The technology of laying osb on a concrete floor. OSB laying on concrete floor

Features of choice

OSB laying on concrete floor

See also: Concrete well construction

Processing material

http://youtu.be/Wcfg5cTWiaw

Benefits of using

See also: building strip foundation for country house

Page 2

• Reinforcement
• Manufacturing
• Tools
• Installation
• Payment
• Repair

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How to make a floor from OSB: features, laying technology, recommendations and reviews

OSB board is a modern building material that, according to its characteristics, has successfully replaced chipboard and plywood. These oriented strand boards are used both in the construction of frame houses and for insulation. Also use these products for the arrangement of rough coatings. OSB flooring is a great opportunity to level a concrete screed or a wooden floor inexpensively and with minimal effort.

What is OSB?

Oriented strand board consists of several layers of wood chips pressed and then glued with special waterproof resins. Glue it in three layers. On the outer sides chips are placed along the length, inside - perpendicularly. This solution gives the new building material a special strength.

Types of OSB boards

V construction works oh, and also during the repair, several types of these plates are used. So, OSB-2 is a panel that has a very low moisture resistance. This solution only suitable for internal works in dry rooms.

OSB-3 is a more versatile board. Among the characteristics - high resistance to moisture both indoors and outdoors. Also, the plate has a huge margin of safety.

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

Which slabs are suitable for the floor?

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

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

If you plan to build a floor on logs, 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. Experts with experience recommend opting for products from Canada or Europe. As for the size, it is considered standard for this material - 2.44x1.22 m.

The main functions of OSB boards

Such panels are used to create a smooth and maximum solid foundation under various types of modern finishing floor coverings. It can be parquet, ceramic tiles, laminate, carpet.

This perfect option for floor leveling. The plywood that was used before does not have such high performance. If there is a choice - plywood or OSB floor, then the latter will be more durable.

Advantages and disadvantages

Among the advantages of such a building material, a sufficiently high density is also distinguished - even a large rat will not be able to damage this base. High resistance to moisture allows the material to be used anywhere - you can lay these sheets in baths, as well as in various unheated rooms.

Laying OSB on the floor does not require special skills - absolutely anyone can do it home master, which is a major advantage. To equip the rough base, it is enough to be able to use the usual building level, a hacksaw and a hammer.

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

Installation of OSB on a concrete floor

Imagine such a situation - there is a terribly curved concrete screed. For alignment, you can apply the following scheme. The technology is relevant for any concrete surfaces.

The first step is to clean 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 with mounting adhesive. Clean surface - high adhesion.

Then the cleaned base should be covered with a primer. This will help the adhesive adhere better to the concrete surface. In addition, the primer forms a sufficiently dense film on the screed, which will prevent it from dusting during use.

Then they begin to lay out the OSB boards on the floor. If necessary, cut the pieces to the desired size with a jigsaw or circular saw. From the wrong side, parquet glue is applied to the material. It should be chosen only on a rubber basis - it is more effective for solving such a problem. To ensure that the adhesive can be applied as evenly as possible, experienced professionals recommend using a notched trowel.

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

In the process of laying between the sheets, it is necessary to leave expansion joints. Their width should be about 3 mm. A 12 mm seam is also left around the entire perimeter of the room - between the slab and the wall. These are special deformation gaps, which, 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 dust and various debris accumulated there. Expansion joints are filled with mounting foam. The surfaces are then allowed to rest and dry for 4 hours. After that, it remains only to cut off the foam, and you can lay the topcoat.

Installation of OSB on a wooden floor

So, before you do the installation work, you should again prepare the base base. It is very important to pay attention to nails, if any. They must be drowned deep into the board. For this, a regular hammer and a steel bolt are best suited. The diameter of the bolt must be equal to the diameter of the nail. If batten during the operation, it managed to become unusable, it must be restored with a planer.

After that, you can proceed directly to the installation of OSB. 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. For fixing plates, it is best to use self-tapping screws, the length of which is 4 cm. The interval of fasteners is approximately 20-30 cm. The self-tapping screws are recessed into the plate.

After the installation is completed, it is recommended to grind the joints. This can be done by hand, but if the area of ​​\u200b\u200bthe room is serious, then a grinder will do. If needed maximum effect, then it is worth arming yourself with a vibration machine, which is equipped with a grinding grid. It is worth processing the plate with the utmost care - you can easily make recesses on its surface.

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

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OSB laying on concrete floor

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OSB laying on concrete floor

OSB boards are a relatively new building material that is widely used in construction and repair work. One way to use it is 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 an OSB-covered floor to have a long service life, the fixing of the material must be carried out correctly.

OSB board inexpensive, quality material for flooring. It is durable, waterproof and lightweight.

Features of choice

Now on the market there is a large selection of OSB, which differ in their properties and characteristics.

