

The installation width is less than the actual width of the product, since the sheets of corrugated board are laid with an overlap, and is equal to the size between the middle of the shelves located along the edges of the sheet. The height of the corrugations can be from 20 to 160 mm for corrugated board used as a carrier, and from 8 to 135 mm for products used as wall fencing.

Advantages of steel profiled sheet

Steel profiled sheet has the following advantages over other types of roofing in the case when the roof is made of corrugated board with your own hands:

• high strength and resistance to any external influences: atmospheric factors - rain, snow and hail, ultraviolet solar radiation, mechanical influences;
• low weight - up to 10 kg / m², which does not require the construction of a powerful roof truss system, such as for a roof made of natural or cement-sand tiles;
• a wide range of types and colors - this allows you to choose the coating material in accordance with any architectural design of the facades of the building;
• durability - the service life of a corrugated board coating reaches 50 years or more;
• ease of installation, in which the roof can be covered with corrugated board with your own hands without much difficulty with the help of easy-to-use tools;
• low cost compared to similar quality metal tiles and other metal materials with small differences in aesthetic qualities and performance characteristics.

Material selection

In order to make a roofing device from corrugated board with your own hands, you need to choose the right material that meets the following conditions:

• profiled steel sheet must be grade H or HC, under certain conditions it is possible to use grade C corrugated board;
• profiled sheet must be at least 0.5 mm thick;
• the height of the corrugation is selected within 20-75 mm;
• products must be with a drainage capillary groove along the edge.

Before starting work, during the production of which the roof of the roof is covered with a professional sheet with your own hands, it is necessary to correctly calculate the amount of material in order to prevent unnecessary overspending. It is easy to independently calculate the required amount of material only in the case of a gable roof. If the roof has a more complex shape - hip, tent, gable, etc., then such a task will be problematic.

Composite decking roof

Most corrugated board suppliers, when ordering, can calculate the required amount of material using special programs or calculators in the most rational way, optimizing consumption and taking into account the use of corrugated sheet trimmings as much as possible.

To do this, it is necessary to provide the supplier with a roofing scheme in several projections with the layout of all slopes and slopes, including the dimensions of the cornice overhangs, the configuration of ridges, valleys and various junctions. At the same time, the supplier must calculate the required amount of profiled sheet with additional elements that do-it-yourself corrugated roofing needs, including strips for covering ridges, valleys and cornice overhangs, gutters and pipes, snow retention devices.

Roofing technology with a profiled sheet

Do-it-yourself roofing with corrugated board consists in sequentially performing the following operations:

• rafter system devices with a crate for supporting profiled sheets;
• laying profiled steel sheets and fastening them with self-tapping screws to the crate;
• junction devices on roof fractures - ridges and valleys, as well as cornices.

When performing work on the installation of roofing from corrugated board, you can use the technical document: "Typical technological map (TTK)" Arrangement of roofs from metal tiles ", which gives instructions for covering roofs made of metal tiles and profiled sheets.

To install a roof from a profiled sheet with your own hands, you will need the following set of tools and fasteners:

• electric saw for metal and manual cutting shears for cutting sheets of corrugated board to the required size;
• a screwdriver for fastening the profiled sheet to the crate of the truss system or a drill equipped with a reverse stroke and adjustable rotation speed;
• tape measure and marker for marking;
• roofing self-tapping screws with washers and sealing polymer gaskets supplied with corrugated board;
• hammer, hand saw with fine teeth, screwdriver.

Rafter system and lathing for profiled sheeting

The roof rafter system is a load-bearing frame consisting of racks, girders, rafters and battens. A detailed analysis of the device of the truss system requires consideration in a separate article, so here we will limit ourselves to the information necessary for the correct installation of a corrugated roof.

1 - corrugated board coating;

2 - crate made of timber or boards;

3 - counter crate;

4 - waterproofing vapor-permeable membrane;

5 - vapor barrier film;

6 - sheathing with plasterboard sheets;

7 - load-bearing rafters;

8 - crate under the rafters for fastening the inner lining;

9 - heat-insulating mats;

10 - the second layer of thermal insulation if necessary.

As can be seen from the diagram, the corrugated board is attached to the crate, which can be made of a bar with a minimum section of 40x40 mm or a flat board of 32x100 mm. Of great importance is the installation of a waterproofing membrane and a counter-batten, which is a wooden beam with a section of 32x50 mm, fastened over and along the rafters and pressing the waterproofing membrane. This design creates an air gap between the bottom surface of the roof covering for ventilation and removal of condensate that forms on the corrugated board due to temperature differences. Moisture removal occurs due to air circulation and through the capillary grooves present on the edges of each profiled sheet.

From the inside, the truss system for the attic is sheathed with plasterboard sheets, detailed information on working with which you can get from our articles on the Glaver.ru portal: “Working with drywall: step-by-step instructions for sheathing and leveling walls with drywall, installing partitions from plasterboard on a frame and without a frame ».

On top of the rafters and the counter-battens, the main crate is stuffed, on which sheets of corrugated board are attached. In the table below, we indicate the pitch of the lathing, depending on the slope of the roof slopes and the brand of corrugated board for the three types of profiled sheet most commonly used for roofing.

Lathing step selection table for the most popular grades of profiled sheets

Profiled brand	Thickness of corrugated board, mm	Rafter step	Lathing section, mm	Lathing pitch, mm
				Roof pitch 30°	Roof pitch 45°
HC-20	0,55	600-900 mm	50x50 or 32x100	400	600
	0,75			500	700
HC-35	0,55			1000	1000
	0,75			1200	1300
C-44	0,55			900	1500
	0,75			1100	1400

Installation of profiled sheets must begin from the lower left edge of the roof slope. The first sheet is laid taking into account the cornice protrusion and the overhang over the edge of the gable in the case of a gable roof, and is temporarily attached to the crate with one self-tapping screw in the upper part. Then the second, third and fourth sheets are laid with an overlap in one wave along the edge and each sheet is also temporarily fixed with one self-tapping screw. After that, all sheets are aligned along the edge of the cornice and along the end of the roof and are finally fastened with self-tapping screws to the crate.

If the length of the sheet is not enough to cover the slope, then the corrugated board is laid with a horizontal overlap of 150-300 mm. In the case when the roof slope is small - less than 15 degrees, horizontal and vertical joints must be additionally sealed with a special elastic roofing sealant.

If the slope has a triangular or trapezoidal shape, then the first sheet should be laid in the middle of the slope, and then continue installation in both directions.

