Overoral flooring can spoil the view of the interior. In addition, such coatings cannot be laid nor laminate or parquet. Therefore, first of all, when repairing, you should think about the tie of the floor: wet, dry or semi-dry. It all depends on the deadlines, costs and effort. Semi-dry floor screed is the most demanded technology.

The technology of a semi-dry screed is quite simple, which makes it very popular in the construction industry.

Semi-dry alignment

If you do not know what it is, the semi-dry band implies flooding floors using a semi-dry hard cement-sand solution, the strength of which is provided by polypropylene fiber or metal mesh. By timing, a similar type of screed is a cross between dry and wet tie. If the dry screed allows you to continue working at once, and wet - after 2-4 weeks, then semi-dry - 4 days later.

At the same time, a semi-dry coupler has a number of advantages. When it is used, low-cost quality materials are used. After applying, leveling the rules and grinding of the cement-sand layer, it does not need additional processing: it is not necessary to moisturize, smooth. In this case, a smooth monolithic basis of high strength is obtained, which is "not afraid of" shrinkage and cracking.

After the completion of the work, the screed is ready for use after 4 days, it does not crack and is not exposed to shrinkage.

In the process of installing a semi-dry screed, it is not necessary to worry that the liquid will leak out of the solution and flow to the lower floor. The semi-dry screed with the addition of fibrovolock is resistant to mechanical influences and durable, and also has heat and sound insulation properties. Such a screed is mounted using the use of funds than the process is greatly facilitated.

Semi-dry floor screed

Semi-drying floor screed, shown in video, is used with thin floors, fluid leak risk to lower floors and with compressed repair periods.

It is applied to such bases as the rammed gravel-sand or sandy soil (private houses, basements, the first floors of the buildings), concrete and wooden floors.

Necessary materials

A semi-dry band screed with sandy cement mortar is performed. To ensure the monolithic and strength of the screed, a reinforced metal grid is applied, falling asleep by half-demaths, or fibrovocol is added to the solution. Due to the polypropylene fibra, cracks can be avoided. To perform a semi-dry screed with inclusion of fibrovolock, the following materials are required: Sandy sand, fibrovolok, edge ribbon from foamizol (isolon, polyisole), cement and water.

Fiber soloral in the solution prevents the formation of cracks.

The use of the anticounter steel mesh reduces the crack formation, and during the formation of cracks, it is capable of keeping the material is monolithic. To perform such a screed based on the mesh, it is necessary: \u200b\u200bwire and anticoned mesh, cement, elastifiers and hardware, edge ribbon, sand and water.

To carry out a semi-dry coupler on a floating basis, additionally providing thermal insulation, materials are used:

• To smooth large irregularities: self-removing solution or tile glue;
• For waterproofing: filtered rolled material (for example, rubberoid with bitumen);
• For insulation: Minvata, extruded or foamed.

Preparation of solutions for alignment

Semi-dry floor screed, the cooking technology of which requires the use of fibrovolock (if watching videos, as is done), is prepared in such a manner. 50 kg of cement, 150 g of fiber fiber and 120 liters of sand fall asleep into the pneumatic pump. To the room of 20 sq.m. Fiber consumption is 0.54 kilograms. Everything is stirred for three minutes, then water is added, the mixture is mixed again and is fed to the place of screed through the hose.
When used in the process of preparation, the solution takes 3 parts of the sifted sand and 1 part of Portland cement-400.

The composition of the solution for a screed with proportions.

The solution can be prepared on the site of the styling of the screed, without using even the concrete mixers. First, the sand falls asleep, then cement. Gradually, water is added to the dry mixture. Water is added so much so that the solution is plastic. It is easily formed if you take it in my hands, while it should not drain water.

An elasticizer is also added when the stones are also added, thanks to which the screed becomes more stable and elastic to an increase in temperature. The mixture is well mixed, then applied to the base.

In addition to the conventional mixture, it is possible to use sandbetone and other ready-made mixtures for a floor screed, based water in accordance with the instructions.

The minimum set of tool for mounting the screed with your own hands.

Plasticizing materials, light fillers, hardening accelerators, reinforcing fibers such as claymps or foam crumb are added to solutions for screed.

Careful mixing of the mixture is a guarantee of a qualitative future screed. Device semi-drying floor tie, given what the technology assumes requires the following tools: a concrete mixer, level, thermalism, rule (2-3 meters), a spatula, a pneumatic pump with a hose, sander, beacons, trowel, vibrating plates for the rambling and wooden or polyurethane grater.

Effective technology

Semi-dry band screed with their own hands is performed on two technologies.

Method 1

Cleaning the room. First prepared the basis. For this, the remains of old coatings are removed, the garbage is sweeping and the remaining surface is studied.

Primer base. If there are deep holes, sharp protrusions between the plates, they are coated with or special glue, or primer. It is important to smooth out the flaws. Also primer will prevent the absorption of moisture.

Primer - an important preparatory stage.

