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, this coating has high strength and light 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 boards and inexpensive, quality material for flooring. It is durable, moisture-resistant, lightweight.
Features of choice
There is now a large number of OSB selection, which differ in their properties and characteristics.
In order to do right choice, the following recommendations must be followed:
- Canadian and Canadian products are considered to be of the highest quality. 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;
- for concrete pavement it is necessary to use slabs up to 10 mm thick; for wooden pavement their thickness depends on the distance between the joists.
Size standard plate OSB is 2440x1220 mm, so the required quantity is calculated based on the location to ensure a minimum of waste. Using a circular saw it is easy to cut to the required size; using a jigsaw for this is not recommended, since it is not always possible to obtain an even cut with its help.
Laying OSB on a concrete floor
If your room has a concrete floor, then fix OSB as flooring material is a great solution.
After OSB has been laid on the concrete floor, you can install Decoration Materials: tiles, linoleum, laminate, parquet boards.
The main functions of OSB on a concrete floor:
When calculating the number of slabs, you need to take into account that losses when cutting a slab are 7-10%.
- leveling an imperfect floor surface, which usually has unevenness, height differences and other defects;
- reliable sound insulation, which is ensured by the multilayer structure of the material, which allows you to well absorb various noises;
- waterproofing and floor insulation. This material has a natural base, high heat-saving characteristics and moisture resistance.
If there are significant unevenness of the concrete coating, then the OSB board is fastened not immediately to the floor, but to wooden blocks, which play the role of lag.
To ensure maximum rigidity and resistance to deformation, it is better to use OSB boards with a thickness of 8-10 mm, laid in two layers. The layers must be laid offset; they are attached to each other using spiral nails or glue.
If the concrete floor is flat, then you can lay OSB directly on it; in this case, one layer will be enough; it is secured with self-tapping screws or dowels.
Although the material is moisture resistant, partial absorption of moisture occurs and it expands slightly. To compensate for possible expansion or contraction, it is necessary to provide expansion gaps between the plates of up to 3 mm in size.
Processing material
OSB boards can be used as an independent floor covering, or they can be used as a base for laminate, linoleum or parquet.
This coating can also be used independently; for this, it is stripped, and then several layers of varnish are applied to it. If installation is carried out roll materials , then it is necessary to ensure a smooth transition at the joints, the slabs are taken minimum thickness
. They try to make gaps from the wall side; they are treated with elastic sealant. To cover the floor with tiles, the base must be completely motionless, so OSB must be laid especially carefully. The tiles are placed on a special glue, which ensures reliable connection
ceramics and wood.
Laying OSB on a wooden floor is used when repairing tongue and groove flooring, to strengthen the subfloor, or to provide a continuous layer when laying small-format cladding (for example, tiles, PVC tiles, parquet). Although the quality of oriented strand board is superior chipboard characteristics
, this construction material is not suitable as a finishing floor covering:
Therefore, OSB is used more often as a subfloor:
In this case, you need to know how to properly attach OSB sheets to floorboards/joists and use offset seams in adjacent rows.
- There are several types of oriented strand boards:
- OSB-3 – can be used in rooms with high humidity;
- OSB-4 – for load-bearing structures.
Important! Since the subfloor has low maintainability, it is prohibited to use OSB-2. The slabs are additionally treated with an antiseptic and waterproofing material.
The main characteristics of oriented strand boards are:
- density – 630 kg/m³;
- thermal conductivity – 0.13 W/m*K;
- linear expansion – 0.15% at a humidity of 70%;
- straightness – 0.6 mm/m;
- the perpendicularity of the opposite sides of the sheet is within 3 mm;
- thickness deviation – 0.3 – 0.8 mm (ground, untreated, respectively).
Advice! Manufacturers produce slabs different sizes, which must be taken into account when purchasing in order to reduce cutting waste for specific dimensions and room configurations.
Installation technology
To lay it down correctly sheet material over an existing plank floor, the following conditions must be met:
Important! When laying parquet, PVC tiles, other small format claddings, the screw heads must be puttied.
Depending on the type of finishing floor covering OSB boards focus on wooden floor not the same:
- for small format decorative materials It should be ensured that the seams of tiles and PVC tiles do not coincide with the joints of OSB boards;
- when choosing laminate, tongue and groove, decking or parquet board ranks OSB is better lay across the direction of long claddings of the finishing layer or at an angle of 45 degrees for a diagonal layout (relevant in rooms with defects in the geometry of the walls).
