Plywood floor without lag in the apartment. How easy it is to level a wooden floor with plywood. Laying on point supports

In this article, we will consider how to level the old floor with plywood under the laminate, for example, let's take two basic bases: wooden and concrete.

The use of plywood as a leveling layer under the floor finish is considered to be an economical and proven method.

The technology of arranging a dry screed using plywood does not require significant labor costs and large financial investments.

Since it is possible to level the floor in a short period of time, and at the same time it is not necessary to wait for the maturation of the screed, as a result, the repair of the floor surface is carried out without delay.

alignment wooden base can be carried out in two ways: on the crate and without it. Which technology is best for leveling your floor under a laminate is up to you.

Leveling a wooden floor with plywood along the logs under the laminate involves the dismantling of the old coating, including floors and boards lying on the logs.

After the boards are removed, it is necessary to inspect the log, some of them may have to be replaced with their own hands or simply strengthened with anchor bolts.

If you need to raise the height of the floor in the house to a certain level, then you can completely get rid of the worn logs and install new ones, having determined in advance the desired step size.

It is best to use wood beams for mounting the log. conifers trees. First of all, they make a strapping around the perimeter of the room, leaving a temperature gap of 50-100 mm at the walls.

Then working area equip with longitudinal bars with a distance of not more than 60 cm. Control the correct horizontal lag with building level.

Plywood is fixed on the bars in such a way that the butt joint of the sheets rests on the support.

It is impossible for the seams of the leveling layer to hang in the air. If the battens were laid with big step, then it is necessary to supplement the supporting base with transverse bars.

At the same time, the smaller the cell of the supporting floor, the better it will be to level the base under the laminate with your own hands.

First, an insulating layer is laid, as it can be used polystyrene boards or mineral wool. On top of it, a vapor barrier is installed with an overlap on the walls.

Mounting plywood sheets on bars:

Taking into account the unevenness of the walls, they control the corners and adjust the extreme sheets of plywood to the required parameters;
Installation of plywood is carried out in a run, so as to avoid the formation of a cross-shaped seam of four sheets. At the same time, a temperature gap of about 2 mm should remain between the products;
Indent plywood cover from the wall must be at least 20 mm. The free space will subsequently be masked by the plinth;
Fixing plywood to the beams is carried out using self-tapping screws. The length of the rods of the fasteners is calculated by multiplying the width of the sheet by the number 3;
Holes for self-tapping screws are pre-countersinked, which will allow their hats to be completely drowned in the plywood plane;
Laying plywood on the crate is done in strips. Fasten sheets with a step between fasteners of 20 cm;
If necessary, the extreme elements of the floor are cut with an electric jigsaw for laying communications, or adjusted in accordance with the protruding parts of the wall;
After the installation of plywood on the crate is completed, the irregularities are puttied.

In addition to the above material, we suggest watching a video on how to align wooden floor plywood.

Leveling a wooden base for a laminate without lag

align wooden surface sex is quite possible without the use of a lag. We can consider this technology, of all existing ones, the most in a simple way leveling the floor under the laminate.

AT this case no time wasted for dismantling old surface and mounting log.

In addition to plywood, wood floors can be leveled using cement-bonded or gypsum fiber boards for the floor.

It will sag under weight and deform over time.

To level the plank floor, you need to choose the right thickness of plywood.

If the floorboards have a width of about 20 cm, then the thickness of the product may be 10 mm; with a floorboard width of more than 20 cm - the thickness of the plywood should be about 20 mm.

Installation of plywood sheets without lag:

It is necessary to retreat 20 mm from the wall, in order to correctly form an indent, it is necessary to set mounting bosses along the perimeter of the floor;
When mounting sheets between them, it is necessary to leave a temperature gap of 3-8 mm, with the help of which depreciation of the rolling stock will be achieved when the humidity index changes;
During the installation of plywood under the laminate, it is recommended to imitate brickwork. That is, each sheet must be stacked with an offset relative to the sheets of the previous row. Minimum value offset is equal to ¼ of a plywood sheet, the maximum parameter is half the width of the product. Crosswise joints of the seams of four products should be avoided;
Fixing sheets to boardwalk with your own hands, you need to correctly distribute the attachment points. In this case, it is necessary to focus on the step between the height differences identified in the process of preliminary measurements. More details in the video below;
Holes for fasteners are made in advance in several stages. First, a hole is drilled using a drill, the diameter of which corresponds to the size of the self-tapping screw. Then the finished hole is countersinked so that the fastener head after screwing in is at the level of the plane of the plywood sheet.
All holes that should be located around the perimeter of the sheet are made by hand with an indent from the edge of at least 20 mm.