In order to make the right choice, you must follow the following recommendations:

• the highest quality is considered to be the products of Canadian and European manufacturers, it is produced according to modern technologies and meets the E1 standard (environmental safety);
• it is best if OSB-3 is laid (fastened) on the floor;
• on 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.

The size of a standard OSB board is 2440x1220 mm, so the required number of them is calculated based on the location so that a minimum of waste is obtained. With help circular saw easy to cut required size, it is not recommended to use a jigsaw for this, since it is not always possible to get an even cut with it.

OSB laying on concrete floor

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

After the OSB is laid on the concrete floor, you can install Decoration Materials: tiles, linoleum, laminate, parquet board.

The main functions of OSB on concrete floor:

When calculating the number of slabs, it should be taken into account that the losses when cutting the slab are 7-10%.

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

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

To ensure maximum rigidity and resistance to deformation, it is better to use OSB-plates with a thickness of 8-10 mm, laid in two layers. It is necessary to lay the layers with an offset, they are attached to each other with the help of spiral nails or glue.

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

Processing material

OSB boards can be used as an independent floor covering, or 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 the laying of roll materials is carried out, then it is necessary to ensure a smooth transition at the joints, the plates take a minimum thickness. They try to make gaps from the side of the wall, they are treated with an elastic sealant.

To cover the floor with tiles, the base must be completely fixed, so OSB must be laid especially carefully. The tile is placed on a special adhesive, which provides reliable connection ceramics and wood.

Laying plates under the laminate does not imply special requirements, only at the joints the surface must be perfectly flat.

Benefits of using

1. Simplicity. No special skills and tools are needed, installation can be done by anyone who has minimal skills in construction work.
2. Convenience. Plates have a large area, so they cover 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 heaters.
3. Cheapness. The cost of 1 sq. m of this material compares favorably with similar materials.
4. Reliability. They perfectly hold fasteners, do not change shape and do not deform, they withstand the load well.

OSB boards are very popular due to their characteristics, therefore they are very widely used in construction. Depending on the thickness, the plate can perform a load-bearing function even in a damp room. OSB boards consist of stacked, ordered fine wood particles held together by a binder. In that step by step guide we will show you how to properly lay osb.

Since the composition of the OSB board is such that all its elements are laid in the same direction and are beautifully aligned, the OSB even in its raw state looks harmonious and partially even modern. In addition, the modern development of technologies in the industry makes these panels particularly strong and resistant to external environment. Thus, the OSB panel is used for various purposes. Thin versions of osb slabs are used for the construction of partitions or wall decoration, also for cladding pitched roofs. Thicker slabs are used for arranging floors.

Tools:

• level
• folding ruler or tape measure
• pencil
• forceps
• screwdriver
• manual circular
• hammer
• bracket for laying laminate
• jigsaw
• japanese saw
• osb plate with grooves
• waterproofing film
• adhesive aluminum tape
• soundproofing underlay
• rule
• wedges

If the floor is laid in a floating way, this means that OSB floor slabs should not be attached to the base, but only to each other. This prevents the floor from squeaking, which often occurs when the floor is made of wooden elements in a room where constant changes in air pressure and temperature. However, if the floor is laid in a floating way, it can always expand and contract freely in the direction of the walls without making annoying sounds.

Advantages of OSB boards

Manufacturers of this material produce plates in four classifications. The first OSB - 1 - these are panels that are used for the manufacture of furniture and interior decoration walls, are only suitable for use in low humidity.

OSB - 2 is used in dry rooms, but already has load-bearing properties.

OSB-3 boards are laid in damp rooms as bases. They are ideal for floating laying in an attic or concrete surface.

The fourth class of OSB are panels that can provide strong load-bearing properties in all areas, even in a damp room, such as a bathroom. These panels can be used if the joists in the attic are spaced far enough apart to create a solid floor. If the distance between the beams is a meter or more, then you definitely need to use OSB - 4. Starting from a distance from the beam of about one meter, you should use these panels anyway.

OSB 3 - a universal option for the floor

OSB of the third class is ideal for flooring in your home. The material has many positive properties, but pay attention to the weight of the sheets. If you want to make a floor on the second floor or attic, it will be difficult or even impossible to raise this material to a height on your own. Depending on the thickness of the plate, the weight can be from 590 to 610 kilograms per cubic meter.

Sizes of plates that are on sale

• Slab size with groove and tongue 2500 x 625 mm - 12, 15, 18, 22 and 25 mm
• Size with straight ends 2500 x 1250 mm - 8, 10, 12, 15, 18, 22 and 25 mm

Preparatory stage

Tip: it is optimal to choose not only thicker OSB boards - 22 or 25 mm in size, but also, if possible, made with m grooves and a spike for connection. In this way, you will get higher strength for a floor that will withstand greater weight loads.