Advice! On OSB it is allowed to apply a screed made of DSP or self-leveling floor. However, the surface of the oriented strand board must be pre-treated with a waterproofing material to avoid leaks into the lower floor and swelling of the structural material itself.
Finish flooring repair
The main problem with plank flooring is a floorboard or several boards, which develop a transverse “hump” during periodic changes in humidity or during the drying process. This leads to an increase in the repair budget:
In other words, OSB with a thickness of 22 mm or more should be used. This problem can be solved by preliminary grinding or scraping of the base:
- a grinder or sander will smooth out the “waves”;
- the contact area of the subfloor layers will sharply increase;
- You can get by with oriented strand boards of smaller thickness.
However, this is not always possible when the existing floor covering is thin.
OSB subfloor top layer
- provide a level base for the floor covering;
- increase spatial rigidity and strength of the base;
- reduce labor and material consumption of work.
Unlike floorboards, self-tapping screws are screwed into OSB boards strictly vertically. When the hardware is tilted, a change in geometry and warping of the material over time may occur.
The main problems arise when opposite walls diverge (trapezoid instead of a rectangular room shape). In this case, it is necessary to mark the existing wooden floor in order to trim only the slabs of the first row:
Thus, the OSB structural material is suitable both for creating the top layer of a subfloor and for repairing a finished floor covering made of tongue-and-groove boards if dismantling this cladding for some reason is not practical in the room. When choosing an oriented strand board, the labor intensity of the work is reduced, House master makes do with the existing arsenal of tools.
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OSB boards are one of the relatively new building materials, which Lately is becoming increasingly popular. Increased strength and lightness compared to other similar products, good moisture resistance, ease of use and low price are the reasons for their use in a wide variety of types of repair work.
One of the most common uses of oriented strand boards is in flooring. In this article we will tell you how to properly lay an OSB board on the floor when using it as a base for various finishing coatings.
How to choose an OSB board for the floor
Due to the growing demand for OSB, there are currently quite a lot of products on the market that differ in both technical specifications, and by the presence of harmful impurities hazardous to human health. Therefore, when choosing a material for renovating a room, you need to follow a few simple recommendations:
Laying OSB on a concrete screed
When replacing the floor in rooms with concrete covering OSB panels serve as an excellent basis for installing various finishing coatings - linoleum, tiles or parquet boards. They perform the following functions:
- Surface leveling– a concrete floor, as a rule, has a significant difference in height and different kinds defects. Laying OSB on a concrete floor will provide a perfectly flat surface suitable for installing any coating;
- Soundproofing. Dense multi-layer construction the slabs reliably absorb all types of noise;
- Insulation and waterproofing. The natural base of the board allows for good heat-saving functions, and the resistance to water, characteristic of products of the OSB-3 class, protects against moisture contained in the concrete base.
Most often, the slabs are laid on wooden blocks, which act as floor joists and allow errors to be smoothed out.
To ensure the necessary rigidity and resistance to deformation, it is better to use two layers of slabs of small thickness (8-10 mm), laid with a slight offset. The layers are attached to each other using special glue and spiral or ring nails.
If there is a level base or using leveling solutions, installation directly on a concrete base is possible. In this case, one layer of slabs is sufficient, which is secured with dowels and screws. How to do this, see the video below:
Since OSB boards are capable of absorbing moisture from surrounding atmosphere, they can change their size during operation. To compensate for expansion and contraction, special gaps of 3 mm are left between the plates, which are called dilation.
In addition, when installing floating floors, it is necessary to ensure a distance of 10-15 mm from the flooring to the walls.
Installation of base for wooden floors
In rooms installed on flood or columnar foundations, floors are most often laid on wooden joists from timber or multilayer boards. In this case, OSB boards can be used as a rough or finished floor, as well as for creating a leveling surface for finishing floor coverings.
Laying OSB on a wooden floor is carried out taking into account the same recommendations for ensuring expansion gaps as in the previous case. When installing a two-layer coating, these requirements apply to both layers.
Features of OSB surface treatment for different types of floor coverings
Unique strength and wear resistance characteristics, as well as hard Smooth surface the front part allows the use of OSB boards as independent material for finished floors, and for preparing the base for all popular types floor coverings.