Laying damper tape. Application, it is necessary in particular in the process of installing warm floors, because the temperature affects the subsequent quality of the coating. You can buy a tape or cut the roll of foamed polyethylene on the tape. It will ensure the safety and sound insulation of the screed.

Laying solution. When the solution is cooked, the laying of the first layer begins. It has a thickness of about 20 millimeters. This layer is thoroughly tamped, then the reinforcement grid is stacked. Slices of mesh interconnected with wire or welded. From above, 3-4 centimeters of semi-dry solutions are shuffled and tamped. In the presence of fibrovolock in the solution of additional reinforcement is not required. If you doubt the correctness of your actions, you can download the appropriate GOST from our site, where the technology is painted to the smallest detail.

Aligning surface. Alignment of the solution is necessary to obtain a smooth surface. Laser levels are determined by the foundations of the base. An important stage of work is to install beacons. You can use a profile for drywall, stacked in the mixture, and after them is aligned with the right surface and excess material is removed. To set the lighthouses from profiles, the entire surface is drawn by lines.

Between them, the distance should not be greater than the length of the rules, with which the floors are leveling. Along the lines fasten the slides of the solution to which the profile laying is made. Rebb on profiles set a rule that is then stretched in the direction of profiles. Excess material is removed, and the grooves are slightly loose, and the mixture is again added.

Grinding the mixture. A grater is used for grouting semi-dry mixture. After easy frosting, the profile solution is removed, and the traces of them immediately poured the mixture and grind. For this, the grinding machine is used. You can consider this process in detail in the photo.

Grinding machine.

Caring for tie. After laying a screed, it is covered with a film in order to avoid its rapid drying. So that the cement stone is ripe, it is necessary to provide humidity regime for 24 hours at a 5-centimeter screed. Already after 4 days, laying decorative outdoor coating: from linoleum to vinyl tile and parquet board. Such a screed allows you to stack any materials.

Method 2: With reinforcement

A semi-dry band screed with his own hands can be performed with reinforcement (see), it is called a "semi-dry floating screed". It is carried out using a simple mixture and metal mesh stacked on a layer of thermal insulation materials.

Cleaning premises. First, the entire garbage is cleaned with the base for the screed, including the remains of the old coating.

Smoothing irregularities. If there are irregularities and bulges, they are poured with glue. It is important that there are no bulges, recesses and sharp transitions on the surface. The convexities are written or knocked, wetted with water, then glue or solution is applied. Do not hurry to apply a selfiemelire, otherwise all the liquid will be flipped in one place, while the opposite effect is achieved. For smoothing irregularities, Locarur, Bikrost, TechnoNikol are used.

Soundproofing. On the perimeter of the room, a tape of foamed polyethylene is laid. The mounting of the edge ribbon is performed by liquid nails, silicone or bilateral tape. Strips must have a slightly more width of the alleged screed. Unfront is cut off. The edge can become a layer between the screed and the wall, provides durability, depreciation and sound insulation of the structure.

In order to avoid moisture receipt in the premises of the first floor or bathrooms, all seams are hermetically sampled, and then applied using a roll material.

Pre-rolls are heated, filmed on the lower edges of the walls and the base, the strips are glued together. It is more economical to apply rubroad with bitumen impregnation.

Floating screed. Before laying a layer of thermal insulation with a laser level, the entire area is diminished, and unevenness is determined, the corresponding marks are made on the walls. In areas where there are deep recesses, an additional layer of expanded polystyrene is laid. To fit the thickness of polystyrene under the required, the thermalism is used. It is cut out the layers of foam of the necessary thickness.

Installing beacons for a screed.

Installation of beacons. Lighthouses are screwed onto a smooth floor surface. In this case, the screws on the tree. They are easily screwed, and adjustable in height. This method is suitable for foam, because it is loosely lies on the floor and has a small weight, confrontation from the place at any movement. In the process of laying the polystyrene foam layer in sheets, holes are made so that they normally lay down in areas where the beacons are mounted. Sheets are laid very tight, without gaps. If necessary, wiring and communications are stacked, in the foam you can easily cut holes - grooves.

When installing the pipe turn the insonle, and the laying of the wires is carried out in the corrugation of plastic or stainless steel. In the process of laying polystyrene foam plates between them, an unemployed track is left to not walk along fragile material.

Applying a layer of mesh and a solution. The mixture is mixed on the floor or in a container using a building mixer. The finished semi-dry solution of the shovel is scattered with a layer of 2 centimeters over the entire surface of the room. Then laying the grid. When using pieces of grid, they are attached to each other. From above covered and smash a new layer of the mixture. It is well covered. Then leveled in the level and rule. When irregularities appear in those areas, the solution is linked. For its best clutch with the previous layer, the bottom layer is slightly disappeared.

Grout. Grouting and grinding allow you to get perfectly smooth surfaces. After hardening the screed with the help of a metal spatula, bugs are knocked down, and the sections of their formation are aligned. For this, a frozen surface is wetted from the sprinkler, a solution of cement and sand is laid out (1: 1), it is maintained by a polyurethane or wooden grater. The surface after alignment is again checked by the level and rule. After that, the beacons are removed, and their locations are additionally rubbed. The surface grinding is carried out by grinding machine.