Cutting the profiled sheet to size should only be done with an electric hacksaw, electric jigsaw or metal shears, after which the cut edges must be treated with an anti-corrosion primer, since this operation damages the protective coating, which can cause accelerated corrosion in the future. It is impossible to cut sheets with a “grinder”, when working with which significant damage is caused to the factory anti-corrosion protection of the edges.

To fasten metal profile sheets, special self-tapping screws are used complete with washers and gaskets made of neoprene rubber (elastomer), which vulcanizes when the screws are tightened, expanding and sealing the junction. Gaskets made of this material guarantee complete tightness, preventing moisture from passing under the coating. For fixing one sheet of corrugated board, 8-10 self-tapping screws are required with a step equal to the step of the crate. The heads of the self-tapping screws supplied with the base material are painted in different colors corresponding to the color of the profiled sheet.

At the request of the customer, profiled sheets can be laid using polyurethane foam sealing elements, also included in the scope of supply. You can learn more about polyurethane foam from the article " We reveal the secrets of polyurethane foam as a heat insulator for walls, we study its advantages and disadvantages". This solution reduces the noise of the roof when exposed to precipitation and increases its thermal insulation properties. The seal is a set of gaskets placed between the crate and the roofing. The cross section of the gaskets supplied with a certain type of material coincides with the transverse profile of the metal sheets.

Gaskets for profiled sheets

After installation of all corrugated roofing sheets, it is necessary to equip cornice overhangs, ridges and valleys, since these places are the most vulnerable to the penetration of atmospheric moisture under the roofing.

Arrangement schemes for adjoining and roof fractures

In places where the roof breaks - on ridges and valleys, junctions with walls - additional bars or battens are installed, and then additional elements that are supplied with the profiled sheet - adjoining strips and valleys, ventilated ridges.

On skates, a ventilation gap must be provided to ensure unhindered air circulation from the under-roof space. Bent ridge strips are fastened with self-tapping screws through the upper parts of the profiled sheets, which are mounted with a gap of about 50 mm between them. The ridge strip overlaps the joint of profiled sheets by about 100 mm in each direction.

The scheme of sealing the roof ridge from corrugated board

When arranging the ridge, a sealant is used, which fills the corrugations at the junction of the ridge bar by about 2/3 of the height, so that there is space for air circulation.

Another important element of the roof is the cornice overhang, which serves to discharge water; air also enters through it into the under-roof ventilation gap, which is removed through the ridge assembly.

1 - corrugated board; 2 - bent cornice element; 3 - frontal bar;4 - rafter; 5 - cornice plank; 6 - fastening elements of the skin.

Bibliography:

• GOST 24045-2010 "Bent steel sheet profiles with trapezoidal corrugations for construction";
• SP 17.13330.2011 “Roofs. Updated version of SNiP II-26-76";
• Typical technological map (TTK) "Arrangement of roofs from metal tiles";
• SNiP 2.03.II-85 "Protection of building structures against corrosion";
• SNiP 2.01.07-85* "Loads and impacts";
• A range of cold-formed galvanized steel profiles for construction. M, NAPSGP, 2002;
• "Guidelines for the use of profiled steel flooring in construction", TsNIIPSK them. Melnikov.

The device of a roof from a professional sheet on a wooden crate practically does not differ from a standard roofing pie. However, there are a number of nuances that are important to take into account when calculating the materials and steps of the crate. It is important to correctly determine the slope of the roof, correctly calculate the truss system, protect the wood and prevent moisture from entering the tree. Learn how to prepare for installation in advance to avoid irreparable mistakes.

Scheme of a roof from a profiled sheet

Restrictions on the use of profiled sheet for roofing

The professional flooring is widely used for roofing works in private and industrial construction. When choosing it, it is important to know a number of subtleties that will allow the roof to serve without current and major repairs for many years.

Installation of roofing from corrugated board on wood

A key factor to take into account is the existing or planned roof slope.

This is most relevant for latitudes with snowy winters. With a slope over 30? the wind load increases, especially on the outer sheets and along the ridge. But all these recommendations work only for those structures in which the building materials are correctly selected, and the installation is implemented without errors.

Important! The most economical option in terms of corrugated board consumption is a shed roof with a slope of about 10?. The steeper the slope, the greater the number of slopes and kinks in the roofing, the more expensive the purchase of building materials will be.

Roof with attic with corrugated board

The construction of a pitched roof made of corrugated board

For any roof, the supporting functions are performed by the truss system. The device of a roof from a professional sheet is globally no different from a structure for a roof covered with slate, shingles or other material. But the nuances appear already at the stage of installation of the crate.

Scheme of a roofing pie with insulation

Do-it-yourself crate for corrugated board is most often made of wooden beams or boards.

An economical option is a bar with a section of 40x40 mm or 50x50 mm. Boards for this case are best purchased with a section of 100x30 mm and thicker.

Wooden crate for corrugated board

A counter-lattice is often placed directly on the rafters. It serves to fasten waterproofing material and organize a ventilation gap, which reduces the likelihood of moisture vapor entering the building. An additional insulating layer, a vapor barrier film and a finishing facing material (for example, OSB) can be mounted below the waterproofing.

This whole “pie” is crowned with corrugated board on top, the fastening of which to the crate is carried out with special roofing screws. Their distinctive feature is the galvanized steel from which they are made. Complete with hardware are washers-seals made of neoprene rubber or silicone.

Preliminary calculations for the installation of corrugated roofing

Each construction project starts with the stage of design and purchase of building materials. And in order to buy everything you need in the right quantity at one time, the purchase must be preceded by a scrupulous calculation of building and consumable materials.

Selection and calculation of the amount of profiled sheet

Not all types of corrugated board are suitable for roofing; C21 and MP-20R grades are considered the most optimal. The most durable will be sheets coated with pural, plastoizol, PVDF. Galvanized profiled sheet without a polymer coating is suitable only for short-lived buildings - such a roof will soon require repair.

The volume of purchases of profiled sheets is determined by the size of the roof. But there are a number of nuances that will not only simplify installation and reduce the time spent on it, but also make the entire structure more reliable.

When purchasing corrugated board, it is better to contact the manufacturer directly. This will make it possible to order sheets of exactly the right length (up to 12 m) and avoid the appearance of unnecessary transverse joints on the roof plane. Six-meter sheets are considered standard, sold in building markets.

