What is the best way to make floors from OSB boards? OSB floor boards - all about the characteristics, types and application for floor finishing What to put between a wooden floor and a USB

OSB board is a modern building material, which in 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 oh, and also for 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 the floor?

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 is 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 - any home craftsman can do it, 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 the 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 wrong 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. Interval - 20-30 cm. If concrete screed is level, 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 it finishing coat.

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. A regular hammer and a steel bolt are best for this. 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 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. 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 heads of the screws 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.

OSB (oriented strand board) is a material successfully used in construction and furniture manufacturing. Outwardly resembles particle board, but there is a significant difference in the new material. In the production of OSB, large shavings and chips are used, laid in layers.

If odd layers are laid along the length of the slab, then even layers are laid across. The minimum number of layers is three. This crossing of chips and chips provides the material with high fracture strength. Those who are today concerned about building a house or renovating it are asking the question: is it possible to lay an OSB board on the floor?

OSB classification

OSB differs in thickness and grade of material, depending on the size of the raw material, density and quality of the resins used, which affect moisture resistance.

According to moisture resistance criteria, OSB is divided into 4 classes in Europe:

OSB-1 is the cheapest and most hygroscopic material. Used in interior decoration of residential and office premises with low humidity.
OSB-2 – increased strength and moisture resistance. The material is used to make furniture.
OSB-3 is a moisture-resistant board, used for interior and exterior work. This material, with appropriate thickness, can be laid on the floor.
OSB-4 is the material itself high class and has increased moisture resistance and strength. It is used for the manufacture of external wall panels in the construction of houses.

A quick note regarding abbreviations. OSB in Russian stands for oriented strand board. OSB in English sounds like oriented strand board. The word board is translated in two ways: both slab and board. Therefore, writing OSB and especially OSB is not entirely correct. Although similar abbreviations for oriented strand material are found even in construction markets.

Why choose OSB-3

Increased moisture resistance is mainly achieved by using phenol-formaldehyde as a binder and adhesive material. But these materials are not recommended for indoor use. Moreover, in European countries the production of materials using formaldehyde is prohibited. Manufacturers have developed binders for gluing and pressing chips based on polyurethane resins. OSB-3 Bolderaja ECO is produced in Europe, which uses these safe resins. The material complies with the European product standard EN 300. However, This material is more expensive than usual, but is it necessary to save on health?

For flooring, manufacturers produce slabs with a tongue-and-groove edge, which ensure a tighter fit of the slabs to each other. And to the question whether it is possible to lay OSB on the floor, the manufacturer gives an affirmative answer, offering consumers materials of varying thickness and moisture resistance.

On video: characteristics and features of the use of the material

Which floor to lay OSB on?

Before choosing a flooring material, you need to decide what technology you want to use to lay the floor. OSB flooring can be rough or finished. The subfloor is laid under linoleum, laminate, parquet, or carpet. The front floor is covered with several layers of varnish or paint to improve decorative covering and higher resistance to moisture. OSB creeps on cement-concrete screed, to the old wooden floor, or placed on joists.

On a cement-concrete screed

For the floor you need to take OSB-3 made in Europe, since the quality of this material meets the stated requirements. Appeared on the market Chinese products. It is only suitable for packaging boxes or thermal insulation of walls. This slab is not suitable for flooring.

The thickness of the material laid directly on the screed must be at least 18 mm, provided that the top is covered with linoleum or laminate. If OSB is the main floor, then the slab should be at least 22 mm thick.

Regarding the question - is it possible to lay OSB directly on the screed, there are the most different opinions. Masters, relying on personal experience, defend their own point of view, and often they are contradictory among different specialists.

OSB – relatively new material, and how he will behave in 10-15 years is difficult to predict. Therefore, future homeowners choosing OSB as a floor covering also ask numerous questions about this material.

lay OSB on cement screed It is possible, but for this the cement base must be perfectly flat. To prevent the floor from moving, the cement screed must be coated with a special adhesive solution. The air humidity in the region where the house is being built should not be high. And if you live near a pond and the air humidity is too high, then it’s better to play it safe and put the slab on the joists.