The semi-dry band screed, which has practically no disadvantages, and the reviews of which are mainly positive, is distinguished by durability and strength through the use of the reinforcing mesh or the inclusion of fibrovolock. For the simultaneous insulation of the floor, the technology of a "floating screed" with laying the thermal insulation layer is used. This type of screed ensures the strength of the structure, allows short time Get the finished floor, and also represents many means and methods.

Semi-dry floor screed - base equalization technology, using a rigid semi-dry mixture of sand and cement, supplemented for rigidity with a metal mesh or fibrovolok. Such a screed allows you to begin further work on the floor finishing much faster than when using a wet screed. After 4 days, further work can be carried out. In addition, this technology has other advantages and its drawbacks. About them more.

The dry screed method has quite a lot, among which you can allocate:

• Affordable price;
• Ease of installation, no need for additional processing and alignment;
• Lack of risk of leakage of excess moisture through overlap;
• Durability and resistance to mechanical exposure and loads;
• Good properties of sound and thermal insulation;
• Lack of increased requirements for temperature in the room during work;
• High laying speed;
• Reducing the risk of shrinkage and cracks during drying.

Disadvantages of semi-dry tie.

When the device is a dry screed, you can encounter some difficulties that can be attributed to the disadvantages of this type of screed. For example:

• Mixing the solution is quite difficult to produce, especially in the absence of specialized devices;
• Manually carry out the laying of the solution is not easy, so it is necessary to use a pneumatic stepper, which is not available to everyone;
• The laid composition reacts poorly to the effects of water, so it is necessary to cover it and take care of moisture;
• Since such a type of screed is not as dense, it must be laid in a thick layer, which increases the consumption of its components;
• The use of a dry screed method is uncomfortable on large squaresbecause it requires great effort.

The process of laying a semi-dry band screed, presented in the photo requires great effort, some skills and special equipment.

Features of fibrovolokna

Fiber-fiber is a material that has the ability to increase the strength and quality of concrete and cement mixtures, at the expense of its advantages:

• Fiber threads are distributed in chaotic order, which creates a high hitch;
• The use of this material allows you to minimize the occurrence of cracks, damage and shrinkage shrews;
• When using fibrovolok, there is no need for reinforcement;
• This material has low weight and consumption.

Depending on the complementary components, three types of semi-dry screed can be distinguished:

• With the addition of fibrovolok;
• Based on the grid (with reinforcement);
• Floating basis: provides additional thermal insulation.

Materials required for semi-dry screed

For semi-dry screed using fibrovolock, the following materials will be needed:

1. Cement;
2. Water;
3. Sand (sidewged);
4. Fibrovolok;
5. Edge tape, for example, from isolon.

To make a device semi-drying floor tie correctly, you must comply with all stages of work.

Preparation of solution

Semi-dry floor screed with their own hands begins with the preparation of the mixture. To do this, 50 kg of cement, 120 liters of sand and 150 g of fiber film are added to a special device. These components are mixed for 3 minutes. After that, it is necessary to add water and mix again.

Instruments

For work, the following tools will be required:

1. Building level;
2. Pneumatic stepper;
3. Grinder machine;
4. Beacons;
5. Thermalism;
6. Rule;
7. Putty knife;
8. Concrete mixer;
9. Vibratinglitis (for the ramming);
10. Wooden or polyurethane grater.

Process technology

Stages of work with any form of semi-dry screed are the same:

• Preparation of the foundation;
• Calculation of the required amount of solution;
• Laying of the waterproofing layer;
• Installing beacons;
• Laying of the solution;
• Surveillance of the surface;
• Grout.

The preparatory stage implies a complex of work and events. They have a significant impact on the quality of laying.

First of all, the previous coatings and decoration are removed. Then remove all dirt and dust. Preparation of the base is also repair or disassembly. old screed. It is necessary to do it thoroughly and not to leave places where at first glance the screed is still well held. All flaws and damage on the surface also need to be deleted.

After that, you can calculate the amount of the mixture required for operation. To do this, on the walls it is necessary to remove the level of the horizon with one mark, from which the markup is performed around the perimeter. Marks are transferred to other walls using a level. Then, you need to determine the highest point on the floor. This will allow to establish the presence of drops, which is required to adjust the amount of solution.

The phased process of laying a semi-dry screed (click to enlarge).

The next step is to lay waterproofing. To do this, you can take polyethylene film. Its bands must be laid with an overlap about 20 cm. Also, waterproofing should be climbing and on the wall - by 15 cm. Fixing the film on the basis is not necessary. At this stage, it is possible to establish insulating sheets if necessary. They are placed tightly, but do not press each other and to the walls. If clay is used, it is well smoothed and compacted.

To align the surface, you need. These are specially designed rails, which the rule is based on during alignment. They distribute them parallel to one wall, while the first lighthouse is located 20 cm from it. The following must be positioned at a distance of 10 cm less than the length of the rule.