Characteristics of the roofing profiled sheet

The transverse size of the profiled sheet depends on its brand. For roofing types, it ranges from 800 to 120 mm. When calculating the estimated consumption, it must be remembered that part of the width will go to overlap, the purpose of which is to ensure the tightness of the junction of adjacent sheets. Usually we are talking about an overlap of 1-2 waves. And the stock of space in this situation will have to be reserved within 10-15%.

Overlapping adjacent sheets of corrugated board

Calculation of the material and step of the crate

As already mentioned, the crate under the profiled sheet can be assembled from timber or boards. Wooden crate can be solid or sparse.

Types of lathing for corrugated board

Material consumption depends on two factors:

• The first is the dimensions of the roof.
• The second - with what indents from one another the timber or boards will be mounted.

Having at your disposal the values ​​of these parameters, you can determine the total consumption of materials.

Which step of the lathing to take under the corrugated board depends on the thickness of the profiled sheet and the angle of the roof slope. With a smaller slope, the load on the crate will increase, and there will be a need to reduce the step:

• with a slope of up to 15 sq.m, the step of runs under the profiled sheet should be within 0.5 m (and when using boards, they can be set without gaps at all);
• at 15-35 sq.m, the step can be increased to 1.3 m;
• at angles over 35 sq.m, the step of the crate can be safely chosen more than 1 m.

Lathing step for different types of profiled sheets

There are grades of corrugated board with a large wave height and a steel thickness of 0.7-0.9 mm. They are characterized by high rigidity (for example, grades H-60 ​​or H-80). When choosing such brands for roofing, the distance between the crate for corrugated board with a slope of more than 35? is over 2 meters.

Before designing and calculating the crate, it is necessary to make a decision regarding the grade of the profiled sheet that will go into work. After all, the step of the crate and, accordingly, the consumption of material depend on this, which entails changes in the overall budget of the project.

For heavy loads, it is better to give preference to a two-layer crate. It is also necessary when using a thick layer of heat-insulating material. For a double crate, bars with a section of 50 * 50 mm are additionally laid across the rafters.

Important! The timber or boards must be chosen dried, and before starting the installation work, impregnate them with an antiseptic composition that extends the service life.

The steeper the slope, the greater the step of the crate

Installation of a roof from a professional sheet on a wooden crate

The installation technology of corrugated roofing is not difficult, but it requires careful adjustment of all parts and adherence to the sequence of installation of individual elements. Only in this case, the roof will be able to fully fulfill its assigned functions and last for many years without major repairs or partial replacement of some fragments.

Calculation of rafters - table

Stages of construction of the truss system and preparation of the crate

The sequence of actions during installation work includes several steps:

1. Installation of the truss system. It consists of vertical racks, inclined struts and rafter legs. The rafters are installed at a distance of 60 to 80 cm from each other.
2. After the installation of the rafters is completed, a waterproofing membrane is laid on them. To avoid displacement, it is fixed on the timber using a construction stapler.
3. Be sure to put a vapor barrier film on the rafters.
4. Next, you can proceed to the installation of the crate under the roofing corrugated board. This step should only be done in dry weather.
5. Fixing boards or timber is performed with self-tapping screws or nails. Always use two nails in one area.
6. First, mark the location of the bars on the rafters located at the edges. It is important that the attachment point is flat and smooth, if necessary, the site must be cut off or a rail filled on top (a piece of roofing material can be) to achieve the same level.
7. The laying of bars or boards for the construction of the crate starts from the ridge.

Lathing for corrugated board - scheme

1. Splicing of two pieces is carried out in the area of ​​the rafters by means of nails. The ends must be cut so that the joints in the horizontal rows are displaced. It is important that two adjacent rows are not spliced ​​on one leg.
2. The bottom board, located near the eaves, should be thicker than the rest.
3. At the ends, wind boards are necessarily provided, the height of which is equal to the height of the profile of the profiled sheet.

Roof ready for decking

If the roof has a chimney or other elements, they will require a separate crate. In the case of flue pipes, wooden parts must be at least 15 cm away from them.

Important! When laying a waterproofing membrane, overlap adjacent sheets by 10-15 cm to prevent water from flowing through the joints.

The order of laying the roofing profiled sheet

A corrugated board is laid on top of the resulting structure. Installation starts from one of the edges of the bottom row. If the profile of steel sheets has a capillary groove, it is more convenient to start work from the left corner. For fastening, special self-tapping screws with a rubber washer are used - fastener consumption is at least five pieces per square meter.

When laying corrugated board, one should not forget about the organization of the overhang of sheets along the lower cut and above the gables. This is useful for protecting vertical surfaces from rain and making it easier for natural rainfall to be drained through a gutter system. The generally accepted overhang size is 300-400 mm.

Roof framing device

Mounting tool kit

To assemble the truss frame, put the roof sheathing under the corrugated board and cover it all with a profiled sheet, you will need the following set of tools:

• screwdriver with a set of bits;
• electric drill;
• jigsaw;
• wood saw;
• set of drills;
• building level;
• roulette.

Tools for working with a profiled sheet

This is the minimum set of tools without which it is inconvenient to work. It is likely that in some situations it will be necessary to expand this list. After all, it may be necessary to cut the profiled sheet or edit the surface of the boards, for this a hacksaw and jointer will come in handy.

Important! It is strongly not recommended to cut corrugated board using a grinder due to local overheating of the protective coating of the sheet and the loss of its qualities.

Having dealt with the design of the roof, the arrangement of the lathing for corrugated board and the algorithm for mounting individual elements, you can start building the roof with your own hands. If the intended object is a simple shed roof near a canopy or gazebo, then there is no doubt about success. When building a residential building in the absence of experience, it is better to entrust the work to a professional.

Video: Professional sheet on a wooden crate

Such material as corrugated board has long been known to everyone and is used in construction in a variety of "roles" - they install fences from it, build garages and sheds, and also cover the roofs of outbuildings, small houses and even large mansions. Decking is produced in a variety of colors, so you can see houses covered not only with sheets of the same color, but also with a combination of shades. which looks very original.

To know how to properly cover the roof with corrugated board, you need to carefully study the instructions, and then purchase high-quality roofing and consumables, prepare all the necessary tools.

It is very important that you do not need to have special professional skills to cover the roof with this material. The main thing is to follow the technological sequence of work and not make mistakes that can lead to roof leakage, which will require bringing the coating to perfection.

Advantages and disadvantages of corrugated board as a roofing material

Like any roofing material, corrugated board has its pros and cons that you need to know before purchasing it.