Leveling concrete screed with plywood

You can level the concrete flooring under the laminate using different technologies alignment, but the plywood technique is the simplest and cleanest. After all, in other cases, you can not do without concrete work.

Depending on the evenness of the concrete base, choose the option of final leveling the surface with plywood under the laminate.

The technology may include a lag method or floor leveling without the use of a lag structure.

Leveling the concrete base without lag - best option for relatively smooth screed, the difference in its horizontalness can be no more than 1-1.5 cm.

Plywood sheets are glued to the concrete floor with a special adhesive, then additionally fastened with dowel-nails.

By the same principle, do-it-yourself leveling of the concrete floor is carried out using chipboard plates.

The main thing is that the base on which the leveling layer will be mounted is strong and even.

Leveling the screed along the crate is required if it is necessary to raise the concrete floor or when the height difference of the horizontal surface exceeds 1.5 cm.

Leveling a concrete screed by means of beams involves the following series of actions:

First of all, it is necessary to prepare the base, as a result of which the screed should become completely dry and clean;
Along the perimeter of the room, using the building level, determine the boundaries of the future flooring;
customized to the right size bars, as a future supporting structure use products from coniferous wood. Logs can be purchased at a hardware store, but, as a rule, they are not always well dried. Completely dried wood is suitable for the construction of a rough base, otherwise the structure may twist. Suitable material parameters are 40x100 mm;
For the workflow also prepare wooden spacers the following sizes: width - 100-150 mm; length - 200 mm; thickness - 250 mm;
The installation of the bars should be carried out transverse to the door opening, in increments of 40-50 cm. The indentation from the wall should be 20-30 mm, it is done in order to exclude deformation of the floor due to temperature fluctuations;
Controlling the evenness of the structure being mounted and its compliance with the intended height of the future floor, wooden wedges are placed in uneven places;
In this case, between each element (wooden wedges, gaskets, logs) it is necessary to lay a soft soundproof layer, a piece of linoleum or foamed polyethylene;
Logs are mounted around the perimeter of the room, then transverse bars are attached to them. The voids of the finished crate are filled with a heat-insulating layer, which is used as mineral wool or basalt. As a result, the floors will not only be insulated, but also silent;
Then they proceed to the laying of plywood sheets, they must be well dried, and for ease of installation they are dissolved into squares of 75x75 cm. Products are mounted on bars with self-tapping screws with temperature gap 2-3 mm.

A thematic video plot will complete and supplement the above information with details.

Starting overhaul or simply deciding to change the old flooring, you will have to take it seriously preparatory work. If you are going to lay linoleum or laminate, the subfloor must be perfectly flat. However, concrete screed is not always the best option. If you value your time, you can level the floor with plywood. This method has some advantages.

The presented material has the following advantages:

The sheets are natural so they don't emit toxic substances and, accordingly, are considered environmentally friendly.
Plywood bends wonderfully, while cracks do not appear on it.
The material is characterized by equally good strength in all directions. Therefore, the floor after leveling can withstand heavy loads.
The good hardness of the material allows you to create a perfect flat surface to install laminate or linoleum.

Leveling the floor with plywood is done quickly, as the sheets have big size. With one plate, you can close a significant section of the base.
Plywood is well transported.
The material does not emit foreign odors.
The small mass of the product makes it possible to reduce the load on the floor slabs.

As you can see, plywood - perfect option to level the base. It will allow you to mount a laminate or linoleum quickly, which will significantly reduce the repair time.

How to correctly determine the height of the level differences?

This procedure must be performed to determine the zero level of the base. It is best to use for this purpose laser level. However, if it is not there, then you can use the usual building level.

