Technology for laying OSB on a concrete floor. Laying OSB - all the details of the work. Covering wooden floors with OSB sheets

More and more developers are using OSB boards (OSB, OSB) in construction. Despite some kinship with chipboard, this material is different unique characteristics waterproofness, strength and elasticity, and it is also much lighter than its predecessor. OSB is a further development of pressed wood chipboard, but rather long wood chips (up to 14 cm) are compressed into oriented strand board. Their thickness is less than a millimeter, but the chips in one layer are oriented in one direction, and the direction of the chips in each subsequent layer is perpendicular to the previous one, which significantly improves the properties of the material.

What slabs should I use for the floor?

OSB boards, the number of layers in which can reach 3 or 4, are pressed using non-mineral resins. Often, the use of formaldehyde-containing compounds in the production of OSB products makes it impossible to use boards in finishing interior spaces, but sheets made according to the OSB-3 standard do not emit harmful substances and can be installed in rooms with high humidity. OSB boards of this type are best suited for floor installation. Experts recommend doing flooring from slabs produced well-known manufacturers. As a rule, the most quality products are produced in European countries, Canada and the USA, where they most closely follow the environmental requirements for slabs.

An OSB floor can also be a finishing coating, since external texture The slab looks quite interesting.

It can be used for finishing with other materials. However, the installation of OSB itself requires a preparatory stage. How to level the floor before laying OSB boards will be described below.

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Laying slabs on a concrete surface

Quite often, in order not to lose the height of the ceilings in the room, builders lay OSB on a concrete screed. Of course, in this case the base must be level. You can ensure an ideal surface by removing the old coating and pouring a new one. Although oriented strand boards are not afraid of moisture, the base needs additional waterproofing. This will protect the space under the stove from the accumulation of condensation and the formation of fungus.

After laying on a cleaned old screed Beacons are installed on the surface of roofing felt or polyethylene and secured with plaster. To level them, a level, a tapping cord, a tape measure and transverse threads are used. Now let's learn more about how to level the floor using these devices:

1. A mark is made on the wall at some distance from the floor.
2. Using water or laser level another mark is made on it.
3. Using a cord rubbed with chalk, a horizontal line is drawn between the points.
4. The same operations are performed on the remaining walls.
5. A mark is placed at the height of the proposed screed.
6. From the horizontal to it, the distance is measured with a ruler or tape measure.
7. Dots are applied to the remaining walls.
8. The marks are connected by lines.
9. Self-tapping screws are screwed into the walls along the lines.
10. Threads are pulled from fastener to fastener on opposite walls. This will be the screed plane. Beacon profiles are installed along them.
11. Poured concrete is leveled using a rule. Its length should be wider than the gap between the beacons.

True, the solution will completely dry out 4 weeks after it is poured, but after that you can begin laying the OSB panels.

To install them on concrete base required:

• notched spatula;
• perforator;
• dowel-nails;
• screwdriver;
• hammer;
• parquet glue.

On a perfectly flat base, it is enough to lay one layer of 10 mm material. This is a good heat and sound insulator. The installation procedure is as follows.

1. In preparation required quantity OSB sheets. Their standard size-2.44 x 1.22 m. If necessary, the slabs are cut circular saw or a jigsaw, however, when working with the latter, it is difficult to ensure smooth edges.
2. Glue is applied to the OSB and spread over the surface with a spatula.
3. The slabs are laid on the screed. It is imperative to leave a compensation gap of 3 mm between them.
4. The corners of the OSB panels are drilled. Holes are also made in concrete. Dowels are inserted into them.
5. The slabs are fixed to the floor with fasteners.
6. It is enough to apply a few protective layers varnish so that the OSB floor becomes clean.

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Oriented strand base for finishing layer

If you decide to use OSB to level the floor under linoleum or other rolled material, then the gaps between the plates must be filled, but for this you need to use elastic compounds such as sealant. Laying laminate on an OSB surface does not require any additional preparatory activities. But laying tiles requires the panels to have a more rigid adhesion (tongue and groove) to each other. True, the tiles are laid on the OSB base when it is laid on the logs. In addition, OSB board is not able to provide reliable adhesion to ceramics. One more material needs to be laid on it, but more on that later. In general, making a gasket between the screed and ceramic tiles from oriented strand board is expensive and simply does not make sense. How to level an OSB floor on wooden joists, is described further.