The solution starts to distribute around the perimeter. Fill one of the bands between the beacons, and then it is moving. You can catch a solution with your feet and it will be enough. After that, it is aligned with the rule, which at the same time rests in the lighthouses. With a lack of solution, it must be added and revealed to the rule.

The layer of the solution must be at least 3 cm. The formation of a layer to 8 cm is maximally allowed.

The last step is the surface grout. It is performed by a disk grinding unit. You can also use a wide grout. Pull the surface need circular movements with effort.

After all the work, the surface should be covered with a film, so that the solution is faster than grab. It is impossible to become on the basis of the first 12 hours. The finish finish can be started in 4 days.

Streeting with reinforcement

This method is called "floating" semi-dry tie. Working on laying is divided into several stages:

1. Cleaning the base. At this stage, the entire garbage is removed and the base is prepared;
2. Smoothing and removal of irregularities. To remove some irregularities and depressions, they can be filled with glue. Protruding irregularities are knocked down or believed using the tool;
3. Installing the sound insulation layer. To do this, foam polyethylene or isolon is suitable. The edge ribbon is attached using double-sided adhesive, liquid nails. Strips need to do a little wider than the screed will be;
4. Waterproofing. All seams need to be punctured, then, using a roll material, you need to be pressed. For this, rolls are heated and applied to the base, as well as the lower edges of the walls. All strips should also be punctured. You can apply another variant of the material - rubberoid with bitumen impregnation;
5. . Using laser level, It is necessary to determine the unevenness and measure the area. In deep deepends, it is possible to install polystyrene foam. His sheets are installed tightly, without gaps. If you need to lay the communications, it will be enough to cut down the recesses and holes. The pipes available in the room should be wrapped with insonle, and the wires to put in the corrugation of plastic;
6. Lights. They must be screwed into the surface of the floor. You can use in this case the screws on the tree. They are quite easy and simply screwed, and allow you to adjust the height;
7. The mixed solution should be scattered around the perimeter of the floor, and then install the grid. If it is necessary, the grid pieces are copper with wire. Next, add another layer of solution. After that, it is carefully covered and start aligned using the rule;
8. Lastly, the surface is watched and grinding. Then remove the beacons. That surface where they were installed, additionally rub. Then the surface is treated with grinding machine.

Conclusion

Semi-dry floor screed does not require special skills and can be carried out independently. It is desirable to use specialized equipment for this, which will significantly reduce the time for laying and facilitates the process itself. During installation it is necessary to comply with all stages of work and accurately follow technology.

Modern technology for performing floor screed semi-dry method is based on the use of standard, manufactured in the factory, construction mixture. Such finished compounds Based on high-quality cement and a variety of improvement additives. Upgraded components not only make it easier to perform a screed, but also high quality strengthen the entire design, significantly increasing the strength indicators.

GOST 7473-94. "Mixtures concrete. Technical conditions. " Free download

Advantages and disadvantages

Like most building materials, Standard formulations for the fulfillment of a semi-dry method have some advantages and disadvantages due to the composition of the material and technology of execution.

In indisputable benefits include:

• enough democratic cost compared to "wet" analogues;
• no need to additionally align the floors;
• in the process of work, water is not used and the likelihood of even minor leaks is excluded;
• the presence of the porous structure of the finished tie can significantly increase the sound and thermal insulation characteristics;
• the possibility of formation of defects or cracking of the surface layer is minimized.

Disadvantages in independent execution of a screed of a semi-dry method are not noted, which makes it possible to recommend it as the most practical and qualitative method for aligning the floor surface. However, it should be borne in mind that the mechanized alignment of significant areas is very expensive, this is due to the high cost of delivering the mixture to the place of work and the supply to the laying area with special flexible pipes.

Main types of laying

Depending on the technology used, a semi-dry tie variants can be used:

• installation without applying a substrate with direct laying on a concrete base;
• floating type of screed with laying on a polyethylene substrate without clutch with the base of the floor and the surface of the walls;
• laying a screed with surface performing a sound insulation membrane;
• screed using heat insulating materials as substrate.

The most functional and in demand by a semi-dry floating screed with fiber fiber, which allows you to get the most high-quality and reliable tightening without the use of reinforcing components.

Preparatory stage

The responsible stage, from the quality of which the durability and reliability of the semi-dry screed are dependent.

Cleaning the surface

Special attention should be paid to the following nuances:

• when repairing or replacing the old screed, all layers to the base are subject to dismantling;
• the surface must be carefully cleansed from garbage and dust, and then coated with high-quality soil;
• all detected irregularities need to be cleaned with shallow skin, and significant areas of defects are aligned with a non-shy cement mortar.

Execution of measurements

Uncomplicated manipulations allow you to calculate the amount of solution necessary for work. The horizontal is displayed along the wall surfaces. Work can be performed using a standard level, however, it is much more efficient to use a laser level, which allows you to proper a straight line to all walls. Particular attention should be paid to the presence of drops in height from the ground, which helps to make timely adjustments to the amount of solution.