TO positive qualities This material includes the following:

• The light weight of corrugated board allows you to easily lift it to a height and, if necessary, level it at the installation site.
• Optimum ratio of cost and service life of the material. With high-quality installation, the manufacturer sets a minimum operating period of 12 ÷ 15 years.
• Ease of installation - the material is easily overlapped and screwed with special self-tapping screws.
• Aesthetics of the coating - corrugated board, due to the variety of colors, makes the appearance of the house neat, gives it individuality.
• In the relief of most sheet models, special capillary grooves are provided, which are designed to effectively drain water when laying overlapping sheets of material.

negative qualities corrugated board can be called:

• High thermal conductivity of metal. Therefore, corrugated board will not protect the attic from overheating or low temperatures. If this coating is chosen, a good attic floor will be required, which implies additional costs for thermal insulation material and its installation.
• In windy weather, when the wind speed is 15 m / s and above, any metal coating emits ultrasonic vibrations that adversely affect the human psyche. Therefore, in regions with constant windy weather, it is better to give preference to roofing that does not vibrate in the wind.
• Low soundproofing. If the roof is not provided with heat and sound insulating material, the sounds of drops or hailstones falling on the floor will be clearly audible in the house.

Choice corrugated board for roofing

Decking can be made from galvanized metal sheets that do not have a color coating. Such sheets are most often used to create temporary or permanent sheds, or to cover outbuildings. It is also often used for building site fencing. Unpainted corrugated board has a fairly low cost, but is not very suitable for covering residential buildings, as it has low performance characteristics and is not very attractive in terms of aesthetics.

It is very popular, which has a decorative protective coating of polymer compositions. This material is more durable and able to withstand quite severe loads. Certainly this — with proper installation, which largely depends on the angle of the slope of the roof slopes.

Several types of corrugated board are produced with a protective and decorative polymer coating:

• Bearing (H) - designed to cover the roof, floors and canopies.
• Wall ( WITH) - used for the construction of a fence, hangars, garages.
• Universal (NS) - suitable for roofing, installing fences, building garages, utility facilities, etc.

It is better to use a carrier to cover the roof, but last resort any of the above types can be used.

In addition, this material varies in height and number of waves. The height of the wave (corrugations) is indicated by a number, which is placed next to the marking of the type of corrugated board. For example, several models are presented in table:

Marking	The appearance of the corrugated board	Application	Corrugation height in mm	Metal thickness in mm	Usable width in mm
C10		wall	10	0,5; 0,6; 0,7	1100
C18		wall	18	0,5; 0,6; 0,7; 0,8	1000
C21		wall	21	0,5; 0,6; 0,7; 0,8	1000
		Roofing Wall	35	0,5; 0,6; 0,7; 0,8	1000
C44		wall	44	0,5; 0,6; 0,7; 0,8; 0,9; 1,0	1000
H60		roofing	60	0,7; 0,8; 0,9; 1,0	845

A metal sheet of corrugated board can have a one-sided or two-sided coating, but no matter what it is purchased for, it is better to choose a material that is protected on both sides.

The coating consists of numerous protective layers, the diagram below clearly shows which layers cover the outer and inner side.

External side of the roofing material:

• The basis for corrugated board is a steel sheet.
• Steel is coated with zinc.
• Next comes the anti-corrosion coating.
• A primer layer is applied to it, which serves as a preparation for the polymer.
• Then comes the colored polymer coating.
• A protective film (polyurethane) is often applied to the color polymer coating, which will keep it from fading and peeling.
• For transportation and storage of corrugated board, it can be additionally covered with a film coating on top, which is removed after installation.

The inner side of the corrugated board is covered in the same sequence with exactly the same materials, but on some models there is no colored polymer film from the inside, while on others the sheet is covered equally on both sides. The latter, of course, have a higher cost, but their service life is much longer.

The color scale of a professional flooring is rather various. According to the most conservative estimates, the color range is represented by at least 30 shades, so choosing the right one will not be ore. The color layer on the surface can be applied by powder method or using a special polymer coating technology.

To summarize the selection criteria, we can list the following:

• To make sure that the material is of high quality and produced in professional conditions, you should ask the seller for a product certificate. If it is missing, then it is better to contact another store.
• The marking of the material is checked, indicating its purpose, thickness and wave height.
• The appearance of the material is evaluated. It is necessary to pay attention to the evenness of the sheet, the absence of defects in the coloring and protective layer, the same shade of all sheets, the uniformity of the coating. The appearance can tell a lot about the quality of the corrugated board - if during the inspection a peeling of the coloring layer or burrs on the sections are found, then it is better to refuse the purchase.
• Another criterion is to check the corrugated board for bending - high-quality material must be elastic, and if you try to bend it, it tends to return to its previous position. In this case, no trace of a fold should appear on the coating.
• Type of external decorative coating - polymer or powder. The highest quality corrugated board coatings are matte and plain polyester and plastisol. Coating data must also be stated on the product certificate.
• Material price. It must be remembered that you should not choose the cheapest material - it is unlikely to be of high quality. Moreover, all corrugated board has a very affordable price.

When the material is purchased, it is necessary to correctly deliver it to the construction site, as well as carefully, without damage, unload and lift it to a height.

Prices for various types of corrugated board

Decking

How to avoid damage during transport and installation of the material?

It is important to highlight this issue because damage to the corrugated board during its delivery, unloading and installation will significantly reduce the life of the future roof.

This material is made from steel sheet, which is embossed by cold rolling in special equipment.

Such material, laid as a roof, is able to withstand high wind and snow loads, but during its transportation, loading and unloading, the sheet coating can be subjected to unnecessary mechanical stress, which will lead to its damage. To prevent this from happening, you must follow certain rules for transporting, storing, carrying and lifting sheets.

• Transportation of a professional flooring is made on trucks. The sheets must be stacked in piles on a rigid base of the body or on a special metal frame, which is fixed in the body at an angle.

• After laying the roofing material in the car, it must be securely fastened with slings to avoid the sheets rubbing against each other when the car is moving, since this can lead to damage to the protective coating.
• The car transporting the corrugated board must move at a speed of no more than 80 km / h.
• It is very important to ensure that the unloading of the roofing is carried out with the utmost care. If unloading will be done manually, it is desirable that each of the sheets be removed from the stack separately, transferred and placed in the place prepared for them. It is best to prepare the flooring from boards and plywood, covered with polyethylene on top.
• It is required to ensure that none of the sheets is bent during transportation, since it will not be possible to return it to its original state, which means that during coating, gaps form between the sheets that will violate the evenness and integrity of the roof.
• To raise the corrugated board to the roof without harming it, you must also do it correctly:

- for accurate lifting of the material, logs will be required, which are installed at an angle to the roof - these will be a kind of "rails" for the convenience of lifting sheets;

- sheets rise to a height of only one piece;

- the laying of corrugated board on the roof itself can be done by two masters, but it is better to lift the roofing material to a height with three people - this is an additional insurance for the integrity of the material and the safety of work.