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For beams it is necessary to choose the most even wood coniferous species(pine, spruce, larch or fir). Wood moisture content should not exceed 20%. If necessary, the beams should be dried under a canopy. For small rooms You can use logs with a cross section of 110 x 60 mm or 150 x 80 mm. If the span in the room is more than 5 m, beams 220 x 180 mm are used. It is desirable that entire joists be installed in the span. Joints are allowed as a last resort. Make them overlap better. On adjacent joists, the joints should be located no closer than ½ m from each other.

Now about the operating procedure:

1. The log wood is treated with antiseptics.
2. Roofing felt is laid overlapping on the base.
3. 4 beams are laid horizontally along opposite walls. The horizontal line is drawn using a level and a tapping cord. The distance of the logs from the walls should be 2-3 cm.
4. If the base has differences in height, then wooden pads are used to level the bottom trim. Protrusions in the ceiling are compensated by planing certain areas on the joists.
5. The lower bars are attached to the base with anchor screws or bolts with a cross-section of 10 mm. Their length depends on the thickness of the timber and the lining (another 50 mm is added to them for fixation in concrete).
6. The crossbars are attached to the lower frame using angles and self-tapping screws. The step between them depends on the thickness of the OSB boards. For slabs of 15 mm thickness, the distance between the joists should be 450 mm, and for 18 mm - 600 mm.
7. Expanded clay is poured into the sheathing or other insulation and sound insulation are placed.
8. Before attaching the sheets, a moisture-repellent membrane is laid.
9. OSB sheets are laid.

As a rule, 2 layers of oriented strand board are placed on the joists. The second layer is laid transversely to the first so that the joints do not coincide. The gap between the joints of the panels should be 3 mm. The gap between the wall and the OSB is 12 mm. The short edges of the slabs must meet on the support beams. The joints of the long sides must be supported. For better contact OSB surfaces and beams are treated with assembly adhesive. The slabs are screwed to the joists with self-tapping screws along the short edges. The fastener pitch is 15 cm. Glue is applied between the upper and lower plates. Laying the top panels ends by screwing in self-tapping screws along the edges of each sheet.

When the surface is approved on the joists, you can return to the issue of laying tiles. OSB, although they do not provide reliable connection with it, still serve as a solid base on which they are laid cement bonded particle boards. They are attached to the previous coating using PVA and self-tapping screws. It is desirable that the joints of the DSP do not coincide with the joints of the previous layer. It is also necessary to maintain 2 mm compensating gaps between adjacent slabs, as well as between the DSP and the wall. After this, you can begin laying the tile covering.

Thus, the installation of an OSB floor and its leveling using this promising building material for subsequent finishing does not differ in particular complexity from other methods of installing flooring. It can be stated that OSB boards are not the best option when preparing the base for laying ceramic tiles, but otherwise oriented strand boards are ready to fully compete with both modern and traditional building materials.

OSB boards are a relatively new building material, which is widely used in construction and repair work. One way to use it is to use it as a floor covering. Due to its properties, such a coating has high strength and low weight, it is moisture resistant and has a low price, all this explains the growing popularity of this building material. In order for a floor covered with OSB to have a long service life, the material must be fastened correctly.

OSB board is inexpensive, quality material for flooring. It is durable, moisture-resistant, lightweight.

Currently available on the market large selection OSB, which differ in their properties and characteristics.

In order to do right choice, the following recommendations must be observed:

• Products from Canadian and European manufacturers are considered to be of the highest quality; they are produced according to modern technologies and meets the E1 standard (environmental safety);
• it is best if OSB-3 is laid (fastened) on the floor;
• for concrete pavement it is necessary to use slabs up to 10 mm thick; for wooden pavement their thickness depends on the distance between the joists.

Size standard plate OSB is 2440x1220 mm, so the required quantity is calculated based on the location to ensure a minimum of waste. Easy to cut with a circular saw required size, it is not recommended to use a jigsaw for this, since with its help it is not always possible to obtain an even cut.

Laying OSB on a concrete floor

If your room has a concrete floor, then fix OSB as flooring material is a great solution.