Laser level is installed in the central part of the room. In any arbitrary section of the floor near the walls, screw the screws with a minimal long to ten centimeters. A ruled self-screwing is established and a mark is made at the place of crossing the laser beam with the rule. It is convenient to perform a marker with a marker directly on the rule.

Similar to the first self-tapping screw at the opposite wall screws the second fastening element and set a rule with a mark made. The ray of the level should cross the mark on the rule. If the mark does not coincide, the height and direction of the rule can be adjusted by screwing and unscrewing the self-press located below.

By analogy, the markup of the entire room is performed. At least fifteen self-tapping screws should be installed near all the walls and noted one of them the center of the room.

Laying waterproofing and thermal insulation

Waterproofing is formed from high-quality polyethylene film with optimal indicators at least a hundred microns. The film strips should be stacked, withstanding the nourishment on each other and the lower part of the walls of fifteen centimeters. Next, the thermal insulation layer is performed from the leaf insulation.

For thermal insulation, it is required to use extremely reliable and qualitative material. The optimal option is the laying of plates based on extruded polystyrene foam. If necessary, get a minor heat-insulating effect or if it is supposed to form a high semi-dry tie, the use of clay with a fraction of no more than six millimeters is allowed.

Walls, columns and other architectural elements should be insulated around the perimeter by a damper tape with adhesive inland side. The upper edge of the tape should take a slightly tower over the future screed. Such a tape will not allow the screed to crack in the drying process, and the protruding parts can be trimmed before performing the finishing finish using a conventional building knife.

One of the most difficult and responsible stages responsible for the high-quality leveling of the surface during the execution of a semi-dry method. The device of special guides allows the rule to stop and evenly distribute the working solution on the floor surface.

It should be borne in mind that the use of semi-dry screed makes enough hard requirements for the arrangement of lighthouses and optimal option is the use of special T-profiles of factory manufacturer, which are called "Lighthouse"

Profiles of factory manufacture are distributed parallel to the surface of one of the walls. To install the starting light, the distance in twenty centimeters from the wall is taken into account. All the following beacons are exhibited, withstanding the optimally convenient distance from each other. Such a gap should be less than the length of the rules prepared for fifteen centimeters.

It is allowed to use beacons from cement mortar. To this end, a minor amount of solution is laid with an elevation between a pair of self-tapping and covered with a segment of wide scotch. Through the rule, it is necessary to press the coated mixture to the level of screws. After careful drying, cattle is cleaned, and the resulting elevation is an alternative to beacons from T-shaped profiles.

Working Rules

Despite the fact that the construction market offers an abundance of finished mixtures, many prefer to use a cooked working solution to perform a dry screed.

Basic rule: compliance with the correct proportions. The ratio of cement and sand is 1: 3, and the amount of added fibrovolock is calculated by formula 600 grams per 1 m³. In addition, it is necessary to add a plasticizer, the volume of which is equal to one liter per 100 kg. cement.

Standard Working Solution To fulfill a semi-dry method based on the use:

For the manufacture, any capacity, a suitable volume or special mixer can be used.

Cooking sequence:

• fall asleep 130 liters of river sand;
• add 140 grams Fibrovolokna and 0.5 liters of plasticizer;
• add 50 kg of cement;
• mix all falling asleep components thoroughly.

To the resulting mixture to add water in the volume of the order of fifteen liters. The resulting working composition should not be liquid. The quality of the resulting mixture is checked by compression large number in a fist. Optimal for work The composition does not highlight moisture, but looks a dense and non-painting lump.

Direct installation of tie.

A competently prepared solution when applied to the base and leveling will not stick to the tools, and forms a smooth and homogeneous surface without cracking.

The distribution technology prepared for the operation of the mixture involves applying a solution around the perimeter of the room with attitudes the edge of the waterproofing layer in the places of the adhesion on the walls. At the next stage, bands located between the beacons exhibited are filled. The laid solution must be tamped and spinning. Thus, the works are carried out progressively, separate areas.

Using automatic systems For the preparation of the solution and its feed, the entire surface is filled with a one-time and only then work on the coupling and resurrection.

It should be remembered that lighthouses can be left inside the tie, and the total thickness indicator should be about four centimeters. Minimal thickness should not be less than three centimeters.

Application and smoothing of semi-dry solutions

Video - semi-dry floor screed with your own hands

Alignment and grout

Alignment is only thoroughly rammed over the entire surface of the screed. For this process, a rule is used, which rests on the edges in the lighthouses exhibited and gently move from side to the side. Gradually moving forward, the rule not only rolls the surface, but also allows you to identify areas where the amount of solution is not enough. On such local segments, the worksee is added using a trowel or celma.

The final alignment is based on the need to sweep the finished surface of the screed. It is most convenient for this purpose to use special disk-type grinding equipment. However, self-alone filming of floors is allowed to be a common widespread bar, which with sufficient effort, performing circular movements, the entire surface is frozen.

The final stage is the creation optimal conditions To froze the applied solution. It is advisable to cover the surface with ordinary polyethylene film. Twelve hours later, you can check the quality of the screed and control the formation of voids, which are maintained by standard cement mortar consistency. Perform finish finish It is possible not earlier than four days after the removal of the sticker polyethylene.