Now a few words about how not to damage the corrugated board during installation.

The maximum risk of damage to the material is added if a large area of ​​​​the roof is covered, since during the installation and fastening process it will be necessary to walk on the already laid roof. Therefore, it is necessary to choose the right shoes for work - it should not only be comfortable, but also have a soft elastic sole that cannot damage the protective layer and will not slip on the roof surface. It is possible to step on the fixed roofing material only between the ribs and only in those places where the guides pass, especially if there is a large step between them.

In order for the installation to take place neatly, without unnecessary damage to the roofing material, you need to use only high-quality tools. For work you will need:

• Screwdriver.
• Roulette.
• Scissors for cutting metal up to 0.6 mm thick.
• Marker for marks.
• Level.
• Electric drill.
• Rubber mallet.
• Electric jigsaw or electric scissors.
• Soft brush for sweeping away metal shavings.

It is forbidden to cut the corrugated board with a grinder. The best tool for this is electric scissors.

Features of the installation of corrugated board as a roof

In order for the installation of roofing material to be successful, it is necessary to take into account some features of the work.

Influence of roof slope on installation

Much in the process of covering with roofing material depends on the slope of the roof. It is very important to correctly position the boards or lathing bars, as well as observe the required amount of overlap of corrugated sheets.

• If the slope of the slope is 5 ÷ 10 degrees, then the crate is made solid or the slats are nailed at a distance of no more than 5 ÷ 7 mm from each other.

The overlap of the sheets in this case should be horizontally in two waves, and the top to the bottom row should be at least 300 mm. And with such a small slope of the slope, the gaps between the sheets of corrugated board are most often filled with sealant, since there is still a risk of water leaking between them, especially in windy weather.

• With a roof slope of 10 ÷ 15 degrees, the distance between the lathing bars is 400 ÷ 450 mm, and adjacent sheets are overlapped in one wave. The top row should overlap the bottom row by 200 ÷ 220 mm.
• With a roof slope of more than 15 degrees, the lathing bars are fixed on the rafters distance of 550 ÷ 600 mm. The overlap of the sheets stacked next to each other is made in one wave, and the top row is superimposed on the bottom row by 170 ÷ 200 mm.

To make it convenient to mark and fasten the crate, it is cut out to the right size, for example, 600 mm, which will help to mount the frame under the roofing much faster.

Order of fixing sheets

It is very important to follow the sequence of laying sheets if the coating will consist of two or more horizontal rows of corrugated board.

• Laying of roofing material starts from the eaves. The edge sheet is set strictly according to the building level, since the correct laying of all other elements of the roof will depend on its evenness. In addition, the stacked sheets are aligned along the lower edge of the overhang - if this method of alignment is excluded, then the lower edge of the roof will be uneven.

• Upon completion of the installation of the first row, fixing the second one begins on the same side of the roof from which the first was mounted. However, some craftsmen also practice a different approach - with sequential laying of the bottom, and then the top sheet, or with the laying of a "ladder" - for example, two sheets from the bottom - one from above, that is, the top row constantly "lags behind" by 1 sheet.

The best option is if the length of the sheet is sufficient for the entire roof slope

• If it is possible to purchase sheets equal to the length of the slope, then this option should be preferred - this will reduce installation time, and the roof will be more reliably protected from leakage, since there will simply be no horizontal overlaps of sheets.

Rules for fastening corrugated board

It is carried out using special self-tapping screws equipped with a press washer and a rubber gasket. To make the roof look aesthetically pleasing, self-tapping screws are usually matched to the color of the base material.

• If the roof is covered with canvases that are solid along the length of the slope, then the first sheet is temporarily fixed at the top below the roof ridge by 50 mm and at the bottom, on the overhang. The sheet should protrude beyond the edge of the overhang by 40 ÷ 50 mm. The upper distance left open will become a ventilation gap and will later be covered from above with a ridge element.
• The second sheet is overlapped with the first one or two waves, depending on the slope, aligned with the overhang of the first sheet and screwed with a self-tapping screw.

• Subsequent canvases are laid and aligned also along the overhang and fastened together on the crest of the wave. Their fastening takes place from the eaves to the ridge with a screwing step of 500 mm.

• When 3 ÷ 5 sheets of corrugated board are laid, and they are aligned along the edge of the overhang, their capital is fixed to the crate. The canvases are attached to the crate in the lower part of the wave, immediately after the overlap of the sheets, and then, passing one wave, along the bottom of the second.
• If two or more horizontal rows are laid, then in the strip of their overlap with each other they are fixed with self-tapping screws along the bottom of each wave.

If polymer-coated corrugated board is installed, then after screwing in the screws, it is recommended to remove the formed metal chips in order to avoid damage to the protective coating of the roofing material. It is completely swept off the coating with a soft brush.

It is also necessary to stipulate the requirement that in no case can the corrugated board be fixed on the crate with nails or rivets, since such fasteners will not hold the canvas in the event of a high wind load. The wind can easily tear off the roofing, and the nails will remain in the bars of the crate.

Installation of additional elements

In addition to corrugated sheets, there are other elements in the roofing structure that help protect the building from the penetration of precipitation into the attic. It should be noted that the presence of even one formed or unclosed gap in the roof can seriously damage the ceiling, as well as the walls and ceiling of the house.

Additional elements of the roof include a ridge, valleys, lining of pipes passing through the roof, cornice boards and others.

Skate mount

After the installation of corrugated sheets is completed, at the highest point of the roof, its edges are covered with a ridge.

The ridge is fixed with the same self-tapping screws, through the top of the corrugated boarding waves, with a step of 200 ÷ 300 mm. In order for the fastening to become reliable, it is necessary to foresee two longitudinal boards on both sides of the ridge when installing the crate.

When installing the ridge, it must not be pressed closely to the highest point of the roof - there must be a ventilation gap between it and the inner surface of the ridge element.

If a semicircular type of ridge is installed, then special plugs are installed and fixed on its end sides.

Since the skate is assembled from separate elements, they are also overlapped. Simple skates, having the shape of an angle, should have an overlap of 120 ÷ 150 mm, and semicircular (tiled) - 100 ÷ 120 mm, with their alignment along the stiffeners.