Warm floors should not be laid under OSB. There are several reasons:

When OSB heats up, it will intensively evaporate resins and chemicals, which will lead to a weakening of the strength characteristics.
Vapors of adhesive substances will poison the residents of this room.
OSB has low heat transfer properties and will therefore prevent heat from escaping. You will constantly experience excessive energy consumption, and the room will not heat up.

In general, warm floors are good under ceramic tiles, under laminate or linoleum laid on a cement screed. Wood under a heated floor system is not suitable.

On the logs

Most experts believe that It is more expedient to lay OSB on logs– beams 3-5 cm thick. This is necessary so that there is air circulation between the screed and the slab and moisture does not accumulate.

The beams must be impregnated with fire retardant and anti-bug agent. It is advisable that the moisture content of the timber does not exceed 20%; all beams should be the same in height (or thickness). If the floor is laid on the ground floor, then it is recommended to lay bulk insulation or mineral wool between the joists.

The logs are placed at intervals not exceeding 50 cm from each other. The height of the beams is leveled with a level and a level. In places where the slabs are joined to each other, additional cross beams are placed, because self-tapping screws are screwed into the joists to hold the slabs on them.

Usually they choose for lags conifers two- or three-grade wood, but if the floor is intended for a room with high humidity, then it is better to choose larch or aspen timber.

On an old wooden floor

Many houses built during Soviet times have wooden floors. Cracks appeared here and there and the boards were slightly warped. Due to numerous stains, old floors look unpresentable, although they are still quite strong. Such a floor can serve as a base or subfloor for OSB.

New materials are constantly appearing on the market with which you can level a concrete base. These include oriented strand board (OSB). It has become a complete replacement for plywood or chipboard. OSB boards They also have excellent thermal insulation qualities, which puts them in a leading position. At the same time, you need to know how to properly level the floor with help and what the subtleties are in the work.

Types of slabs

OSB boards are presented in the form of layers of glued wood chips, which is also very highly compressed. Usually everything is done in three layers. The chips are placed perpendicularly inside, and along the outer layers along the entire slab. The following main ones are distinguished types of OSB slabs:

As for the thickness of the slab itself, much depends on the purpose of use. If you need to get rid of minor defects in the floor surface, then 10 mm will be enough, but for significant potholes - 10-15 mm. An even greater thickness will be required to install a floor on joists. In this case, you need to choose a layer of 20-25 mm.

Scope of application

When laying OSB on the floor is used, you should understand for what purpose this is all being done. There are main areas where this material is used:

At the same time, it is worth paying attention to the fact that there are enough, thanks to which it is possible to fully carry out installation on various bases.

Advantages

Any room can be brought to perfect condition if you use an OSB board. In some cases, you don’t even have to do any subsequent finishing of the subfloor. There are other compelling arguments in favor of choosing this material:

The right choice

With a huge range of products on the market, it can be very difficult to choose a specific option for the job. To ensure that the installation of smallpox on the floor is successful high quality, you should follow certain tips regarding selection.

When working, it is best to avoid using a jigsaw for cutting for the reason that lateral surface very rarely remains level.

Laying on a concrete base

If it is necessary to level the floor with an OSB slab, you should carefully prepare the base for work. Fill all possible cracks and potholes, get rid of defects as much as possible. There should be no garbage. After all, the mounting adhesive must have excellent adhesion to the base. It would be a good idea to cover the concrete floor with a primer to create a dense film on the surface. During operation, this will relieve the screed from dust.

The next steps are to lay out the sheets over the entire surface of the room. Along walls and other structures, slabs should be cut to size. The reverse side of the slabs is covered with parquet glue, which is based on rubber. To ensure that the glue is applied across the entire width of the material, a notched trowel is used. After this, the sheets are glued to the concrete floor.