Before starting work, check the beams and boards for damage caused by worms or rot. If you lay a new floor, then you will no longer have access to these elements of the house and the opportunity to change or change something.

Tip: When buying glue, pay attention to Note: Formaldehyde-free glue. This is a more environmentally friendly option, and it should be taken even for non-residential premises.

floor leveling

An old floor or a concrete floor that has served for many years will often be slightly uneven, so it must be leveled with a leveling layer before laying the OSB panels. Otherwise, the slabs will sag or sag over time. Perhaps even with a heavy load on the floor, they can break.

Now in every hardware store you can buy various mixtures, including expanded clay or something similar.

Before leveling, you must install guides that are covered with loose material and leveled with a rule or a high level, or finally with a flat board. In the end, you need to make sure that everything is level and tightly packed, without holes and protrusions.

When leveling you will need:

• fine expanded clay or leveling compound
• guides
• rule
• level

Especially if OSB is laid on the old floor from wooden planks between them requires a vapor barrier. It's just a strong plastic film that you stick with aluminum tape. The film should protrude well on the wall so that it will later be higher than your new OSB floor. After completion of all work, the film will be hidden behind the plinth.

Soundproofing installation

If you are not laying OSB on the ground floor, then you need to additionally lay soundproof material. Otherwise, your walking on the floor will be quite audible in the room below you. Soundproofing is sold both in rolls and in small mats, it is not very expensive, so you do not need to omit this step.

Laying slabs - first row

Before laying OSB panels should have time to adapt to room temperature, also - like laminate or parquet. Therefore, it is recommended to store the boards indoors at least 24 hours before laying, so that they can acclimatize.

Start laying from the longest wall of the room - from the left corner. At the plates that lie against the wall, the lock is cut off from the wall - using a circular saw. Then the sheets are aligned along the wall, wedges are installed at a distance of about 80 centimeters from each other - between the plates and the wall to set a gap of 1.5 to 2 centimeters - this is an expansion joint.

Tip: If you want to glue the floor, then first you need to cut all the sheets for one row, and then apply a thin layer of glue to the joints of the groove and lock. With the help of an iron bracket, the plates are shifted into each other.

The last sheet in the first row should usually be cut off. To prevent board seams from falling directly into one row, the cut board is used as the first element in the next row. Thus, a composition similar to brickwork. Always use enough wedges so that the floor is clamped on all sides.

If the remaining piece of sheet that lies in the next row is less than forty centimeters, it is better not to use it, but to find a more suitable half of the sheet.

Curing and removing glue

Leave the floor alone for at least 24 hours to allow the adhesive to dry. Then you can remove the wedges near the walls. If the finish coating - laminate, parquet, linoleum, etc., will not be laid on the OSB, it should be painted or waxed for wood.

Tip: use good quality wedges, preferably plastic. Wooden wedges are partially split already at the first correct blow with a hammer. And soft fibers can't hold a big floating floor.

In a non-residential attic, you don't have to worry about installing a floating floor, you can simply screw the sheets to the base.

If possible, drill holes for the screws and go through the holes with a countersink. This way the screws will be sunk into the OSB sheets and you can't hit them with your shoes.

Tip: If the room is not heated, you should use screws that do not rust due to high humidity air. Stainless steel screws are ideal for this purpose because they can be removed even after several years of operation in a humid environment.

OSB double decking

In the case of a not very strong base made of rotting boards or beams, or with a large distance between them, experts recommend using two layers of OSB boards. For example, sheets with a thickness of 10 or 12 millimeters are taken, the first layer is screwed on, and then thinner sheets - 8 millimeters - are attached in the opposite direction. In this case, it is necessary to carefully ensure that the seams of the plates never coincide.

An additional advantage of this method is the price, since sheets with a straight end cost less, and the thin sheets still save money. Although the floor in this embodiment will turn out to be thinner than the floating one, it will be much more stable and stronger.

Ceramic tile on wood flooring is the ideal solution for very damp environments such as bathrooms and kitchens. But what if the base is a wooden floor, and, moreover, it is not mounted on a reinforced concrete slab? But, as practice shows, it is possible, but then is it possible to lay tiles on GVL or on OSB plywood. And the answer is simple and definitely positive, because it is these materials that have high technical performance.

For technical reasons, laying tiles on a wooden floor is undesirable or impractical. A wooden floor is prone to permanent deformations during its service life. Each board relative to the next one can make small movements, which will lead to cracking of the adhesive layer and damage to the ceramic coating. In this article, we will look at how to properly lay tiles on GVL and plywood, and at the same time, so that the coating is durable and reliable.