Advantages of using OSB for flooring
The use of OSB boards allows you to quickly and efficiently level the floor in any room. In addition, in some cases they are sufficient for use without further finishing. Working with this material has the following advantages:
- It's simple. No special skills or special tools are required. Installation of OSB on the floor can be easily done by any adult with minimal construction skills.
- It's comfortable. One OSB board provides smooth coating large area. The size of the slab allows the joists to be placed at a distance of 56 cm from each other, which is ideal for placement between them modern species insulation.
- It is not expensive. It compares favorably with many similar materials.
- It's reliable. OSB boards hold all types of fasteners well and are stably fixed in position. They do not deform during long-term use, do not change shape and hold the load well.
OSB is one of the most economical options for quick independent device floors during renovation or construction.
Frame technologies, which have long conquered the construction markets of Europe and North America, are becoming increasingly popular in our country.
Number country houses and dachas built in a similar way are growing every year. Main advantages frame technology: high speed of construction and low cost.
This is achieved largely through the use of special building materials - OSB boards, which are used both as subfloors and for the construction of building walls. In this regard, owners often frame houses questions arise regarding them finishing, in particular, how to lay tiles on an OSB board.
What is OSB board
Frame plate consists of wood shavings Oriented strand board (Russian - OSB, English - OSB) is a relatively new material on our construction market. Structurally, OSB consists of several layers of pressed shavings, bonded together using synthetic resins.
Each layer of chips is oriented in a certain direction, and the layers are located strictly perpendicular to each other. This makes it possible to obtain those wonderful technical qualities that this material different from other wood composite materials(Fibreboard, chipboard, plywood, etc.).
The main advantages of oriented strand boards are:
- strength;
- flexibility;
- ease of processing;
- low weight;
- affordable price.
Another advantage of OSB board is its versatility. Walls and floors made from it are suitable for almost any type finishing– painting, whitewashing, plastering, etc. You can also lay tiles or porcelain tiles on OSB boards.
Difficulties in working with OSB
However, when finishing works With OSB you need to follow a number of rules so that the results do not disappoint you.
It must be remembered that the base of the OSB board consists of wood. Consequently, the slab tends to absorb moisture, which leads to its swelling and deformation.
The particle board is brittle and has poor adhesion Like all sorts of wooden surfaces, OSB panels have poor adhesion to cement-based adhesives, so most tile adhesives will not be able to ensure reliable adhesion of the tiles to the surface of the particle board. To do this, a number of works should be carried out to increase the adhesion of the bearing surface.
Another one OSB feature– its flexibility, which prevents the panel from cracking under the influence of physical activity. Under the weight of people moving around the room, the slab will bend slightly.
Compared to OSB, tiles are almost incapable of bending. As a result, the tiled flooring will inevitably peel off from the base, and the seams between the tiles will crack.
To avoid this, you will have to make the surface of the slab as hard as possible.
Lay slabs only on very strong level bases
To ensure that the surface of the particle board is solid and does not bend, it should be laid on sufficiently strong foundations. If we are talking about flooring, then OSB boards can be laid directly on concrete floor. The main requirement for the underlying layer is that it must be even in the horizontal direction.
Any bends, bumps or depressions can cause the OSB panel to lie loosely on the concrete surface, and this, in turn, will lead to sagging of the particle board and gradual peeling of the tile covering.
For minor defects in rough concrete floors, you can get by with “local measures” in the form of chipping off bumps and sagging with a pick, or filling up holes and cracks with putty.
However, with significant horizontal slopes of the foundation, such half-measures will no longer be sufficient.
To level the surface of the floors, you will need to make a concrete screed. For these purposes, you can use ready-made dry sand concrete mixtures, which can be purchased at any hardware store. To prepare a ready-to-use solution from a dry mixture, you should dilute it with water in the proportions indicated on the package.
To get the most quality solution, when preparing it, you should strictly follow the instructions from the manufacturer.
The screed requires sand, cement and water. You can also prepare your own floor screed solution. For this you will need M-300 or M-400 cement, water and coarse sand.
If the thickness of the concrete screed is expected to be more than 30 mm, it would be advisable to use fine gravel instead of sand.