To ensure the reliability of the entire structure, the OSB board is fixed with driven dowels. To ensure that everything here is strong, the fasteners are located at a distance of 20-30 cm from each other. The exception here is dry room, when dowels will be sufficient only in the corners of each of the slabs.

Between the plates there should be a width of about 3 mm. There is also a seam between the wall, but slightly larger - 12 mm. These gaps will help compensate for the expansion of the slabs under the influence of temperature changes and changes in humidity. No swelling will occur during use.

The final stage is to clean the surface from dust and debris. Any seams along the walls in the room are sealed with polyurethane foam. The entire “cake” will dry in about 3-4 hours. More accurate data is shown in the manufacturer's instructions. If there is excess foam, it should be cut off using sharp knife. In the future, you can carry out finishing and flooring work.

Installation on joists

You will not need to use leveling screeds to create a flat surface in the room if you purchase OSB boards. Time is saved due to the fact that you do not need to prepare a solution for leveling the floor yourself. This reduces to some extent general expenses for repairs.

In this case you will have to do . In addition, materials can be placed into the created structure to improve the protective functions from moisture, excess sound and noise, as well as improve the thermal insulation qualities. In addition, the floor is leveled quickly and in the shortest possible time.

Attaching the joists to concrete base performed using anchors or dowels. Depending on the thickness of the purchased OSB board, the distance between the logs will be determined. The thicker, the wider the distance. With a step of 40 cm, there should be a slab with a thickness of about 15-18 mm. If the distance between the lags is more than 60 cm, then the material itself must have a thickness of at least 22 mm. This is provided by the OSB floor leveling technology.

After installing such a design, there will be a space inside that can be filled various materials. It's mostly isolation. For the first cold floors, it is perfect in the form of mineral wool or polystyrene foam, and in the presence of damp basement – vapor barrier films or membranes.

The placement of the slabs should be across the joists. We must not forget about expansion joints, which should be determined in the middle of the lag. Gaps are set not only between different slabs, but also along the wall in the room. The sheets used can be attached to the joists using nails or self-tapping screws. True, it is best to choose spiral or ring nails. Along the perimeter of the sheets, a fastening pitch of 15 mm should be maintained, and on intermediate supports– 30 mm. When using nails, measure the distance from the edge of the slab to approximately 10 mm. As for the size of the fastener, the length should be approximately 2.5 times greater than the thickness of the used OSB sheet. In this case, leveling the concrete floor with your own hands will be at the highest level.

OSB processing for finishing

When you have received an answer on how to level an OSB floor, you can think about finishing. Processing must take place in strict accordance with . The simplest option is to coat the existing sheets with varnish, place skirting boards around the perimeter along the walls and rejoice natural look material. But still, in most cases, when they think about how to level a concrete floor with their own hands, they subsequently lay the floor covering. The specific treatment depends on the type of coating, as well as the desired result.

Ceramic tiles on the floor. The base structure should not move or move. This applies to a greater extent to the floor on the joists. The surface should be sanded wire brush or sandpaper. The work uses only special glue that can connect wood and. Only in this case will you get excellent leveling followed by tiling.
Clean finish. As mentioned earlier, the surface is not covered with anything. But at the same time, you should think about carefully protecting the slabs from external influences. To do this, several layers of varnish or other special products are applied to the top part. They will create a barrier against wear and tear. Special components in the coating elements prevent the appearance of various insects and especially the bark beetle.
The materials are durable and tough. It can also be used to cover the OSB leveling layer. In addition, the laminate has special fastenings, which allow you to forget about many other requirements for the subfloor. The result should be a flat surface. The interior will not only be beautiful, but also durable.
Linoleum. There is an alternative to this floor covering - carpet. For their flooring there is very important requirement– the base of the floor must be perfectly level. Otherwise, over time you may encounter serious defects. Except performance characteristics altitude changes will be reduced to nothing appearance and attractiveness. Stepping on such a surface, you will be able to feel every defect (cracks, crevices, gaps, bulges, screws, etc.). One level will allow you to get the scraping process, which will need to be done before laying the floor covering.