Take advantage of our article.

Finishing the gable part of the roof from corrugated board

To exclude the possibility that the corrugated board will be torn off by the wind from the end side, the gap between the sheets and the crate is closed with wind angles or planks, which are superimposed on one side of the corrugated board, and on the other - on the first rafter facing the end of the building. The bar is also fixed with self-tapping screws with a pitch of 400 ÷ 500 mm.

Facing the end part of the roof. 1 - wind bar, 2 - self-tapping screws

Since the planks are also made up of individual elements, they are overlapped by 70 ÷ 100 mm.

Cornice fixing

The eaves are installed before the flooring of the main roofing material. It plays both a decorative role, closing the side connections of the truss system, and a functional one, preventing splashes from falling onto the wooden parts when water flows from the roof into the drain. In addition, brackets are attached under the cornice or on top of it for laying the gutter.

• Most often, at first, the drain brackets are fixed to the crate with self-tapping screws at a distance of 500 ÷ 600 mm from each other. They are lowered below the crate by 100 ÷ 150 mm.
• Then the gutter is installed on the brackets.
• After that, a cornice strip is installed and nailed or screwed to the bottom board of the crate.

• Sheets of corrugated board are laid on top of the cornice strip, and must be leveled so that the water draining from them directly falls into the fixed gutter

Valley installation

The installation of a valley is not required for every roof, but only where it has a complex configuration with profile fractures. If there is a conjugation of two planes, turned downwards, then mounting this element is indispensable.

The valley consists of two parts - internal and external.

• The inner part of the valley is laid even before the roofing. It is fixed at the junction of two roof planes and fixed to the crate with roofing screws in increments of 350÷500 mm. Separate parts of a long valley are laid, starting from the eaves and rising to the ridge, with an overlap of 150 ÷ ​​200 mm.

• After the sheets of corrugated board are laid (with a shift to the inside of the valley by 80 ÷ 100 mm), a layer of porous sealant is laid between them and the inside of the valley. This material will prevent leakage during rain. Then the corrugated board through the bottom of the waves with a step of 400 ÷ 500 mm, together with the lower part of the valley, is screwed to the crate with self-tapping screws.
• After that, silicone sealant is applied to the edges of the sheets of corrugated board, and the outer part of the valley is laid on it. Just like the inner part, it is composite, so its parts are overlapped by 100 mm, starting installation from the eaves and anointing the joints with sealant.

• After that, the outer part of the valley is screwed with screws to the corrugated board.

Fastening snow retainer

Snow guard- this is an element that will not allow a sharp descent of snow from the roof in the spring, delaying it and giving time to melt and drain with water or evaporate.

Snow guards There are two types - these are peculiar strips in the form of corners, scrolling in a checkerboard pattern, or horizontal tubular barriers installed in special brackets.

The brackets are attached to the corrugated board surface at a distance of 900 ÷ 1000 mm. Then, special tubes with threads along the edges are inserted into the holes in them, onto which, after their installation, metal plugs are screwed.

Both brackets and slats snow retainers fastened through the corrugated board to the crate. When fixing the planks, they are screwed through the top of the wave, so gaps are formed between the plank and the corrugated board, through which the melt water will leave.

Wall profile covering the joint between the wall and corrugated board

If the corrugated roof is adjacent to the wall, then the joint between them must be closed to prevent leakage. For this, there is a special figured bar - a wall profile, which is mounted on the wall with the help of anchor fasteners, and on the metal profile - with self-tapping screws screwed into the crest of the wave.

Silicone sealant can be used to seal the junction of the plank with the wall. It is also advisable to make a strobe in the wall in order to hide the upper curved edge of this profile into it. After installation, the strobe can be sealed, for example, with cement mortar or tile adhesive for outdoor use.

Seals for corrugated board

Sealers are used in roofing to close gaps at the joints of the coating with the wall, in places of "fractures" of hipped roofs and under the ridge.

Seals usually have an adhesive layer on one side, covered with parchment, which is removed before installation, and the material is glued in the right place.

Making the passage of the pipe through the corrugated board

If a chimney of a stove or fireplace, or a ventilation duct, passes through the corrugated board, you will have to work on it. But before do work on the external finish of the joints, it is necessary to install around chimney inner apron, which mounted before laying on the corrugated boarding crate.

An apron is installed around the pipe from separate metal adjoining profiles. Using a marker, a line is marked on the walls of the chimney along which a strobe will be punched to bend the upper edge of the adjacent profiles into it. Then it must be thoroughly cleaned of dust and rinsed with water.

After that, the so-called tie - stripe a metal sheet having flanges, which are mounted from the pipe to the eaves. A tie is needed to drain the water that accumulates behind the pipe during rain.

After that, the lower part of the apron must be fixed for sealant, on crate and a tie laid on the sides of the pipe, and install the upper edge in a strobe, also on sealant. When installing the parts of the adjoining plank, they must overlap each other by 150 mm.

After the internal work is completed, the installation of corrugated board is carried out. When the roofing material is laid around the chimney pipe, the outer apron strips are mounted, which are fixed on the pipe and on the ridges of the corrugated board on the roof.

The general sequence of roofing with corrugated board

So, knowing how the installation of all additional elements and the corrugated board itself is carried out, we can consider the sequence of work on covering the roof with this roofing material.

• The first step is to cover the truss system. It is laid from the cornice, horizontally overlapping the slope by 100 ÷ 150 mm. The film is fixed with a stapler with staples on the rafter legs.
• On top of the film to the rafters are nailed bars of the counter-lattice, which will create the necessary ventilation gap between the film and the roofing material. The size of the bars should be 400 × 500 mm, that is, the ventilation gap will be 400 mm.
• A crate of slopes is arranged perpendicular to the counter-lattice. Here it is necessary to provide additional ridge boards - they are located on both sides of the roof ridge. Also, additional boards or bars are mounted around the chimney pipe and at the joints of the roof planes to secure the valley (inward angle) or ridge element (outward angle).
• Further, wind boards are fixed on the gable sides of the roof.
• Then brackets for the drain gutter are fixed on the bottom board of the crate, and the gutter itself is laid.
• A cornice plank is nailed to the extreme board of the crate.
• The next step is to fix the inside of the valley, if necessary in the roof structure.
• Then you can proceed to the arrangement of the waterproofing of the chimney pipe. A tie is laid along its edges, going to the cornice - it is fastened over the cornice strip. Next, install sealed elements of the inner apron adjacent to the pipe.
• Having dealt with the internal additional elements, which should be under the roofing material, they proceed to the installation of corrugated sheets. To pass the pipe in one or two sheets, an opening of the required size is measured and cut out with the help of electric scissors. The edges of the corrugated board should cover the parts of the apron fixed on the crate and come close to the pipe. It is possible to leave a gap of 50 ÷ 70 mm.
• Further, at the junctions of the two sections of the roofs, the outer part of the valley is fixed.
• After that, metal elements of the ridge are fixed at the highest point of the roof.
• The last step from the gable side to the corrugated board and the wind board is fixed windproof corner.