Wood, as a natural material, is prone to constant expansion and contraction. Moreover, this happens in all directions. In addition, it is prone to decay and debate, leading to its destruction during operation with a lack of ventilation and a constantly humid environment. But even these factors do not bother people before they want to lay ceramic tiles on wooden base. But then on such a floor, in general, nothing waterproof can be put. But do not despair, because ceramic tiles can be laid on plywood, just like on a reinforced concrete base, if you follow the technology and properly prepare the surface. Today, there are several ways to lay tiles on a wooden floor. But the most common is laying tiles on a GVL floor or laying tiles on OSB. Because these two materials have excellent strength and elasticity parameters. But before laying the tile, you should familiarize yourself with the correct technology for leveling the surface.

Floor preparation

Today, there are many technologies for laying tiles on a wooden floor, each of which has its pros and cons. Although, the laying process is in any case the same and standard, a thin layer of adhesive is spread with a notched trowel and the tiles are glued to it according to the level. Preparation of a wooden floor for tiles can be done in two ways:

• dry;
• wet.

But regardless of how the surface for mounting the tile is leveled, there are common operations in the preparation process. These include:

Everything, after carrying out all the above manipulations, the draft base can be declared ready for further work.

Leveling the zero plane of the floor with OSB plywood

Is it possible to lay tiles on osby? Yes, but certain conditions must be met. One of the most reliable ways to level the floor for laying ceramic tiles on a wooden base is OSB plywood. It is a plate of oriented and pressed glued chips. This material has sufficient strength and is able to withstand heavy bending loads. Sheets with a thickness of 12 and 20 mm are widely used. The advantages of the plate should be attributed first of all:

• High fire resistance. The stove is impregnated with a special composition that does not burn well, and in the absence of a catalyst it is not combustible at all.
• OSB board repels water well. Due to the strong and solid impregnation, moisture cannot be absorbed into the material, thereby preserving what is under it from it. Ceramic tile on OSB will lie firmly and not warp, which is commonly seen on shock-absorbing surfaces.

So. We return to the technology of how to lay tiles on a wooden floor in the bathroom. OSB slabs can be laid directly on floors, but the distance between them should not exceed 50 cm. The slabs can be laid not only on logs and floors. In the case of careful processing and complete prevention of the rough plank floor, they can be laid directly on the old boards.

It is important to know that it is better to use already aged, but very strong floorboards, because they are already less prone to drying out and deformation when temperature and humidity change.

At this stage, the maximum leveling of the base is carried out by laying plastic substrates in the necessary places. As a leveling of the floor for fixing OSB boards, shingles can be made in places where it is required to raise the level. Plus, some distance between the draft boards and slabs will be a passage for ventilation of both the boards themselves and the OSB sheets. In addition, to improve ventilation, it is recommended to drill holes in the boards with a uniform pitch. This condition allows you to confidently answer the question of whether it is possible to lay tiles on an OSB slab.

tile laying technology OSB plate requires a solid base, so the plates must be laid in two layers. Moreover, each top should overlap the bottom by 50% with a shift in both directions. This arrangement of sheets will provide the required floor strength in all respects:

• will withstand point loads well;
• the base will perfectly withstand the forces generated over a large area.

A double layer of OSB plywood will provide a solid surface for laying ceramic tiles, and at the same time will not interfere with the free movement of the subfloor boards.

Important to remember! In order to lay a tile on an OSB slab with high quality, it is necessary to ensure its possibility for thermal expansion. Therefore, a certain distance (3-4 mm) should be retreated between the sheets to provide free opportunities for the plates to change their geometric dimensions under the influence of temperatures. This space must be filled with a shock-absorbing compound; a sealant is well suited for this. In the same way, the distance should be retreated from all walls around the perimeter.

After fastening the plates with self-tapping screws, you can proceed to the process of installing the tile itself. But at the same time, for laying tiles on a wooden floor, you will need not a simple cement-sand adhesive, but a two-component adhesive composition, which, when solidified, has some elasticity, which will ensure that the ceramics are firmly attached to the OSB floor.

To increase the reliability and durability of wood flooring, the surface should be highly permeable before tiling, and allowed to dry thoroughly. Video by

Leveling the floor by screeding on OSB plywood

If you want to level the base from significant differences in level, then the above technology for laying tiles on a wooden floor will be the ideal solution. But to perform the screed, you will have to live through a layer of waterproofing. It can be an ordinary polyethylene film with a thickness of at least 150 microns. In order to lay tiles on a wooden floor with high quality and no mold formed under the base of the screed, the film must be laid with an overlap of at least 15 cm, followed by mandatory gluing of the seams with strong adhesive tape, and the same overlap must be made on the walls. The thickness of the screed should be between 2.5 and 3.5 cm. Less and more is not recommended.

A thinner layer will become a weak link in the design, a thicker one will become quite cold.

Today, GVL is gaining more and more popularity - gypsum boards with wood fibers as a filler. The resulting material has better properties than conventional drywall:

• More durable due to the reinforcement of the structure with wood fibers. Also, the material acquires elasticity, which cannot be said about drywall.
• Due to the use of all the same natural materials, GVL is an environmentally friendly product.
• Able to stand much longer in humid environments without changing its parameters.