Video - Technology manufacturing a semi-dry screed on polystyrene foam

Video - Rake for laying semi-dry tie

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Semi-drying floor screed is a method that is based on the use of a dry building mixture based on cement with various additives, reinforcing the design of the screed and making it durable and strong. This method of alignment of the floor is much more in demand among the population, as it allows you to significantly reduce the deadlines for the execution of work on tightening, and in the degree of complexity it is largely inferior to the classic concrete tie.

Advantages and disadvantages of semi-dry methods of filming

Before you throw a shop for a dry mixture for a screed, read the advantages and disadvantages of this floor alignment technique.

Benefits:

1. The cost of a dry screed is much lower than its "wet" counterpart.
2. Additional floor alignment is not required.
3. During the paper, water is not used, and therefore, the possibility of its flow to the lower floors is completely excluded.
4. Porous semi-dry structure cement tie. Increases sound and thermal insulation indoors.
5. After drying, the screed on its surface does not form defects and cracks, which are often so characteristic of concrete counterparts.

Disadvantages of semi-dry tie:

If we talk about a classic semi-dry tie, which is carried out by the personnel of this technique, but if we remember the mechanized method of tightening the floors, then there is one, but very fat minus is the high cost of work related to the delivery of the mixture to the destination and its lifting on the floor with flexible pipes.

For considerable visibility, look at the calculation of a semi-dry clip for an apartment of 50 sq.m.

The mechanized semi-dry band screed, of course, is made somewhat faster than the traditional, but if you chose this method, then be prepared for decent costs.

Methods for laying semi-dry screed

1. Screed without a substrate. Such a technology of semi-dry screed involves its installation directly on the concrete base.
2. Floating screed with polyethylene substrate. Why floating? Yes, it will not be seized with concrete and walls.
3. Screed with noise insulating substrate. This method provides for styling on top of a fresh screed Special sound insulation membranes, which, in combination with foamed polyethylene, give an excellent result.
4. Screed with thermal insulation substrate is used in apartments located on the first floors, or in private houses. It is also advisable to mount such a tie in apartments, temperature mode in which are broken as a result constructive features building. A mineralized plate is used as a heat insulating material.

In this article, we will look at the laying technology of floating semi-dry screed with a fiber-optic component, which allows you to perform floor tightening as soon as possible, since the reinforced grid is required to enhance the design.

Preparatory work

Stage 1. Cleaning the base

First of all, it is necessary to remove all the garbage and dust. The latter is desirable to remove with the help of a powerful vacuum cleaner. If there is no irregularities on the base of the floor of the floor, they need to be cleaned with a skin, and if you notice more serious defects, some kind of pit, cracks, cracks, then they should be sealed with sauced cement mortar.

Stage 2. Laying Waterproofing

As a waterproofing material, you can take a conventional polyethylene film with a thickness of at least 200 microns, and you can use the Special Material "Cellon", which besides what reliably protects the base of the floor from moisture, has also high heat and sound insulation properties.

In principle, it does not matter that you select - and polyethylene, and "Cellon" will provide your screed that level of strength that she needs.

The film is stacked directly on the purified surface of the floor with a solid web, no joints and points are allowed. The size of the material must slightly exceed the area of \u200b\u200bthe room so that the part of the film goes to the walls by about 20 cm.

Stage 3. Wall Preparation

Yes, you are not mistaken! The walls also need to carefully prepare before laying a semi-dry screed. For the insulation of walls, columns and other architectural elements, a damper tape is used, which has a sticky irons. Such a tape is glued throughout the perimeter of the room, and its upper border should pass a little higher than the future screed.

Thanks to the insulating tape, the screed during drying will not crack, they will not be terrible and the consequences of compression processes of walls, and you can even completely eliminate the variety of damage to the screed in the places of its connection with the walls.

At the end of work on the installation of a semi-dry screed, the remaining ribbons protruding beyond the surface of the floor is simply cut off by a stationery knife.

Stage 4. Lightach

This is the most difficult stage of all, because here you have to make the most accurate calculations and measurements. Although if you have a laser level, then with this work you will handle one or two.

So, proceed. To begin with, install a laser level in the center of the room. Then, choosing an arbitrary place from any wall, tighten the screw to the floor (the length of the self-press should be at least 8-10 cm). Setting the rule or something else similar to it on the self-tapping screw, make a marker mark in the place where laser ray Crosses the rule ("Cub" needs to be done right on the rule).

Next, tighten the second screws at the opposite wall and put the rule on it. Check that the laser beam intersect the rule in the same place where you draw a mark. If the lines do not match, simply adjust the self-screwing with it by twisting or on the contrary, the unscrewing until your knot is to be flushed with a laser line.

Thus, it is necessary to "place" the entire area of \u200b\u200bthe room, setting at least 10-15 screws: at the walls and in the center.

Now you can proceed to the placement. You can make them right from the cement mortar (if your screed is not too thick) or use special T-shaped slats that are sold in every construction store.