After OSB has been laid on the concrete floor, you can install finishing materials: tiles, linoleum, laminate, parquet boards.

The main functions of OSB on a concrete floor:

When calculating the number of slabs, you need to take into account that losses when cutting a slab are 7-10%.

• leveling an imperfect floor surface, which usually has unevenness, height differences and other defects;
• reliable sound insulation, which is ensured multilayer structure material that allows you to well absorb various noises;
• waterproofing and floor insulation. The specified material has natural base, high heat-saving characteristics and moisture resistance.

If there are significant irregularities concrete covering, then the OSB board is fastened not immediately to the floor, but to wooden blocks, which play the role of lag.

To ensure maximum rigidity and resistance to deformation, it is better to use OSB boards with a thickness of 8-10 mm, laid in two layers. The layers must be laid offset; they are attached to each other using spiral nails or glue.

If the concrete floor is flat, then you can lay OSB directly on it; in this case, one layer will be enough; it is secured with self-tapping screws or dowels. Although the material is moisture resistant, partial absorption of moisture occurs and it expands slightly. To compensate for possible expansion or contraction, it is necessary to provide expansion gaps between the plates of up to 3 mm in size.

Processing material

OSB boards can be used as an independent floor covering, or they can be used as a base for laminate, linoleum or parquet.

This coating can also be used independently; for this, it is stripped, and then several layers of varnish are applied to it.

If installation is carried out roll materials, then it is necessary to ensure smooth transition at the joints, the slabs are taken to a minimum thickness. They try to make gaps from the side of the wall; they are treated with elastic sealant.

To cover the floor with tiles, the base must be completely motionless, so OSB must be laid especially carefully. The tiles are placed on a special glue, which ensures a reliable connection between the ceramics and wood.

Laying slabs under laminate does not require any special requirements, only at the joints the surface must be perfectly flat.

Benefits of use

1. Simplicity. No special skills or tools are needed; installation can be done by anyone who has minimal skills in carrying out construction work.
2. Convenience. The slabs have large area, therefore covering a large surface. Their size makes it possible to lay logs at a distance of 56 cm from each other, which makes it easy to use modern insulation.
3. Cheapness. Cost of 1 sq. m of the specified material compares favorably with similar materials.
4. Reliability. They hold fasteners perfectly, do not change shape or deform, and withstand loads well.

What to do if the room is old wooden floor, which is impractical to paint or varnish? If the boards are wobbly and? You can resort to a labor-intensive and expensive method - tearing off the old coating, making a new one, or laying fresh ones. But there is something else, more practical, faster and cheap solution– installation of OSB on a wooden floor.

This method has its own nuances that are taken into account during OSB laying. Looking ahead, it is worth saying that the basis of the technology is proper preparation grounds. Below is detailed guide, following which will allow you to achieve excellent results in terms of leveling the surface of the old wooden floor and subsequent installation decorative coatings: laminate, linoleum, etc.

Tools and materials for work

The list of necessary devices is minimal:

• nail crowbar;
• hammer;
• perforator, drill, drill bits;
• screwdriver;
• a large bubble or laser level (with a second tool it will be more convenient to identify irregularities).

Required materials:

• OSB board;
• fasteners – hardened self-tapping screws with a length of at least 45 mm;
• washers for screws (their presence is desirable, but not required).

Choosing this method of “reanimating” old wooden floors, you need to have an idea about the material used for these purposes in order to choose it correctly. The result of the alignment directly depends on this.

Characteristics of OSB boards

OSB is a construction analogue of chipboard. These slabs are more durable and are perfectly adapted for finishing. The material appeared on the market relatively recently. OSB is made from wood chips, which is laid in 3 layers. They stick together special compounds based on resins. In this case, the layer in the middle is laid perpendicular to the other 2. Due to this, the resistance of the material to loads is formed.

When marked, this parameter is indicated by a number. The lower the value, the lower the resistance to loads and damaging factors such as humidity. For example, index 2 means that the OSB board is not moisture resistant and cannot withstand intense long-term loads. And the number 4 indicates that the product can be used as a ceiling that will not collapse even when exposed to moisture.