GVL slabs or sheets are available in two variations:

• Single sheets with a thickness of 12 mm, then two layers of plates will be required to lay them on the floor. Laying tiles on GVL will provide you with a solid and reliable foundation for many years to come.
• Double sheets with a lower shift, and along the edges with the formation of a lock for a more durable joining of the elements to each other.

In the case of leveling the floor with GVL, it is also recommended to use strips cut from this material as substrates, attached to the floor with galvanized self-tapping screws. Between sheets it is recommended, as in the case of OSB plywood, to leave a distance of up to 3 mm for temperature compensation. The gap is filled with sealant.

Stages of laying tiles

Laying tiles on GVL slabs can be done using ordinary tile adhesive. In this case, it is recommended to spread the solution with a thin layer with a notched trowel over the entire surface. Each laid tile should be carefully measured with a level, and favorite crosses should be inserted between the tiles in the seam. After installing the tile, grouting can be done with any fugue. .

Laying tiles on a prepared base is no different from the process on a concrete floor, so it starts with markings. Tile on wooden floor can be laid both flat and diagonal, but first you need to mark the initial position of the first line. After applying graphic markings and an indicative drawing in case of use colorful tiles, the whole tile should be tried on (laid over the entire area in accordance with the figure) in order to pre-cut the necessary pieces and

A floor made from OSB panels is an excellent base for any finishing layer. Parquet, panels or ceramic tiles can be laid on it. OSB sheets, they are also OSB and OSB boards or sheets. This material has a high mechanical strength and resistance to moisture, which is also characterized by good thermal insulation and sound insulation. The advantages of the chosen solution include relatively simple installation. In this article, we will discuss in detail how to properly lay OSB sheets on the floor.

In what cases are OSB sheets laid on the floor

There is a variety of floor covering materials to choose from, as well as floor smoothing. Traditionally, mineral mixtures are used in residential premises: cement grade 400 with sand or ready-made dry mix. This achieves the reliability and durability of a rough surface on which decorative flooring can be laid.

However, the use of a concrete screed is not always possible, and special solutions with a leveling effect are not cheap. An alternative to both materials is OSB floor board, which provides allowable limit strength and easy handling. Although, such a solution will also not be cheap. It should be applied under the following conditions.

• The base of the room is well insulated and does not allow pouring concrete.
• The dwelling is located in an area with a cold winter climate, which forces additional insulation of the cement-concrete floor with an OSB layer or the creation of an artificial void from the crate and insulation.
• Noticeable irregularities (chips, holes) that require alignment before facing with designer materials (linoleum, carpet, etc.);

In favor of OSB is its resistance to rodents and mold, relative immunity to stress and friendliness to all types of finishes.

Not only a concrete floor, but also wood flooring, wooden and metal carcass, as well as other types of sufficiently strong foundations.

The choice of thickness of OSB sheets when laying on the floor

Manufacturers offer material in standard sizes, but there are limitations. So, the size range in length is 244-280 cm, and in width from 60 to 250 cm. From the point of view of installing the floor, the thickness of the slab, which varies from 6 to 24 mm, is the most important parameter that affects the reliability and durability of the coating. The greater the thickness, the higher the load that the OSB board can withstand. But as this increases, the height of the room will also decrease, so it's important to balance strength and floor elevation. In addition to the above, with an increase in this size of the slab, the cost of repairs increases.

Many years of experience in application and calculations show that for installation as subfloors on a crate, it is necessary to choose the thickest sheets that are available in production - 22-24 mm.

With direct attachment to screed or concrete, it all depends on the condition of the cement surface. If, it is without significant irregularities and defects, then 10 mm panels are sufficient, otherwise, the acceptable thickness of the plates increases to 18 millimeters.

When the OSV surface is conceived as a front surface, 22 mm sheets will be needed. Since they will be the best thermal insulation and slightly deform under loads, which will allow the paint and varnish top coat remain solid and durable. This information is more clearly presented in the table below.

Conditions for the production of work	Recommended minimum thickness OSB sheets in millimeters
	Rough OSB floor (covered on top with a layer of decorative material, for example, laminate)	Top coat (simply varnished or painted)
Lathing of beams or log	22	24
Plank surface with finished sanding	18	22
Wavy boardwalk	22	24
Old concrete screed with significant defects	18	22
Surface filled with self-levelling compound, factory concrete slab with a flat surface	10	22

The structural data of the material is also important. The OSB-3 quality plate is used, no less. Joints can be straight or grooved. In the latter version, the joints will be additionally strengthened.