So, as you can see, there is nothing supernatural in laying such a roof. Having studied the sequence of work and the technology of their execution, enlisting the assistance of reliable assistants, acquiring the necessary material, preparing tools, you can safely start covering the roof with corrugated board on your own.

And at the end of the publication - a useful video with the intricacies of the process of corrugated roofing.

Video: important nuances when laying corrugated board as a roof

High-quality roofing of your home is a guarantor of reliable protection against leakage and destruction, which, first of all, will provide coziness and comfort.

Steel is one of the most durable and strong materials, but its only drawback as a roofing material was its weight. The totality of heavy sheets in total gave a huge mass, which negatively affected the roofing frame. The problem that arose was solved by corrugating a steel sheet, which, having a small weight in relation to its size, retained its strong and rigid qualities due to the trapezoidal profile design - this is how corrugated board arose.

Over the past few years, it has gained great popularity due to its practicality in use, as well as minimal harm to the environment.

Decking - what is it, its pros and cons

Profiled flooring is produced by cold rolling from hot-rolled steel sheet. During production, it is treated with several layers of protection to increase strength and durability. At the initial stage, the workpiece is treated with anti-corrosion phosphate and only then it is primed. The upper part of the sheet is covered with a mixture of polymers, and the lower part is covered with a special varnish.

Thanks to the work done, the result is a durable high-quality material that combines many more pluses than negative qualities.

1. Service life of the material;
2. Competitive price with other types of roofing materials;
3. Material weight;
4. Simplicity and time saving during installation and dismantling;
5. Resistant to temperature changes.

The disadvantage of corrugated roofing is the low level of sound insulation, due to which the sound insulation is significantly worsened.

Types of corrugated board

The widespread use of corrugated board and not only in roofing has divided all its types into three classes:

1. H - for coatings and ceilings, as well as fixed formwork (the best roofing material). Additional stiffening ribs, corrugation thickness and height make it the most reliable and durable option.
2. C - for fencing fences and walls. This option is much cheaper than the previous one. The thickness of the sheet is less, respectively, the service life and reliability are significantly inferior.
3. HC - combined corrugated board. The brand is also often used in roofing, but in most cases for unloaded roofing. It all depends on the angle of the roof slope, which is an important factor in winter. A thin sheet of steel and a flatter roof structure can be fatal under snow pressure.

​

Roof slope

For the correct laying of corrugated board, it is necessary first of all to take into account the slope of the roof. This will help calculate the desired overlap with the adjacent sheet.

• When the roof slope is less than 15° or more than 12°, the overlap of sheets must be at least 20 cm;
• In cases of inclination angle 15°-30° - from 15 to 20 cm;
• The slope of the roof above 30 ° allows you to reduce the overlap to 10-15 cm;
• A slope angle of less than 12° requires additional work to seal the overlaps using silicone sealant.

Preparatory work

Before the laying process itself, it is worth carefully and correctly calculating the amount of roofing material and its type. You can do this yourself or use the service of a company whose manager will help you.

1. During transportation and loading, avoid strong kinks, and also ensure a level surface for the vehicle that will transport the material.
2. Manual unloading provides for every 2 m of length of one worker. When using lifting equipment, it is necessary to use soft slings.
3. Transportation to the roof is carried out using a log to connect the edge and the ground, not exceeding the norm in one sheet.

Without fail, you will need such a tool as: a tape measure, a hammer, a hacksaw, a cord, a rail, a drill and drills.

Waterproofing and ventilation

Moisture released from the premises of the house always collects under the roof. To prevent this, it is necessary to organize the roof in such a way that the temperature outside and under the roof are the same. To achieve this goal, you need to take care of the correct vapor and thermal insulation, as well as ventilation.

Waterproofing is most often mounted before fastening sheets of corrugated board to the crate.

where 1 - rafter leg; 2- waterproofing; 3- truss slats (bar konrobreshetki); 4 - crate.

Pro tip: install the waterproofing film so that it hangs slightly, about 20 mm, in a position perpendicular to the roof slope. Installation should begin from the lower edge of the roof to the ridge. Its overlap, sealed with adhesive tape, should be 100-150 mm.

The method of laying the film on the rafters:

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To ensure the most efficient movement of air flow from the eaves under the roof ridge, ventilation holes are organized between the ridge strip and the roofing sheets. In places where air flow is difficult, it is necessary to make additional channels for ventilation. However, the easiest way is to place wooden slats directly on the waterproofing layer.

Rafter strips and lathing

Rafter strips or steel girders are mounted on top of the hydro and vapor barrier if the profile height becomes 40 mm. Further, a crate is attached to them in the longitudinal direction, the step of which depends on the type of corrugated board.

To organize the crate you will need:

• beam size 50x50 mm;
• board 32x10 mm;
• moisture resistant plywood sheets with a diameter of 10 mm.

The crate is of two types: solid and thinned. The first type is installed on the ribs, skates and around chimneys. The thinned pitch is 50 mm. Lay the boards at the same distance, this will facilitate the entire further process of fastening corrugated sheets.

Be sure to treat all wooden parts with an antiseptic and fire-fighting mixture.

Experts advise laying a so-called diffusion gasket on top of the crate, which will prevent the formation of condensate. It is fastened with small nails with a wide hat.

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The arrangement of the crate should be taken with special responsibility, since the reliability of the entire structure largely depends on it.

There are also no exact standards for the thickness of the crate, it all depends on the same parameters of the profiled sheets and the length of the fasteners. The minimum cross-sectional dimensions of the crate become 32/100 mm. The board that is located along the eaves should be a little thicker than all the others. Near the chimney, it is necessary to organize the fastening of additional boards.

Eaves overhang

We lay the bottom row of roofing corrugated board on the crate, thus forming a cornice overhang. Its dimensions completely depend on the height of the profile sheet.

However, initially it is necessary to take care of the cornice strip, which must be organized below the waterproofing layer. This is necessary so that the wastewater and the resulting condensate fall into the eaves, along which they flow into the catchment area, and then through the downpipe. Otherwise, water will flow down the walls of the house, which will cause negative consequences.