To begin with, in the center of the walls at the same height, mark the points that you connect with one line. So you define the "horizon line". On it you will determine the zero level. After that, based on the smallest and largest deviation in terms of horizontal level. Video:

Naturally, the subfloor must be prepared for. If the boards have already been laid on the base, and they are in good condition, then you can leave everything as it is. Damaged and rotten elements must be removed. If necessary, it is necessary to eliminate the squeaks of the floorboards, it is better to fix the fasteners, check the heating systems (if any).

What tools are needed for the job?

To level the floor with plywood, it is necessary to assemble all those devices, without which the work cannot be carried out:

Electric jigsaw with the appropriate blade. It is useful for cutting plywood, as well as laminate.
Tape measure and pencil for marking.
Building level
Screwdriver.
Self-tapping screws.

Which alignment method to choose?

Leveling a wooden floor with plywood can be done in several ways. However, the quality of the future foundation also depends on the correct choice. You can define alignment like this:

If the vertical difference does not exceed 2 mm per 1 m2, then the subfloor can not be leveled, even if you lay.
With correctly laid floorboards and a uniform level difference, the height of which is no more than 5 mm, plywood can be fastened directly to the boards. This does not require additional elements. Please note that correct styling- this is the alternation of floorboards, which is carried out in accordance with the requirements of the standard.

Height differences that are in the range of 1-8 cm can be eliminated with plywood mounted on tape or point supports. That is, you will have to build a special crate or attach the material to the laid logs. In the first case, apply wooden beam. Please note that everything wood materials must be pre-treated with a special antiseptic impregnation.

With large level differences, you will have to completely remove the floor covering. If it was fixed on the logs, then they should be carefully examined. When choosing a leveling method, it is also necessary to take into account how much the procedure will reduce the height of the ceilings.

Features of mounting plywood without lag

Before using the presented material, it must be left in the repaired room for several days. Plywood must "get used" to the conditions in which it will be used. In this case, it is not necessary to lay the support beam. Instead, evenly protruding tubercles of the floorboards can be used.

In addition to plywood, this leveling method involves the use of either GVL. You should also decide on the thickness of the sheets. For example, if the differences are small, and the width of the boards on the base is 20 cm, then it is necessary to take plywood, the thickness of which will vary between 8-10 mm. In other cases, plates with a thickness of 1.8-2 cm may be needed.

The laying of the material is done as follows:

Install the bosses around the entire perimeter of the room, observing a small indent from the walls (2 cm).
Plywood should be mounted with a gap between the sheets so that it does not bulge when expanding and contracting. A distance of 3-5 mm is enough. Please note that the sheets must be laid according to the principle of brickwork. The joints do not have to match.
Now you can fix the material on the "ridges" of the base. Please note that the holes for the screws must be drilled in advance. This will make it possible to drown the fasteners. In addition, a metal corner can be used during screwing.

If the plywood sheets have a rough surface on one side, then the non-sanded side should look up. This will improve adhesion with the adhesive composition, on which the linoleum may be laid.

Features of leveling the base using a tape support

Here you can’t do without crates or lags. If you will fasten, then the supports should be located at a distance of 3 cm from the walls. The step between them is 40-50 cm. The laying technology is as follows:

Sample sheets. This is done without fastening. You just need to lay out the sheets on the supports, taking into account all the necessary gaps. If necessary, plywood should be cut. It is also advisable to number the sheets.
Now you should install logs against the walls. If raising the level is highly undesirable, then second-rate boards can be used instead of timber.
Installation of crossbars. They should be attached to the lags with self-tapping screws. In this case, the use of metal corners is desirable.
Setting the vertical level of the resulting structure. If the height of the lag in some places is not enough, you can raise them with sand or roofing material.
Final fixation of support bars, plywood flooring.

Please note that the space between the lags can be filled with insulation: expanded clay, mineral wool.

Features of alignment in other ways

Leveling a wooden floor with plywood can also be done with the help of small logs or pillars. In the first case, the difference in vertical level should not exceed 8 cm. To create unified system supports, short bars and slats are used. However, this method is very complicated, since it requires very great job by design calculation. It should be as accurate as possible, because you will install each support separately. If you want to lay linoleum in a large room, then it is better to abandon this leveling method.