The table shows the proportions for preparing the solution for cement-sand screed.
The easiest way to make beacons is from a metal profile Next, using a laser or building level, we set horizontal guides - the so-called beacons. They can be made from metal profiles for plasterboard or even wooden slats. Beacons are installed on substrates made of pieces of brick, fragments of tiles, etc., parallel to each other with an interval of 0.7 - 1 m.
Thus, the beacons divide the room into several compartments stretched along the entire room. Concrete should be poured from the furthest point from front door compartment, leveling the concrete to the level of the beacons using long rule. After the concrete has completely dried, you can begin laying OSB slabs on the screed.
Time to fully gain strength concrete pouring is about 4 weeks. If you attach particle board to the screed before this, the concrete around the dowels may simply crumble during installation.
As a result, the slab will “walk”, and the one laid on it tile lag behind the base.
Laying OSB panels on a wooden base
Durable and smooth flooring will protect the slabs from deformation Most often, OSB panels are used in low-rise frame construction, where the main building material is wood. In this case, wooden planks can be used as a base to make the particle board more rigid.
You can run it as usual wooden floor, on which the OSB board is laid and secured using self-tapping screws. In order for the surface of the slab to be smooth and not sag during use, the boardwalk must be made as durable and smooth as possible.
If the OSB board acts as a subfloor, which often happens in frame construction, it can be made stronger and more rigid using a thick sheet of plasterboard or cement-bonded particle board.
These materials will not only add rigidity to the OSB, but will also allow you to obtain a fairly strong adhesion to the tile adhesive.
When laying on the floor, you should use moisture-resistant types of plasterboard. If the owner decided to save money on floors and installed a regular gypsum board, at the first leak of water pipes or heating pipes he will have to open the floors and change the soaked gypsum board sheets.
The mesh will help keep the glue on the surface of the slabs The third option for preparing an OSB base for laying tiles is to attach a plaster mesh to the surface of the slab. In this case, the tile adhesive will adhere to the mesh, which will simultaneously play a reinforcing role.
However, as practice shows, this method is more suitable for tiling walls than floors. On the floors, the tiles, under the weight of furniture and people, gradually begin to move away from the OSB subfloors.
Laying tiles on OSB walls
When tiling walls made of OSB panels, you can encounter the same difficulties as when laying ceramic tile flooring. To increase adhesion (adhesion) between OSB and tile adhesive, in addition to the already mentioned plaster mesh, you can use primers and special adhesive mixtures. How to stick tiles in frame house, watch in this video:
Surface primer
Using a primer, you can significantly increase the adhesion of any building materials, and particle board is no exception.
Before applying a layer of primer to the panel, it will need to be thoroughly cleaned using coarse sandpaper or a sanding machine.
After this, using a roller or paint brush The first layer of primer is applied.
For the best effect, use at least two layers - the second is applied after the first layer has completely dried (after about 10 - 12 hours).
Selection of adhesive composition
When installing tiles on OSB, you should not skimp on glue. Since the usual tile adhesives on cement based will not be able to provide sufficient adhesion to the surface, you will need to find a “stronger” option.
PVA construction adhesive has good properties for gluing any materials. It will be able to firmly connect the surface of ceramic tiles and OSB boards.
Small areas can be covered with liquid nails If the cladding area is not so large, for example, kitchen apron made of ceramic tiles, you can use “liquid nails” from any manufacturer to glue the tiles.
However, if the wall area is large, this option will be quite expensive, and dismantling the tiles in the future will be very difficult. With the same success, you can use any silicone sealant instead of “liquid nails” for gluing tiles.
Also, when laying tiles on problematic bases, these have proven themselves well. adhesive compositions such as “Ceresit”-SM, “Soudal”-24A, “Knauf-flex”, which contain special polymer additives.
Laying tiles on the wall
Mark the bottom strip from which the laying will begin After all the preparatory work is completed, you can proceed directly to laying the tiles.
First of all, using a laser or hydraulic level, we mark the wall.
At the bottom we mark a horizontal strip along which the first row of tiles will be glued. To lay tiles you will need the following tools:
- notched trowel with teeth 5–10 mm long;
- laser or hydraulic level;
- mallet with a rubberized striking surface;
- rubber grout spatula;
- corner braces;
- tile cutter
The lower level is marked with a strip - this will keep the tiles from sliding Along the line indicating the lower horizontal level, we fasten it to the OSB plate using self-tapping screws. metallic profile or wooden slats.