Using OSB boards for the base floor in any room allows you to get a flat surface on which you can subsequently lay almost any type of floor covering. Compliance with technology will lead to positive result. The main thing is to wisely choose the specific type of stove to work with and follow the instructions.

Features of choice

Laying OSB on a concrete floor

Read also: Construction of a well from concrete rings

Processing material

http://youtu.be/Wcfg5cTWiaw

Benefits of use

Read also: Construction strip foundation for a country house

Page 2

Reinforcement
Manufacturing
Tools
Installation
Calculation
Repair

1pobetonu.ru

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

OSB board is a modern building material, which in its characteristics has successfully replaced chipboard and plywood. These oriented strand boards are used both in the construction of frame houses and for insulation. These products are also used for arranging rough coverings. An OSB floor is an excellent opportunity to level a concrete screed or 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 the chips are placed along the length, on the inside - perpendicularly. This solution gives the new building material particular strength.

Types of OSB boards

Several types of these slabs are used in construction work, as well as during repairs. 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 a more versatile board. 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 the floor?

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 to level the floor before laying the finishing floor covering. If there are only small defects on the 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 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 you should use even thicker sheets - the thickness should be from 15 to 25 mm.

Selection rules

Main functions of OSB boards

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

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

Advantages and Disadvantages

Among the advantages of such a building material, there is also a fairly high density - 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 bathhouses, as well as in various unheated rooms.

Laying OSB on the floor does not require any special skills - any home craftsman can do it, which is a serious advantage. To arrange a rough foundation, it is enough to be able to use a regular building level, a hacksaw and a 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 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 terribly crooked concrete screed. For alignment, you can use the following scheme. The technology is relevant for any concrete surfaces.

The first step is to clean the work surface as much as possible. 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 adhere better to the concrete surface. In addition, the primer forms a fairly dense film on the screed, which will prevent it from collecting dust during use.

Then they begin to lay out the OSB boards on the floor. If necessary, cut the pieces to the required size with a jigsaw or circular saw. Parquet glue 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 is taking into account the fact that high-quality glue is used.

In conclusion, it is necessary to thoroughly clean the resulting surface from accumulated dust and various debris. Expansion joints are filled with 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 starting installation work, you should again prepare a basic foundation. It is very important to pay attention to nails, if any. They need to be recessed deep into the board. A regular hammer and a steel bolt are best for this. The diameter of the bolt must be equal to the diameter of the nail. If the floorboard has become unusable during use, it must be restored using a plane.

After this, 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 for 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 heads of the screws 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 a grinding machine will do. If you need maximum effect, then you should arm yourself with a vibration machine that is equipped with a sanding mesh. It is worth processing the slab with the utmost care - you can easily make indentations on its surface.

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Laying OSB on a concrete floor

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Laying OSB on a concrete floor

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.

Features of choice

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

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

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;
on concrete surfaces it is necessary to use slabs up to 10 mm thick, for wooden covering their thickness depends on the distance between the logs.

Size standard plate OSB is 2440x1220 mm, so the required quantity is calculated based on the location to ensure a minimum of waste. With the help circular saw easy to cut 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, finishing materials can be installed: tiles, linoleum, laminate, parquet board.

The main functions of OSB on 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 independently flooring, or you can use it 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 processed 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 reliable connection 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

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

OSB boards are very popular due to their characteristics, therefore they have very wide application during construction. Depending on the thickness, the slab can perform a load-bearing function even in a damp room. OSB boards consist of stacked, ordered small particles of wood held together by a binder. In this step by step guide we will show you how to install OSB correctly.