For arranging the crate, cobbs from the usual wooden board, slats and plywood (). As a result, you should get a kind wood mesh, the dimensions of the squares in which will be 30x30 cm.

Please note that when using any of these leveling methods, one must not forget about underground ventilation. Otherwise wooden elements may start to rot. After the base is ready, you can begin to mount the linoleum or other coating.

Several factors influence the quality of the floor. Firstly, the correct installation, and secondly, the choice floor covering. But in order to ensure reliability, the floor must be properly prepared, which means that it must not be defective. To this end, it is leveled. There are many ways to fix this problem, but leveling the floor with plywood without lag is especially popular.

How to choose plywood for leveling

This material has large quantity positive qualities. But in order for plywood to fulfill its purpose, it must be chosen correctly.

First of all, the orientation of the fibers should be determined: longitudinal or transverse. In the first case, the fibers are located along the length of the entire material, and in the second - along the width. This moment is taken into account when leveling the floor so that they lie against the main movement.

Also plywood is selected for its intended purpose:

for construction, this is how the floor is leveled;
industrial, may be suitable for such purposes, but in quality it is inferior to the first;
packaging;
for furniture;
structural.

Depending on the room in which the floor will be leveled, attention should also be paid to the moisture resistance of the material:

FBA - an environmentally friendly type of plywood suitable for decoration living rooms, but the level of moisture resistance is low;
FC - average level moisture resistance, but direct contact with water is undesirable;
FSB - high moisture tolerance;
FB - due to impregnation with bakelite varnish, it has a very high resistance to aggressive environments, but this is also a drawback, since on the system warm floors start to stand out harmful substances, which is not entirely safe for the health of residents;
BS - special processing allows this species use in yachts, but it is not suitable for leveling the floor with plywood;
BV - the same plywood as BS, only moisture tolerance is slightly worse.

Before you level the floor with or without logs, you should carefully study the technology. This will help determine the type of material with which it will be easier to work.

One of the stages of leveling is surface grinding. But modern manufacturers produce products that can shorten this moment. And all because plywood can be unsanded (NSh), sanded on one (Sh1) or both (Sh2) sides.

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Preparing the base for leveling the floor

Before laying the flooring, the subfloor should be leveled. For this, a wet screed or plywood is used. But the second way is much easier and more convenient.

Plywood screed can be made tied or floating. In the first case, it will be a monolithic structure with the base itself, and in the second it will not.

With a connected screed, the material is fixed on the base due to self-tapping screws or nails, while the floating screed adapts to the logs.

There is a marking of the material that indicates the grade: 1, 2, 3 and 4. If the work is done with an external coating, then the first grade will be used, since it does not have any defects on the surface, and when working it is only required to sand and varnish . For rough work, the second and third grades are used.

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To level the floor with plywood without a lag, no special work or specific work is needed.

To fix sheets, you can use the following methods:

glue;
regulation.

For the first method of leveling the floor with plywood, a special adhesive solution is used. But it is intended for those cases when there is a screed on the floor, and the differences are small. But there is a peculiarity here: the screed must be dry so that the humidity is minimal. To determine this nuance, the surface is covered with a film and pressed along the edges. Accordingly, if condensation forms inside, then not all of the moisture has evaporated, and if not, then work can begin.

The regulated method has a more complex technology, so it is not popular.

It is best to use leveling posts to level the floor. In this case, wooden blocks are mounted under the bottom, and then the plywood is laid in two layers. The thickness of the first will be 0.2 cm, and the second - a little less. This design is not afraid of heavy loads. In addition, there is always the opportunity to dismantle the annoying coating and replace it with a new one.

The floor is also leveled with plywood in cases where it is planned to lay a laminate. This provides good ventilation and vapor permeability, which allows to extend the life of the coating.

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Carrying out work and the necessary tools

Tools that come in handy when leveling the floor:

jigsaw;
building level;
pencil;
ruler;
adhesive solution;
plywood.

The base can be plank and concrete.

The boards are fastened with a gap of 2-3 mm, and 2-3 cm should be left to the wall. In the first case, they should be additionally fixed not only with glue, but also fixed with self-tapping screws. And in the second mandatory point should be waterproofing.

If the work is to be done with the first type, then the following technologies can be used:

when lags are not used;
with installation of tape supports;
with lags.