The material for laying on the floor is selected based on the mentioned designations in order to form a smooth rough surface. You should not skimp on the quality of the OSB board. This may result in the need to lay an additional layer, which is expensive and inconvenient. The best option– OSB 3 board.

The question often arises: “Do I need a substrate for OSB?” WITH practical point vision - no. The wood itself is great thermal insulation material, and if we take into account that it fits on wooden boards, then no substrate is needed. But sometimes it is still used to achieve the maximum possible soundproofing effect.

Preparing the base

Executed correctly preparatory stage- this is more than half the success of floor leveling work. First, a thorough investigation is carried out wooden surface. This is done using a bubble or laser level. All protruding and loose parts are marked, this will make it easier to strengthen them.

The next step is to securely fix the boards. Some experts recommend doing this using dowels, but a more reliable option would be to pull loose elements with self-tapping screws to the joists. The old coating must be secured as securely as possible. To do this, you can use several fasteners in one area. The ideal result is when the “walking” floor fragments are recessed or are level with the rest.

Some recommend cleaning old layer paint with a sander. You need to know that this is only necessary in areas where there are obvious swellings paint coating. In fact, the presence of old paint is not critical; you can lay slabs on it. In this case, it is necessary to remove all large contaminants.

Attention! Main part preparatory process - fixing the old wooden covering. It is this stage that should be given special attention.

Preparing OSB for installation

Before fixing the slabs, they must first be laid on the floor in the room. In this case, 3 requirements must be met:

• There should be no straight cross-shaped seams, for which the slabs are laid staggered with an offset of 50%;

• The gap between the wall and the slabs must be at least 10 mm;
• The plates should not be adjacent to each other. The minimum gap between them is 3 mm.

Attention! The slots are needed to avoid the slabs “creeping” on top of each other and deformation of the decorative floor covering. This occurs due to the expansion of the material due to changes in humidity.

Laying process

After completing all preparatory work all that remains is to tighten the slabs with self-tapping screws to the old wooden covering and fill construction foam gap between OSB and wall. After the foam has dried, it is trimmed flush with the flooring.

The slabs are fastened with self-tapping screws around the perimeter every 20–30 cm, but this distance can be reduced. Some experts recommend preparing the holes first, but using a screwdriver can quickly and efficiently tighten screws without pre-drilling.

Leveling the floor using the proposed method is the simplest, most effective and cheapest. If you follow the instructions, you can do without the help of specialists.

Cost of work

If you decide to entrust the repair to professionals, you need to calculate how much the services will cost. The cost of installing OSB on a wooden floor is lower than the cost of installing these slabs on joists and concrete. In Moscow, prices for this type of work vary in the range of 150–200 rubles/sq.m. m.

To decide whether to lay the slabs yourself or hire craftsmen, you need to soberly assess your strengths. The following video will help with this, which clearly shows the installation process.

You can entrust the installation of floors to craftsmen and professional builders. They will make floors quickly and efficiently. True, it's far from cheap. You can save money by laying the floors yourself. Moreover, the installation of floors is not particularly complicated. You just need to carefully study the technology of their installation and apply the acquired knowledge in practice correctly, in a certain sequence. Below we will talk about how to make OSB floors yourself, choose the material, what tools you will need, and the work that needs to be done.

Pox is, let's say, a sandwich that can consist of 3 or more layers. Two (top and bottom) layers are pressed boards made from wood chips. The chips are laid lengthwise in the outer layers of the slabs and across in the inner ones. Therefore, the board as a whole is called oriented strand board. The shavings can be impregnated boric acid, wax, formaldehyde resins. Between the layers there is insulation, which can be used as polystyrene foam, as well as polyurethane foam.

OSB is mainly used in construction and furniture production. Marked and used as follows:

• OSB-1 – for the production of furniture, packaging or surface covering;
• OSB-2 – in dry rooms for the device load-bearing structures and surfaces;
• OSB–3 – in rooms with high humidity;
• OSB-4 - for structures that are subject to heavy loads, as well as those located in places where humidity is high.

OSB can be varnished on one side, covered with laminate, tongue and groove, or on two or four sides.