How to lay OSB sheets on the floor

The technology for mounting OSB panels on a horizontal surface is quite simple to perform and even a non-professional can handle it. The basic principle when laying floors from any material is to create a solid, even surface. When repairing floors with using OSB boards most often use three options for their installation:

• direct fastening to a cement-concrete screed;
• on the floor from old wooden boards;
• installation using a crate made of wooden logs.

All three possible methods have some nuances that must be taken into account during the production of work.

Laying OSB on a floor with a concrete surface

The method is widely used in apartments multi-storey buildings- where the base will not absorb dampness and excess moisture. This will keep the wood chip structure in its original form for a long time. The purpose of this method is to create a perfectly flat surface for decorative cladding and insulation of stone slabs.

The cement-concrete screed must be perfectly leveled before starting work. Permissible residual roughness, cracks and local potholes.

The process of laying OSB sheets on a concrete floor is performed in the following sequence:

1. The first step is to clean the working area well. You can use a regular vacuum cleaner for this. The sheets will sit on the glue and the dust-free surface will give a high degree adhesion.
2. After that, the cleaned substrate should be covered with a primer composition. This will help the glue stick better. In addition, the priming process creates a fairly dense film that will prevent the screed from becoming dusty during use.
3. Then, start laying OSB on the floor. If necessary, the plates are cut. It is more convenient to do this with a cut-off or circular saw.
4. The reverse side of the board is impregnated with a moisture-repellent primer with antiseptic properties and dried.
5. An adhesive is applied to the treated surface. It should be chosen only on the basis of rubber. For uniform distribution the mixture is convenient to use with a notched trowel.
6. Additionally, the panels must be fixed with concrete dowels. This is done to ensure and safe operation. It is best to hammer dowels around the entire contour of the plate. The distance from the edge should be kept at 5 cm, and the interval at 20-30 cm. With a perfectly aligned and strong screed, it is enough to fix it only at the corners, but this is taking into account the fact that a good adhesive is used.
7. Spacers are left between adjacent sheets. Their width should be about 3 mm. A gap of 12 mm also remains around the entire perimeter of the room. Subsequently, they will prevent deformation of the floor surface.
8. Finally, thoroughly clean the new surface. The joints are filled with mounting foam or putty if they are subsequently going to apply paint or varnish. After that, the floor should rest and dry. The foam is cut off, the putty is sanded and the cladding can begin.

Adding an insulating substrate between OSB and concrete is undesirable - such actions lead to displacement and deformation of the floors subsequently. The sheets must firmly adhere to the base with the entire surface. Moreover, high-quality rubber glue itself plays the role of an insulating, water-repellent and shock-absorbing substrate.

Sheathing wooden floors with OSB sheets

This method is widely used in old premises where the wooden floor has been preserved in good condition. The boards must be intact, not eaten by fungus and mold, and securely fastened. This method allows you to save on materials, is simple in execution and functional - the old floor will serve as a tolerable barrier to moisture, cold and noise.

The goals that are achieved when installing OSB on wooden boards are their alignment before decorative finishing in the future, the creation of a continuous, seamless surface and the strengthening of subfloors.

It is important to revise the old boardwalk. Ensure the integrity of the waterproofing to be laid under the floors. Replace decayed and rotten spans. Maximize coverage.

1. All nails must first be deeply embedded in the board. For this, it is better to use a hammer and a steel bolt. Irregularities and out of condition must be removed with an electric planer until a smooth polished surface is obtained.
2. old floor and reverse side plates should be covered with a protective layer of antiseptic.
3. Lay a layer of a vapor barrier membrane under the OSB to prevent condensation on the sheets and their premature aging. Waterproofing is grabbed for convenience with silicone glue, or shot with a construction stapler.
4. OSB is laid out and cut, as shown in the diagram, for laying in a diagonal pattern. This will help to avoid the formation of distortions and installation defects. Cut should be those edges of the sheets that will be adjacent to the walls.
5. The panels are fixed with wood screws. Screw long hardware (TN 45 or more) in rows that will fall in the middle of the underlying boards. To avoid splitting the wood along the fibers, lightly mix adjacent fasteners in a checkerboard pattern. The distance from the edge of the OSB to the row of self-tapping screws should be kept at 5 cm, the step in the row is 30 cm, and the distance between adjacent rows is approximately 40-65 cm.
6. Recesses for self-tapping screws are pre-countersinked to drown them flush. This will prevent subsequent finishing layers from being perforated.
7. Expansion joints are filled with foam if the coating was conceived as subfloors. When the OSB will act as a finishing surface, they pass a layer of putty along the joints and holes for hardware.
8. The foam is cut off after the final fixation, and the putty is leveled with a grinder.

Laying OSB on logs

Installation of a solid crate before laying the OSB boards on the floor creates a hidden cavity for effective insulation, noise insulation and waterproofing, and tilt-adjustable logs allow you to level and prepare a horizontal plane for laying oriented strand boards.