In the first technology, plywood is fastened to the floor surface using an adhesive solution.

As for the second method, it’s worth the effort, since the plywood will be mounted on self-adjusting tape supports. In order to create them, you need studs that will be screwed into the floor. Next, a few nuts with washers are screwed on top, which are designed to rest under the plywood. When the studs are installed around the entire perimeter, the sheets are mounted on top of them, and with the help of wrench fix them at the required level.

The third option with lags is designed to work with a floor that has significant differences on its surface. The first moment is . Next, plywood is mounted on top of them. Such an installation is convenient in that it is possible to lay engineering communications in the underground space.

If the work is to be concrete surface, then special attention requires its preparation. Irregularities provoke the appearance of a creak, as the sheets will constantly rub against each other. In addition, this defect significantly reduces the service life. outer coating. For such cases use:

glue;
lags.

In order to choose one of these methods, you should decide what loads will be carried out on the floor. But it is best if plywood sheets are used with a thickness of 1.6-2 cm. In the case of more thin material you will have to lay it in a double layer, while it is important that the bottom one is thicker than the top one.

Leveling the floor with plywood is a proven way to significantly improve the condition of the subfloor and prepare it for laying the finish coat. This material (plywood) has excellent strength characteristics due to its composition. Plywood is a multi-layer "pie" consisting of veneer layers oriented in perpendicular directions and glued together.

There are many types of plywood. But for the installation of floors, ordinary, non-moisture-resistant plywood made of coniferous wood with the FSF marking is most often used. Phenol-formaldehyde impregnation provides excellent wear resistance and adds some moisture resistance to the material.

If we take into account that the price of such plywood is quite democratic, plywood is not subject to delamination and can be perfectly processed, it becomes clear why it serves the best choice material for laying sheets on the subfloor.

First let's talk about positive moments leveling the floor with plywood.

You can do it yourself.
A quick way to level floors.
Provides a strong and even base for any top coat.

But, like every technology, plywood flooring has its drawbacks, which you need to know and try to minimize.

How to buy plywood for floor leveling

If you plan to level the floor with new joists, then you can use one layer of plywood with a thickness of 12 to 20 mm, depending on the step with which the underlying board will be laid. If you plan to renovate an existing floor, it is best to lay two layers of sheets thinner. You can take plywood 10 mm.

As for the grade, it is chosen based on what it will be top coat gender. As a rule, sheets with edge defects and a large number of knots and wormholes grade 4-4 are used for laying the bottom layer of the subfloor. The top layer requires at least second grade plywood.

Plywood grade 4-4

If you plan to lay linoleum or pvc tiles, that is enough soft materials, then it is better to choose at least the second grade of the front side, or carefully putty all cracks and irregularities on it.

In order to purchase plywood for future work, you need to accurately measure the size of the room. Standard sizes plywood sheet can vary:

1525x1525 mm, area 2.325 sq.m;
1220x2440 mm, area 2.97 sq.m;
1500x3000 mm, area 4.5 sq.m;
1525x3050 mm area 4.65 sq.m.

If the room has simple form, then multiplying the length by the width, we determine its area. Now you need to divide the area of \u200b\u200bthe room by the area of \u200b\u200bthe sheet of plywood of the format that is commercially available, and find out the number of sheets needed.

For example, there is a room 5.65 by 3.8. Multiplying, we get an area of \u200b\u200b21.47 square meters. m. We have a choice to buy plywood 1220x2440 or 1525x3050. Dividing the area of the room by the area of \u200b\u200bthe sheet, and rounding the figure to an integer, we get that we need 8 sheets of the first format or 5 sheets of the second. The fact that some sheets will fit with trimming is not scary.

Premises complex shape it is better to mark according to a schematic plan. The layout of the sheets should be saved during work. You can immediately number the sheets and subsequently lay them in accordance with the layout.

Having decided on the quantity and format, you can compare economic indicators and choose the best purchase option.

How to level the floor with plywood on the logs with your own hands

This technology is used in two cases - where a new house is being built, and when repairing and leveling the floor in old housing.

You will need a minimum of tools– laser level, jigsaw or Circular Saw, square, tape measure, screwdriver and drill for countersinking.