It will act as a support - the first row of tiles will be placed on it. Otherwise, the tiles may slide down the fresh mortar.
Apply to the surface with a notched trowel. adhesive solution along the entire bottom row. As a result, we get a wavy structure: it is necessary for the convenience of adjusting the tiles in depth. By lightly tapping with a rubber mallet, you can deepen the protruding corners of the tile.
After installing the first row, we insert cross-shaped corner spacers into the upper corners and begin laying the second row. Spacers will allow you to maintain the same joint size between all tiles.
Usually, after laying 4 to 6 rows of tiles, a break is taken to allow the glue to “set.” Otherwise, excess weight will put pressure on the lower rows, under the influence of which they can simply move away from the surface of the OSB panel, fold and crumble.
12 hours after completion of the masonry, you can begin to putty the joints using a special grout solution and a rubber spatula.
Installation of floor coverings
As you can see, laying tiles on OSB walls is practically no different from the work of facing concrete or brick walls. The same can be said about laying ceramic flooring.
After producing all preparatory work We mark the floors so that the center line is perpendicular to the wall in which the entrance door is located.
We find the middle of this wall and draw a line at an angle of 90 degrees (pull the thread). We perform the same operation with the adjacent wall. As a result, we get the intersection of two lines exactly in the middle of the room. From this place we begin to lay ceramic floor tiles, moving along the stretched perpendicular threads.
When approaching the walls, the tiles are cut to the required size using a tile cutter.
OSB board is a modern construction material, which, according to its characteristics, has successfully replaced chipboard and plywood. These are used 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 inexpensively and with minimal effort level a concrete screed or
What is OSB?
Oriented strand board consists of several layers pressed and then glued with special waterproof resins. It is glued together in three layers. On external sides The chips are placed along the length, inside - perpendicularly. This solution gives the new building material particular strength.
Types of OSB boards
IN construction work, and also during repairs, several types of these plates are used. So, OSB-2 is a panel that has very low moisture resistance. This solution is only suitable for interior work in dry rooms.
OSB-3 is more universal plate. Among the characteristics is high resistance to moisture both indoors and outdoors. The plate also has a huge safety margin.
OSB-4 is the most durable and most moisture-resistant materials. They are used only to create load-bearing structures in conditions where the humidity level is especially high.
Which slabs are suitable for flooring?
If you need to make a floor from OSB, then OSB-3 is best suited for these purposes. These boards perfectly withstand the impact of heavy furniture, various equipment and other mechanical loads.
These panels are used before laying the finishing floor covering. If on rough concrete or wooden base There are only small defects, then the thickness of the sheets in this case should be no more than 10 mm. If there are larger protrusions and depressions on the surface, then it is best to use thicker slabs. Their thickness in this case should be from 10 to 15 mm.
If you plan to build the floor on joists, then even thicker sheets should be used - the thickness should be from 15 to 25 mm.
Selection rules
It is worth knowing some selection rules. It is very important who made the sheets. Experienced experts recommend choosing products from Canada or Europe. As for the size, the standard for this material is 2.44x1.22 m.
Main functions of OSB boards
Such panels are used to create a smooth and extremely durable base for various types of modern finishing floor coverings. It could be parquet ceramic tile, laminate, carpet.
This perfect 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 a big 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 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 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 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 to adhere better to 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, trim the pieces to required sizes jigsaw or circular saw. It is applied to the material from the reverse side. It should be chosen only on a rubber basis - it is more effective for solving this problem. To ensure that the glue can be applied as evenly as possible, experienced professionals recommend using a notched trowel.
Additionally, the plate should be secured with a driven dowel. This is done to ensure a guaranteed and secure hold. It is best to hammer in dowels around the perimeter. 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 the topcoat.
Installation of OSB on a wooden floor
So before you get started installation work, you should again prepare the basic foundation. It is very important to pay attention to nails, if any. They need to be recessed deep into the board. 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 batten During 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 screw heads are recessed into the slab.
After installation is completed, it is recommended to sand the joints. This can be done by hand, but if the area of the room is large, then it will do. If you need maximum effect, then you should arm yourself with a vibrating 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.
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.