Theoretically, the full set of structural elements of such a floor consists of:

• bearing log or beams;
• waterproofing lower perforated membrane or film;
• top layer of vapor barrier (perforated membrane);
• insulation block - basalt wool or expanded polystyrene;
• reinforcing crate, which may not be;
• OSB panels.

The technology for creating such a complex structure is actually very simple to perform and can be done by a non-professional. The main difficulty is the installation of a strong supporting frame.

The first step is to install the lag. Rectangular bars are used as load-bearing wooden or polymer elements. The most popular sizes for this purpose are 75x50 or 100x75. The size is selected individually, it depends on the length of the room, the pitch of the crate and the expected load. The main thing is that the insulation layer is flush with the beams.

Prior to installation, it is necessary to prepare the base for the installation of the log. To do this, the entire surface is cleaned of the possible presence of fungus and mold, which in the future may settle on wooden structures and destroy them. Treat the surface with an antiseptic and close up large defects in concrete or wooden foundations. It is allowed to leave the maximum angle of skew of the base at 2-3 degrees.

You need to decide on the direction of laying the lag. In the room it is required to place them perpendicular to the windows, and in the passage corridors - across the movement of residents.

It is more convenient to maintain the distance between the rows of laid beams according to the dimensions of the insulating elements and a multiple of the dimensions of the OSB panels, which is about 40 centimeters. If it is planned to use tiles, then the space is reduced to 30 centimeters.

You can proceed with the installation and fixing of the log - set the level of the two most remote beams from opposite sides of the room. Pull strings between them. All remaining elements will align to this plane.

On a reinforced concrete base, the logs are fixed and adjusted in various ways: on self-tapping screws, anchors, metal corners, using a polymer construction. The most reliable and functional way is to fasten it to the anchor. Such a scheme is durable and the bars are easy to adjust in level with the help of threads and locknuts.

Installation of cross braces.

TO wooden crate logs are fastened with self-tapping screws on wood or on metal corners, and their level is regulated by substrates. At the very end of the work, transverse struts are installed, they are attached to the places where the edges of the OSB sheets are supposed to fall.

The assembled frame is treated with a primer, and underground communication is carried out in the space between its elements. Finished construction is a reliable support (average calculated withstand load - 5 tons per 1 m 2.). Now you can lay the next layers on it.

The second step is the creation of a vapor barrier. The main purpose of this material is to protect the insulation from condensation. The layer laid under the insulation will be its waterproofing from external moisture, and the layer from the side of the room will be a vapor barrier.

There are a great many varieties of materials produced for this purpose: polyethylene film, foil isol, antioxidant insulator, vapor-permeable membrane. When using budget sealed films, it will be necessary to create high-quality ventilation in the house, and the membranes must be laid correctly. The rough side should be directed outward from the insulation.

The rolls are overlapped, and the joints are soldered with a building hair dryer and rolled or glued with bituminous tape for tightness.

Step three - laying insulation. The function performed by this element is clear from its name. For proper placement between the frame elements, the insulation must be cut with a small margin for future shrinkage, then the cold will not have paths between the lags in the insulating layer.

As thermal insulation of the floor, three common materials are used:

1. Mineral wool,
   1. advantages: environmentally friendly, easy to fit, does not burn, reliably isolates the room from moisture;

• disadvantages: afraid of moisture, not cheap, requires good waterproofing.
• Styrofoam,
  • advantages: the best insulator, not afraid of moisture, does not require waterproofing;

• disadvantages: expensive, fire hazardous, requires good ventilation in the room, fixed on mounting foam.
• Expanded clay,
  • advantages: affordable, does not require laying the inner layer of the vapor barrier, absorbs excess moisture, non-toxic, non-flammable;
  • disadvantages: poor heat insulator.

After laying the insulation, another inner layer of waterproofing is added, provided that mineral wool was used.

Step four - laying OSB sheets. Installation should be carried out by analogy with fastening oriented strand panels to a wooden floor. Previously, the lower surface of the plates must be primed, the sheets themselves must be cut and laid on logs. OSB elements should be oriented so that they lie with their long side across the wooden frame. The main thing is that the edge of the board never sags, if this happens, then it is necessary to add a safety element of the crate.

You can see this process visually in this video:

Operation of OSB floors

The resulting wooden surface gives ample freedom for further imagination in decorative flooring. It must be covered in layers. traditional material, which is used for laying on floors. The facing coating applied over the OSB panels will be a protection for the chipboard structure.

It is impossible to arrange a warm floor under OSB boards. Heat will contribute to the intensive evaporation of heated formaldehydes that hold the fibers together. This will make the atmosphere in the rooms toxic. At the same time, the good insulating properties of wood will prevent heat from entering the house, which will lead to a waste of electricity.

With careful adherence to the technology of work, the OSB board will serve for a long time, the atmosphere in the house will remain healthy, and its climate will be cozy and comfortable.