Therefore, the first stage of work in the apartment - dismantling of the old finish floor and planks lying on the lags. Some of the lags may be in good condition and do not require replacement. They should be strengthened by tying additionally to the base with anchors. Where necessary, replace the beam. The horizon is controlled already at this stage. If necessary, lay under the sagging places of the gasket.

Sometimes the old logs are removed completely. This has its own advantages.

It is easier to set the lags to a new horizontal level.
You can slightly increase the height of the room.
You can install new logs with a pre-calculated step.

For the device lag use a bar of coniferous species. The room is tied around the perimeter, retreating from the walls - as required by the rules for arranging sound insulation, and the area is covered with longitudinal logs in increments of about 60 cm.

Important!

Dry wood is used for logs.
Under the lags you need a gap for ventilation.
By laying the lags on felt, noise reduction can be achieved.
Plywood during installation is fixed in such a way that the joint does not hang in the air, but lies on a solid support. Therefore, if the lag step is large, only the lag for quality styling not enough. Segments of bars are laid across, and this is done in accordance with the plywood format. The smaller the floor cell, the more reliable the floor will lie. Cross bars can be attached to the corners to the logs.
The insulation laid under the plywood will not only prevent heat loss, but also prevent the occurrence of sound vibrations. A layer of vapor barrier is placed on the insulation. And only then strengthen the plywood sheets.

First of all, they control the corners and calculate the dimensions of the extreme sheets, taking into account the unevenness of the walls.

Sheets are superimposed with a run-up, at one point 4 corners of the sheet should not be joined.
There is a small gap between the sheets, 2 mm is enough.
At the walls, plywood should not reach the edge, leave a free distance of about 2 cm, which will subsequently cover the plinth.
Plywood is attached to the bars only with self-tapping screws.
Fasteners suitable for laying plywood are calculated according to its width. To choose the length of the self-tapping screw, multiply the width of the plywood three times.
So that the caps of the self-tapping screws do not protrude and do not spoil the future floor, the holes for them should be countersunk.
Plywood is fastened with an indent from the edge, at least 20mm.
The step between the screws is left small, about 20 cm.
Plywood is fixed by laying in a strip. Edge sheets may need further adjustment. With a jigsaw, cut holes for pipes and ledges in the walls.
Having completed the laying of plywood, they get an even, warm and durable floor. Further work With plywood base may consist in puttying irregularities, if required by the floor finish.

How to level the floor with plywood without lag

Sometimes you can find recommendations to lay concrete screed plywood to improve the thermal properties of the floor. it simple work, which will allow and even out small irregularities in concrete base and prepare it for laying the laminate.

You can make it yourself using a perforator, sawdust, epoxy, oil paint or drying oil.

The concrete base is inspected, pronounced bumps are knocked down. A mixture of sawdust and resin is applied to the holes in the concrete. They try to level the surface to the horizon.
Sheets of plywood are painted over with paint or drying oil. It will be protection bottom side from bacteria and mold. The same paint is applied to the base after smoothing the relief.
Plywood sheets are laid on concrete, fixing them with self-tapping screws through dowels. You'll have to work hard, completely sinking the fasteners into plywood. If this is not treated properly, the surface of the laminate or other finishing material will deteriorate over time. For such alignment, you can use not the thickest plywood. If the height difference is insignificant, and one layer will be enough, then 12 will do just fine.
If you need to level a large horizontal run-up, then laying two layers of plywood, with layer-by-layer alignment, will give much better results. Then it is worth using a sheet with a thickness of 10 mm.

What should you pay attention to?

Sheets are never joined in a cross, only a T-shaped joint is allowed.
Dowels are rarely hammered.
A minimum gap is left between the sheets of plywood, which is closed with sanitary tape.
A larger gap is left near the wall, not less than 10mm.
Old wooden floors are also leveled with plywood.

If the unevenness of the floor does not allow the laying of a laminate or cork, but it does not collapse or loosen, you can use plywood leveling without a log. The technology of such work is not complicated, but requires attention and accuracy.

Of the tools you will need a screwdriver, a jigsaw, a level, a tape measure and a square.

First of all, the horizon is marked, and for its constant control, strings are pulled. The floor is prepared by puttying with an elastic composition, you can also use silicone sealant, and even mounting foam. If some boards are lower than others, you will have to correct this.