Since the composition of the OSB board is such that all its elements are laid in one direction and beautifully aligned, the OSB, even in its untreated state, looks harmonious and, in part, even modern. Besides, modern development technology in industry makes these panels particularly strong and resistant to external environment. Thus, the OSB panel is used for various purposes. Thin versions of OSB boards are used for the construction of partitions or wall decoration, also for cladding pitched roofs. Thicker slabs are used for flooring.

Tools:

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

If the floor is laid in a floating manner, this means that the 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 there is a constant change in air pressure and temperature. However, if the floor is laid in a floating manner, it can always expand and contract freely towards the walls without making annoying sounds.

Advantages of OSB boards

Manufacturers of this material produce slabs in four classifications. The first OSB - 1, are panels that are used for making 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 boards - 3, are laid in wet rooms as bases. They are ideal for floating installation in loft or concrete surfaces.

The fourth class of OSB is a panel 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 beams in the attic are spaced far enough apart to create a strong floor. If the distance between the beams is a meter or more, then undoubtedly you need to use OSB - 4. Starting from a distance from the beam of about one meter, you should use these panels in any case.

OSB 3 – universal option for flooring

OSB of the third class is an ideal option 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, raising this material to a height yourself will be difficult or even impossible. Depending on the thickness of the slab, the weight can be from 590 to 610 kilograms per cubic meter.

Sizes of slabs available for sale

Tongue and groove board size 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

Advice: the optimal choice is not only to choose thicker OSB boards - 22 or 25 mm in size, but also, if possible, made with grooves and a tenon for connection. This way, you will get higher strength for a floor that will withstand greater weight loads.

Before starting work, check beams and boards for damage caused by worms or rot. If you install new flooring, you will no longer have access to these elements of the house and the ability to change or change anything.

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

Leveling the floor

An old floor or concrete floor that has been in use for many years will often be slightly uneven, so it will need to be leveled using a leveling layer before installing OSB panels. Otherwise, the slabs will sag or sag over time. It is possible that even with heavy load on the floor they may 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 backfilled bulk material and are leveled with a rule or a large level, or finally with a flat board. At the end, you need to make sure that everything is level and packed tightly, without holes or protrusions.

When leveling you will need:

fine expanded clay or leveling mixture
guides
rule
level

Especially if OSB is laid on an old floor made of wooden planks, a vapor barrier is required between them. It's just rugged polyethylene film, which you stick with aluminum adhesive tape. The film should extend well onto the wall so that it will later be higher than your new OSB floor. After all work is completed, the film will be hidden behind the baseboard.

Laying sound insulation

If laying OSB you are not doing it on the ground floor, then you additionally need to lay soundproofing material. Otherwise, your walking on the floor will be very audible in the room below you. Sound insulation is sold both in rolls and in small mats; it is not very expensive, so there is no need to omit this step.

Laying slabs - first row

Before installation OSB panels should have time to adapt to room temperature, just like laminate or parquet. Therefore, it is recommended to store the slabs indoors for at least 24 hours before installation to allow them to acclimatize.

Start installation from the very beginning long wall rooms - from the left corner. For slabs that lie against the wall, the lock from the wall is cut off 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 establish a gap of 1.5 to 2 centimeters - this is an expansion joint.

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

The last leaf in the first row should usually be trimmed. To ensure that the seams of the slabs do not fall directly into one row, the cut slab is used as the first element in the next row. Thus, a composition similar to brickwork. Always use enough wedges to ensure the floor is clamped on all sides.

If the remaining piece of sheet that fits 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.

Hardening and cleaning of glue

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

Tip: use wedges good quality, preferably plastic. Wooden wedges partially split even with the first correct blow with a hammer. And soft fibers cannot support a large floating floor.

In a non-occupied 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 screws and go over the holes with a countersink. This way the screws will be recessed into 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 air humidity. Stainless steel screws are ideal for this purpose because they can be removed even after years of use in a damp environment.

Double OSB 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 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 of 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 small thickness of the sheets also saves money. Although the floor in this version will be thinner than a floating one, it will be much more stable and stronger.