Oriented Strand Board (OSB) is a relatively new type of building material. They are often used as an alternative to chipboard and plywood for flooring. Plates help to get rid of various irregularities. This increases the strength of the floor. He's getting warmer. Such a base can be used for mounting almost any type of decorative coating.

Material Advantages

The advantages of the material include:

• it has a high density;
• moisture resistant;
• the floor slab can be used to finish an unheated room or bath;
• the surface does not crumble;
• environmentally friendly;
• natural wood shavings are used in the production process;
• easy to mount;
• has a low price;
• with the help of one element, you can process a large area of ​​\u200b\u200bthe floor;
• able to withstand large deformation loads.

Classification of different types of plates

In the manufacture of the plate, pressed wood shavings are used. Waterproof resins are used for its bonding. The product consists of three layers. In the outer layers, chips are laid along the surface of the material. In the inner, it is perpendicular.

There are 4 types of products:

• OSB 1 is used in packaging production and in the manufacture of furniture blanks;
• using OSB 2, internal rough work is carried out;
• OSB 3 is a moisture resistant material used for interior and exterior decoration;
• OSB 4 is a high-strength material, with the help of which load-bearing structures are formed.

The flooring is laid using OSB 3 sheets. They are able to withstand the necessary load and are resistant to temperature changes. They are easy to handle and install. The material can be used as a basis for laying linoleum, laminate and ceramic tiles.

Laying material on an old wooden surface

With the help of plates, the surface to be treated is leveled. Laying OSB on a wooden floor is carried out in a certain sequence:

1. Uneven areas are found using building level. Wobbly or raised floorboards must be pulled to the joists. For this, special dowels are used.
2. The paint is peeling off the floor. grinder or sandpaper swelling is removed.
3. Products are laid out on the floor surface. Cross joints should be avoided.
4. Gaps are left between adjacent panels. Their value should not exceed 3 mm.
5. Holes are drilled in products. Their diameter must correspond to the diameter of the self-tapping screws used. The holes are located along the perimeter of the panels at a distance of 30 cm.
6. Countersinking for self-tapping screws is performed.
7. Panels are fixed with fasteners.

The length of the screws must not be less than 45 mm. To make the flooring more durable, the OSB board is laid in 2 layers. The seam near the wall is filled with polyurethane foam. After it dries completely, the excess is removed with a construction knife.

Creating a floor surface on a concrete base

Consider how to lay the coating on the floor with a concrete base. The composition of the plates includes natural wood chips. This structure of the material allows you to create high thermal insulation. In addition, the panels reliably isolate the room from the penetration of various noises.

Installation of OSB on a concrete floor is carried out as follows:

1. debris is removed from the concrete surface;
2. if necessary, it is additionally leveled;
3. a primer is applied to the concrete for better adhesion of the adhesive to the base;
4. panels are laid out on the surface to be treated;
5. an adhesive having a rubber base is applied to the inside of the plates;
6. sheets are glued to concrete;
7. the coating is additionally fixed with the help of driven dowels;
8. between the panels there should be seams that compensate for deformation changes in products;
9. at final finishing they are filled with mounting foam;
10. after drying, excess foam is removed with a sharp knife.

OSB sheets on wooden floor

Installing the coating on the logs

How to properly install panels? Is it possible to do without the use of a leveling screed when laying slabs on a concrete base?

The installation technology of oriented strand panels allows you to work in a similar way. In this case, logs made of wood should be laid directly on concrete surface. For fastening, special dowels or anchors are used. The installation step of the fasteners will depend on the thickness of the wood boards used.

In the space formed between the lags, the concrete floor and the top coating, heat-insulating material is laid. If there is moisture underneath basement, vapor barrier films or membranes are additionally added to the design.

By doing installation work you must follow the rules:

• expansion joints must remain between adjacent sheets;
• plates are laid across wooden bars;
• self-tapping screws or special nails are used to fix wood panels;
• the distance at which the fasteners will be located should not be less than 15 mm;
• their length should exceed the thickness of the applied panels by 2.5 times.

Mounting sequence

Installation of panels on logs is carried out in the following order:

1. on the foundation base or lags are attached;
2. the fastening step depends on the thickness of the sheets used (it increases with the increase in the thickness of the material);
3. a rough roll is installed on the surface of the log;
4. the main coating is laid on top and fastened;
5. its inner surface is treated with waterproofing materials;
6. a vapor barrier layer and insulation are installed on the panel;
7. fit upper layer OSB on the floor.

Features of the installation work

When performing installation work, special clothing, gloves and goggles should be used. The material itself has a fairly strong structure. But in the process of cutting and additional processing, small chips and wood dust are formed, which can damage the eyes.

Lay and cut the panels carefully, without using excessive force. Using the instructions above, you can easily lay the material yourself without resorting to the services of professional builders.