The plate is a rectangle with the following dimensions:

• thickness from 8 mm to 38;
• length – 2440 mm;
• width – 1220 mm;

Above we have given the dimensions of a standard slab. Sometimes you can find OSB on sale with dimensions of 1.25 meters by 2.5.

The advantages of OSB are as follows:

1. low cost;
2. light weight;
3. easy and well processed;
4. durable;
5. moisture resistance;
6. does not dry out, does not delaminate, does not rot;
7. mold and insects are not infested.

Unfortunately, there are restrictions on the use of OSB. During pressing, the chips are impregnated with resins that contain toxic substances. They constantly release environment volatile compounds of these substances. Therefore, when choosing a stove, you need to pay attention to how much of these substances is released by a particular brand of stove, and in what area it is allowed to be used.

Installation of OSB floors

There are two types of OSB flooring. The first consists of a concrete screed, waterproofing, an intermediate subfloor, and the OSB itself. The second type is waterproofing, joists, preferably a subfloor, OSB.

Materials and tools

It is better to buy a tongue-and-groove slab. From two opposite sides there should be tongues, and the other two should have grooves. This type of plate is easier to install.

The log is a timber. In construction, logs with dimensions of 5 by 5 centimeters or 5 by 7 are used to make logs. The number of logs depends on how the flooring itself will be arranged. If there is no subfloor, then the number of joists increases.

If you plan to lay the floor on a screed, you will need a lath, because the slab cannot be laid directly on the screed, even if waterproofing is placed on it. Any wooden product it must breathe, that is, absorb air and release accumulated moisture. This is why they create a gap between the floors and the screed. Otherwise, from the moisture accumulated in the product, and the tree already stores moisture in itself, and even absorbs it from the screed, it will begin to rot and, in the end, will become unusable, no matter how well it is made.

Can be used for subfloors edged board or plywood, OSB itself.

To make the screed you will need cement of at least M-300 grade and sand. You can prepare the solution yourself, but it is easier to purchase a ready-made dry sand-cement mixture in the store. Consumption per sq. m. is indicated on the packaging. Concrete mix, which includes filler, gravel, crushed stone and the like, should not be done at home. Handmade forever high quality concrete mortar don't cook.

For a better and more even floor filling, you will need beacons.

In Russia, skirting boards are usually installed on the floors. It also serves as a decorative detail and closes the gap between the wall and the floors. The gap is made specifically to allow the board to expand as the temperature rises. If it is not planned, then you can do without a plinth.

The slab is usually fastened to the timber with nails and glued with glue. This means we will need both glue and nails. When installing floors, screw nails or self-tapping screws are used.

To fill the cracks you will need wood putty. This means you will also need a spatula. You will need a wooden hammer, a mallet for holding the slabs together, and a metal hammer.

Floor installation stages

The entire installation of any floor is divided into three main stages:

• Preparation;
• main works;
• cleaning.

The last stage is known to everyone. Therefore, we will not consider it.

Preparatory stage

In the future, we will conduct all discussions keeping in mind that the installation of floors is carried out in a residential area. IN utility rooms or buildings, the floors are laid in the same way and in the same sequence as in the apartment. Only there are fewer restrictions and lower requirements. We will divide all stages into stages. Let's call them steps and present our reasoning in the form step by step instructions for the execution of work.

So, preparatory work.

Step one. Selecting the type of floor. That is, we decide whether we will lay it on a screed or on. If we choose logs, it is better to first draw a drawing of their location. It will help you correctly calculate the number of lags.

2nd step. We calculate the volume of work and draw up cost estimates.

3rd step. We are purchasing materials. When purchasing a stove, be sure to ensure that it matches sanitary standards. It is advisable to buy lumber, boards for subflooring, beams, slats already dried and treated with fireproofing and antiseptics. If you were unable to purchase such lumber, you will have to purchase an antiseptic and treat the wood yourself.

4th step. We process the slab, remove burrs and irregularities from the edges. We treat the lumber with an antiseptic and lay it out to dry. It is laid in layers. A spacer is made between the layers. It is needed to ensure that the material breathes and dries evenly and quickly. The wood is dried for at least 24 hours. The drying temperature should be +10 degrees or higher.

5th step. If the floor is being laid for the first time, then the debris remaining after construction work is removed.