Consider more both options.

Cement mortar lighthouses

Take a little solution and lay it between two self-drawing in the form of a small ridge. At the top of the cement heap, put a strip of wide scotch and press the mixture with the right to stop in the screw. The lighthouse is ready, but it is still quite unstable, so you need to give it time for drying. After the solution is completely dry, you can remove the tape.

T-shaped beacons

If you decide to take advantage of this method, then the distance between self-draws should be about 50-60 cm. It is necessary for the rails not to survey under the rule.

Adding, if necessary, self-tapping, prepare all the same cement mortar. Then lay it right on the screws in the form of small heap, and on top. Install the T-shaped rail with a smooth side down. Press it until it stops and check the correctness of your actions. Thus, put all the lighthouses on the bunch of cement and wait until they dry.

Preparation of solution

There are already ready-made dry mixes for a screed floor, but if you do not have to buy them, it is quite possible to limit the solution of its own manufacture.

To do this, you will need:

• Portland cement M-400 brand
• River sand
• Fibrovolokno
• Plasticizer

Preparing a semi-drying material in a mixer and in any suitable size.

First, the river sand (about 120-140 l) falls asleep (about 120-140 l), then fibrovolok (on this amount of sand is about 130 g), then cement (50 kg) and water (14-17 liters). If you have no such high capacity at your hands, you can take a smaller one, but at the same time observe the following proportions:

• cement - 1 part
• river sand - 3-4 parts
• fibrovolok - 600-800 g per 1 cubic meter. m mixtures
• plasticizer - 1 l per 100 kg of cement

Water you need to add "to the eye", just do not overdo it. To check the quality of the mixture, take it a little in hand and squeeze into a fist. If there is no moisture after that, there is a lot of water if the lump turned out to be dense and collapsed after the solution of the fingers, it means that the solution is cooked correctly.

From, of course, a lot, it's easier to buy a finished semi-dry knauf tie, which meets all quality standards and not once again not bother.

Laying semi-dry screed and its grinding

So, everything is ready for you to start finally laying the solution. Lighthouses are exhibited, the mixture awaits not wait for its o'clock, and the mood is combat. So it's time to fight!

Filling in a mixture small plot Between two lighthouses, start to push it with the help of the rule on yourself and left-right. If not very clear how it is, see the video of the plot, in which everything is intelligible.

Consider the lighthouses will remain in the solution forever, so do not be afraid to close them with a mixture and remember the main thing - the value of the total thickness of the screed must be no more than 40 mm, and its minimum thickness on separately taken areas should be at least 30 mm.

Having finished laying the mixture, it is necessary to immediately proceed to its grout. If the room is quite large, then all the work on floor alignment must be carried out at least together: one places the solution and levels it, the other - produces grouting fresh screed. Grout must be held no earlier than 20 minutes and no later than 6 hours after the start of the screed

Grinding (grout) is carried out with the help of a special culinary machine equipped with aligning metal discs of different grainability. At the same time, this device raves the mixture, making it more tight and stronger.

Approximate cost of installing floors using a semi-dry tie

The cost of the mechanized screed includes: the cost of materials, tools, the delivery of the mixture to the destination, its rise to the floor, payment of the wizard, rent (if necessary) the grinding machine.

This table shows the prices for a semi-dry tie, depending on its thickness and floors of the building:

If all these works you will perform yourself, then the semi-dry band of the floor, the price of it or rather, will be approximately 5-6 times lower.

As you can see, align the floor with your own hands. The main thing is to know the basic requirements for one or another screed. With a semi-dry, you now definitely cope!

During the construction of the house, workers need to perform a large amount of work and apply a variety of technologies. The construction of walls is carried out from a variety of materials, and interior decoration produced by itself unusual ways. A distinctive feature of works is that the result of this stage of the construction of the hosts is not only seen every day, but also feel under their feet. All this proves the importance of the correctness of the foundation.

Types of floor tie

1. Classic method. Wet screed from cement-sand or concrete solution. This method of alignment of the base is used in construction for a long time. Conducting work on a wet tie requires a large amount of time, since the material must dry.
2. Wet screed. It is performed using slabs from chipboard, OSB, DVP or plywood. The cost of such works depends on the initial quality of the foundation. The worse it is, the more material will be required for leveling. The strength of some plates does not allow them to lay them in one layer, which also indicates the need for repeated leveling.
3. Semi-dry tie. This method is similar to the implementation of the classical base, but is fundamentally characterized by a minimum amount of water in a sandy cement mixture. It does not pour, but falling asleep on the floor. To increase strength to solution, polypropylene fibers can be added, which play the role of the reinforcing frame. Semi-drying floor screed, the execution technology of which will be discussed below can be carried out in several ways depending on the drops in the base plane.