Installation of corrugated board

It should be noted right away that the installation of corrugated sheets should be carried out strictly according to the instructions.

Cutting of corrugated board

Of course, it is better to purchase sheets of corrugated board on the market that correspond to the size of the roof, but often these two parameters do not match, so you need to know how to cut it correctly and which tool is best to use for this.

The adjustment of the material must be carried out on a flat plane, for example, on the ground.

For these purposes, you can use a variety of tools, but it is best to use electrical devices such as a drill with a disk nozzle. If you could not get such a tool, then you will have to cut it manually with steel-based metal shears or a hacksaw with fine teeth.

It is forbidden to use mechanisms with an abrasive cutting working disk, for example, a grinder, to cut sheets of corrugated board. The reason is that such devices emit relatively large heat energy during operation, which negatively affects the performance of the material.

When cutting roofing material, the edges will not be without damage, so you need to take care of the paint in the color of the corrugated sheets in advance.

We raise sheets of corrugated board to the roof

During the lifting of the roofing corrugated board to the roof, difficulties often arise due to the dimensions of the material, therefore, for comfortable work, it is best to perform this stage of work with the help of a log.

They should be installed in such a way that on one side they rest against the ground, and on the other side directly against the eaves of the roof slope.

Between the planks there should be a distance slightly less than the width of the corrugated sheets themselves. Thanks to this system, it is possible for two people to lift the roofing sheet for further installation without any problems. You can replace the logs with an ordinary staircase without a railing.

Fastening sheets of corrugated board

Roofing with corrugated board should be carried out, observing the following technology:

• Sheets should be fastened with 80 mm hex self-tapping screws and a sealing gasket. At the same time, it is worth remembering that you cannot overtighten the screws, as this can lead to excessive gasket density, as a result of which the waterproofing layer may suffer.

• Sheets should be fastened at the bottom of the wave, and in ridge elements and in places of overlap - at the top.
• It is best to start installation from the end of the ramp. The side overlap should go halfway up the wave of the sheet. However, if the slope is gentle (the angle of inclination can vary from 8 to 120 degrees), then to avoid leakage, the overlap should go 1.5 waves.
• At transverse and longitudinal joints, it is necessary to make additional sealing with self-adhesive tape or bituminous mastic.
• The front parts of the roof should be equipped with wind pads that will protect the corrugated roof from destruction and blowing. They need to be fixed with self-tapping screws, the pitch of which is 200 mm.
• Depending on the height of the wave, the length of the self-tapping screw L is also selected, which is equal to:

L= L1+H+L2, WHERE

L1,L2 - respectively the profile thread (about 25 - 30 mm) and the thickness of the washer with the seal (about 3-4 mm), H - the height of the corrugation.

Approximately 5-8 self-tapping screws should be used per 1 m2.

Installation of corrugated roofing - video:

Making a gable cut

To prevent breaking sheets of corrugated board during strong gusts of wind, it is necessary to properly equip the gable cut.

If the allowance of corrugated board sheets from the front of the house is 50-70 mm, then a wind rail with dimensions of 25x80 mm is used, which is fastened with self-tapping screws. If the allowance from the front of the house is insignificant or not at all, then in addition to the rail, a wind bar is also used. It looks like an ordinary steel corner. It must be fastened in increments of 200-300 mm and with a transverse overlap of 100-150 mm.

To adjoin the slope to the wall, corner strips are used. Planks, regardless of the type of junction - longitudinal or transverse, should be mounted using self-tapping screws with a pitch of 200-300 mm and an overlap between these planks of about 100 mm or more.

Cross connection to the wall:

Longitudinal junction to the wall:

Installing the skate and snow barrier

Start the installation work associated with fastening the ridge, follows from the side that is less prone to gusts of wind and leaders. For example, if for your area the west is considered the predominant windy side, then it is better to start fastening the ridge from the east. It can be simple, figured or tiled. The ridge is fixed using self-tapping screws with a pitch of 200-300 mm; also, do not forget about the sealing gasket and the ventilation gap.

The snow barrier is especially relevant during the thaw, it prevents avalanche snow from the metal roof. It must be installed slightly below the edge of the roof across the roof slope. Fastening is carried out in pre-mounted bars.

Roof insulation from corrugated board

To insulate the roof, you will need mineral wool and a vapor barrier. Together with mineral wool, you can also take Durra insulation, but this one is the most effective.

And so ... we go down from the roof to the attic and you can proceed to the final stage of arranging the roof from corrugated board.

Mineral insulation can be rolled or sheet, whichever you choose - it does not matter, since both have excellent performance properties. It is mounted in the gap between the rafters, any method can be used for its fastening - screw it with screws, fix it tightly with a thread or glue it. The main thing is that any of them perform their functions, and at the same time do not unnecessarily compress the seal, since it is not the cotton itself that keeps the cold outside, but the air that is located in it.

2 crate; 3 - sealant; 4 - skate; 5- layer of waterproofing; 6.7 - rafter bar and leg, respectively; 8 - mineral wool; 9- vapor barrier; 10- ceiling rail; 11 - lining or some other finishing material; a - roof ventilation; b - ventilation between waterproofing and mineral insulation.

Then a vapor barrier should be attached over the mineral wool. It is necessary in order to prevent the ingress of moisture that is in the air into the insulation, as this can significantly reduce the performance properties of mineral wool - the more moisture it absorbs, the more difficult it will be for it to retain heat.

It is worth remembering that the entire space of the roof does not need to be insulated, but you should take care of the so-called cold triangle. The space located at the top of the roof at a distance of 300-400 mm must be left untreated with mineral wool, as this cold triangle will promote good air circulation in the attic and in the inside of the roof.

Installation of a corrugated roof is also allowed on an old roof, which meets all its operational properties, this will increase its thermal insulation properties.

The cost of corrugated roof installation primarily depends on the complexity of the structure, dimensions and, of course, on the roofing material itself.

Care of a professional flooring

In care, this roofing material is not whimsical at all. However, it should be handled with extreme care, as profile sheets can be easily damaged. Before installation, do not lay them on the ground, but rather use a special wooden stand for this, the boards of which are about 25 cm thick and arranged in 50 cm increments. At least once every six months, do a general cleaning of the roof from dirt, sheets and other "pests".

If there are scratches on the sheet, then there is nothing to worry about, since the zinc layer located under the plastic will protect the corrugated board from rust, and the damage site can be treated with paint of the same color.