If OSB is laid to replace the old floor, then the old one, of course, cannot be used as a rough floor. The floor must be dismantled carefully so as not to damage the plaster on the walls. To do this, take out the nails and remove the board, then remove the joists. We release the floor slats (each) from the grooves, move them to the side and remove them.

6th step. We install beacons to level the floor level. At least three marks on each wall. We draw a line between them. Between the wall and the line, measurements at any point should show an angle of 90 degrees.

OSB floor installation

If we install the floor on a screed, then we will have to perform several actions.

1. Install beacons for pouring the screed. The distance between them should be no more than 50-60 cm. This will make the screed more even. We check the installation of beacons with a level. If there is a slope, we level it.

2. Prepare the solution. It should not be too liquid or too thick. Fill the area prepared for the screed, level the solution as a rule, level with the installed beacons.

The screed will set in a day and you can work on it. But it will reach full strength no earlier than in two weeks, depending on the temperature in the room. The higher the temperature, the faster the screed gains strength. Hence the conclusion: heavy objects can be placed on the newly laid floor no earlier than after 14 days.

3. After the screed has set, check it with a level. If there are unevenness or slopes, pour an additional layer of mortar to level it.

If the screed turns out to be smooth, then we lay waterproofing on top of it. You can use simple roofing felt or any other material intended for these purposes. We lay the lath on top of the insulation. We would advise laying it both lengthwise and crosswise, in the form of rectangles, the sides of which are aligned. Their dimensions should correspond to the dimensions of the slab or be slightly smaller. Coat the rail with glue.

It is also possible to install slabs without using slats. In this case, coat with rubber glue concrete screed.

4. Place the slab on the rail. We take a mallet and knock down the slabs as tightly as possible. The tongue should fit completely into the groove. Ideally, there should be no gap between the plates.

5. We fasten the slabs to the lath using nails or self-tapping screws.

Video - Laying OSB on concrete

If OSB is laid directly on the joists, then it is better to install them lengthwise and crosswise. The fact is that OSB is a complex structure and it is unknown how it will behave after drying, shaking, and shrinkage. And laying the logs in the form of rectangles will reduce the load on the slab itself and reduce the likelihood of defects. All other actions that need to be performed are exactly the same as when installing the floor on a screed.

Let me give you one piece of advice. The best, in our opinion, installation of OSB floors is a design that involves the installation of an intermediate subfloor. It will give the entire floor additional strength, stability and significantly reduce the load on the coating itself, i.e. on the slab. As an intermediate floor, you can use the slab itself, plywood, or an old floor. But the latter can only be used if it is well preserved and there are no serious defects. You need to remove everything from him old paint, level, seal cracks. Scratches should be sanded, treated with an antiseptic, and only after these preparatory works can the slab be laid. Actually, both on plywood and on OSB, which will be the subfloor, all defects and cracks also need to be repaired. We have already described the remaining steps for laying the finished floor above.

Video - Do-it-yourself OSB flooring (on joists with insulation)

OSB board is a modern building material, which, according to its characteristics, has successfully replaced chipboard and plywood. These are also used in construction frame houses, and for insulation. These products are also used for arranging rough coverings. OSB flooring is an excellent opportunity inexpensively and with with minimal effort level the concrete screed or

What is OSB?

Oriented strand board consists of several layers pressed and then glued with special waterproof resins. It is glued together in three layers. On external sides The chips are placed along the length, inside - perpendicularly. This solution gives the new building material particular strength.

Types of OSB boards

IN construction work, and also during repairs, several types of these plates are used. So, OSB-2 is a panel that has very low moisture resistance. This solution is only suitable for interior work in dry rooms.

OSB-3 is more universal plate. Among the characteristics is high resistance to moisture both indoors and outdoors. The plate also has a huge safety margin.

OSB-4 is the most durable and most moisture-resistant materials. They are used only to create load-bearing structures in conditions where the humidity level is especially high.

Which slabs are suitable for flooring?

If you need to make a floor from OSB, then OSB-3 is best suited for these purposes. These boards perfectly withstand the impact of heavy furniture, various equipment and other mechanical loads.