Advantages of semi-dry floor tie

Disadvantages of semi-dry tie

1. Prior to the start of work on the seal of the material, the area of \u200b\u200bthe room is very dirty.
2. When using special techniques, the cost of repair increases.
3. The price for 1 m 2 semi-dry tie depends on the height where the work is carried out. For example, the cost of gender on the 1st and 20th floors is different by 30%. This is explained by the need to raise all materials and equipment.
4. Semi-dry solution is very difficult to move manually.
5. Often, builders do not know the exact amount of water in the mixture, so pour it is not enough or too much. This leads to a violation of technology and the receipt of an unexpected result.
6. The semi-dry tie needed to be thoroughly tumped, otherwise it will constantly crumble and even creak under their feet.

Types of semi-dry tie shops

1. Screed without a substrate. The material is placed on a bare concrete base.
2. With polyethylene substrate. The solution in this case does not concern the rough base and walls. This type of screed is also called "floating".
3. With thermal insulation substrate. In the role of an additional layer, the plates are most often mineral Wat.. This is especially true on the first floors of houses and in private buildings.
4. With noise insulating substrate. Itself sand-cement mixture Bad misses the sound. In addition, it is possible to use foamed polyethylene or membrane noise.
5. With they give the floor greater strength.
6. With fiberolok. Such a floor is able to withstand very large loads.

Some of these species can be combined with each other, it turns out the optimal floor screed for this room. Technology device semi-dry screed is divided into several stages.

Preparation of the base for semi-dry tie

1. Before starting work, the base is fully cleaned. The garbage is cleaned by a broom, and small particles - a vacuum cleaner.
2. The zero level is exhibited. It helps accurately measure the height of the base.
3. If necessary, large floor defects are sweeping. Semi-dry screed, the technology of laying which allows you to create a flat surface, still does not guarantee the penetration into all the flaws of the base. The remaining emptiness can subsequently cause the formation of cracks.
4. The entire surface of the floor is necessarily ground. It helps to bore a new layer with the old. The primer dries several hours.

Installation of beacons and waterproofing

Lighthouses are called guide elements that serve as guidelines for the horizontal level of the future floor. They help the builder lay out the solution of the desired thickness.

Waterproofing for semi-dry screed is not required, but the walls and columns need to be protected from the solution. This is done to compress and subsequent expansion of vertical structures do not affect the state of the floor. Above the level of the future screed on all surfaces is pasted by a damper tape, it will prevent the tissue of the material. After drying the floor, it must be removed with a sharp knife.

The semi-dry band screed, the technology of the device of which implies the mandatory availability of lighthouses, allows them to be executed in several ways. One of them implies the guidelines on two opposite walls. Lighthouses consist of a rammed mixture. Their height is accurately measured from the zero level.

Lighthouses can also be strips fixed on self-drawing or concrete. Their level is usually above the base of 8-10 cm.

Such beacons are installed by strips every 180-190 cm if a two-meter rule is used. With a decrease in its length, the distance between the guidelines becomes shorter. Their height is measured by thread, stretched between the walls from the first lighthouses.

In the process of alignment of the floor, lighthouses should not shift. To do this, they need to be securely fixed. As necessary, the future floor is reinforced.

Preparing a solution for semi-dry tie

This process can be carried out in several ways. The easiest of them consists in breeding water with a finished dry mix. In this case, you just need to follow the instructions.

If there is no finished mixture, then it can be done independently. For this you need to mix one part of the cement and three - purified coarse sand. If necessary, a plasticizer and fibrovocol are added. Everything is placed in the concrete mixture, and water is gradually there. A semi-drying floor screed, the laying technology of which will be considered below, implies the solution of a certain consistency. Such that when compressed in a fist, it forms a lump, but does not distinguish water.

Semi-dry screed with fiber solid withstands very large loads. The desired amount of solution is obtained by constant adding dry components and water.

Device semi-dry floor tie. Concreting technology

After graduation preparatory work You can proceed to direct concreting surface. The semi-dry band screed, the technology of which provides for the performance of work with several builders at the same time, begins with a fall asleep mixture between the guides. After that, the material is leveled by the rule of a little above the beacons. The mixture is drawn over. As it is necessary, you can perform wave-like movements by rule, it will help to remove the excess material to the adjacent zones.

I have not started to dry, it must be tamped and wag. All this must be carried out within 6 hours after alignment. A special machine is used, which allows you to make the surface of the floor smooth and smooth. During the operation of the equipment, the material is a little settling.

The material processing is ends with a control check of horizontal and even the resulting floor. The level should be definitely clean.

In order to gradually dry, the floor surface is covered with polyethylene for 12 hours, it will help to prevent too fast evaporation of moisture. After that, the gender dries at least four days.

Semi-drying device and work technology

Conduct work on independent concreting floor possible. The only difference is to use instead of a typewriter for aligning the usual grout of a large area. For the convenience of working with it, the floor can be filled with small segments. The technology of the device semi-dry screed provides for the rapid and sequential execution of all stages of the process. Therefore, one person can knead the solution, the second is to lay it and smooth it, and the third is to rub.

The components of the cost of the paper screed

When ordering the screed in the construction company, its final cost will be consumed from expenses on:

• concrete and dry mix;
• transportation and lifting of all materials and equipment;