These panels are used before laying the finishing floor covering. If on rough concrete or wooden base There are only small defects, then the thickness of the sheets in this case should be no more than 10 mm. If there are larger protrusions and depressions on the surface, then it is best to use thicker slabs. Their thickness in this case should be from 10 to 15 mm.

If you plan to build the floor on joists, then even thicker sheets should be used - the thickness should be from 15 to 25 mm.

Selection rules

It is worth knowing some selection rules. It is very important who made the sheets. Experienced experts recommend choosing products from Canada or Europe. As for the size, the standard for this material is 2.44x1.22 m.

Main functions of OSB boards

Such panels are used to create a level and extremely durable base for various types modern finishing floor coverings. It could be parquet ceramic tiles, laminate, carpet.

This ideal option for leveling floors. The plywood that was used before does not have such high performance. If you have a choice - plywood or OSB flooring, then the latter will be more durable.

Advantages and Disadvantages

Among the advantages of such building material there are also quite high density- even big rat will not damage this base. High resistance to moisture allows the material to be used anywhere - you can lay these sheets in bathhouses, as well as in various unheated rooms.

Laying OSB on the floor does not require any special skills - anyone can do it home handyman, which is a serious advantage. To arrange a rough foundation, it is enough to be able to use the usual building level, hacksaw and hammer.

OSB is a great opportunity to save money, since the price of these boards is low. One element will be enough to cover a large area. You can also highlight the high strength characteristics - even under heavy loads the floor will not deform.

Installation of OSB on a concrete floor

Let's imagine this situation - there is a terrible curve. To level it, you can use the following scheme. The technology is relevant for any concrete surfaces.

The first step is to clean it as much as possible. work surface. To do this, you can use either a vacuum cleaner or a broom. It is necessary to ensure maximum cleanliness, because the sheets will be glued using mounting adhesive. Clean surface - high adhesion.

Then the cleaned base should be coated with a primer. This will help the glue to adhere better to concrete surface. In addition, the primer forms enough thick film, which will prevent it from collecting dust during use.

Then they begin to lay out OSB boards on the floor. If necessary, trim the pieces to required sizes jigsaw or circular saw. It is applied to the material from the reverse side. It should be chosen only on a rubber basis - it is more effective for solving this problem. To ensure that the glue can be applied as evenly as possible, experienced professionals recommend using a notched trowel.

Additionally, the plate should be secured with a driven dowel. This is done to ensure a guaranteed and secure hold. It is best to hammer in dowels around the perimeter. The interval is 20-30 cm. If the concrete screed is smooth and the installation is carried out in a dry room, then OSB can be attached only in the corners, but this takes into account the fact that high-quality glue is used.

During installation, expansion joints must be left between the sheets. Their width should be about 3 mm. A 12 mm seam is also left along the entire perimeter of the room - between the slab and the wall. These are special deformation gaps that, if necessary, can compensate for the expansion of materials. The OSB floor is almost ready.

In conclusion, it is necessary to thoroughly clean the resulting surface from accumulated dust and various debris. Expansion joints are filled polyurethane foam. Then the surface is allowed to rest and dry for 4 hours. After this, all that remains is to cut off the foam, and you can lay the topcoat.

Installation of OSB on a wooden floor

So before you get started installation work, you should again prepare the basic foundation. It is very important to pay attention to nails, if any. They need to be recessed deep into the board. For this, a regular hammer and a steel bolt are best suited. The bolt diameter should be equal to diameter nail. If batten During its operation it has become unusable and needs to be restored using a planer.

After this you can proceed directly to OSB installation. First of all, pre-cut sheets are laid out on the surface. Here, as in the case of installation on concrete, it is important to remember the need expansion joints. To fasten the slabs, it is best to use self-tapping screws, the length of which is 4 cm. The interval of fastening elements is approximately 20-30 cm. The screw heads are recessed into the slab.

After installation is completed, it is recommended to sand the joints. This can be done by hand, but if the area of ​​​​the room is large, then it will do. If you need maximum effect, then you should arm yourself vibration machine, which is equipped with a sanding mesh. It is worth processing the slab with the utmost care - you can easily make indentations on its surface.

Installation of the plates is extremely simple. It turns out that all craftsmen understand how to make a floor from OSB. This new building material is worth trying. He is efficient and pleasant to work with.