A common leveling method is to use sand or sawdust mixed with epoxy resin. The boards are covered with a layer of vapor barrier and plywood sheets are laid in two layers. Attract plywood to the boards with wood screws. It is better if the holes are pre-countercoated. Self-tapping screws are placed in a continuous way, with a distance of 30-40 cm between them.

And in this case, do not forget that the sheets are placed with a small gap.

The floor is an important part of any building. It must be smooth, as well as durable and attractive. Highly milestone when repairing an apartment, the flooring becomes leveled. For the installation of any material, regardless of its type, an even base should be built. How long the finish coat will last depends on its quality. Leveling the floor with plywood under the laminate is carried out quite quickly. To do this, you need to know the technology of work.

Common Ways

When leveling the base under linoleum, parquet or tiles, different ways. Each method has a certain number of advantages and disadvantages. They should be considered in more detail. It is worth highlighting the following ways to level the base for the floor:

Using beacons. This method of leveling the floor with plywood is very popular. It is usually used when laying the floor in spacious rooms. This method consists in the installation of beacons and the subsequent alignment of the screed. The main advantage of this option is to obtain the final state. As a result, you can get a fairly high-quality and even coating. The disadvantage of installing beacons is that the new surface will dry for a month.
Self-leveling floors. The peculiarity of this method is the use special solution which is evenly distributed over the floor. The result is a smooth and durable surface. However, these materials also have a significant drawback. This method is not used to level floors that have an unevenness of more than 35 mm.
With the help of an additional crate. This method is simpler and faster. It is made using ordinary plywood. During the work, a lot of effort is not expended.

The last method is worth considering in more detail. It is becoming increasingly popular due to its accessibility and simplicity.

Choice of plywood sheet

Plywood is an indispensable material used in construction. This can be explained by the following features:

relatively low price;
simplicity and high speed of installation;
the ability to use plywood panels when eliminating numerous irregularities in the base for linoleum or other coatings.

When choosing plywood sheets, you need to pay attention to the following material parameters:

panels must be made of environmentally friendly materials;
it is necessary that plywood be moisture resistant;
to save time, you should choose a ground material.

Plywood sheets vary in quality. Best Panels do not have defects. The maximum that is allowed in the manufacture of such sheets is minor cracks. On medium quality plywood, you can see the remains of glue, various wood inclusions. Low quality products are different, which have many different defects.

The price directly depends on the type of material chosen. The higher the quality of the material laid under the linoleum, the more reliable it will be when performing work. Usually high quality sheets are chosen for leveling the bases.

Types of alignment

To make the base for linoleum, parquet or laminate as smooth as possible, you should use 2 methods:

crate alignment - in this case, logs are used;
without a crate.

The base of the floor covering can be made of concrete and boards. Depending on the material of their manufacture, the alignment process will differ.

When laying plywood on concrete floors, it is necessary to carefully prepare. This is due to the fact that concrete is difficult to pour. First you need to determine what kind of humidity such a surface has. For this purpose, a concrete film is laid and pressed. After 2-3 days, it is necessary to check whether condensation has appeared under it. If it is available, the plywood with which the surface will be leveled should be treated protective equipment from fungus and mold.

Alignment with lags

Such work has certain features, which should be taken into account when preparing and performing installation procedures. To work, you will need to use the following tools:

roulette;
self-tapping screws;
jigsaw;
screwdriver

Before laying plywood, it is necessary to prepare the base. First, the old coating is removed, the concrete is vacuumed and cleaned. The surface must be dry. Now, with the help of the level, it is necessary to mark the boundaries of the new coverage. After that, you can start preparing the lag. For them, wooden bars are chosen. During the acquisition, you should figure out what kind of wood the elements are made of.

Under the bars, it is necessary to place linings with a width of 15 cm. Their length is usually 20 cm. The logs must be laid across the light rays falling from the window.

Heat and sound insulation is laid between the bars. In this case, the floor surface will be silent and warm. During the installation of the log, it is necessary to leave a certain space between them and the walls. This is necessary to compensate for the thermal expansion of the floor elements.

Lathing is carried out at a precisely defined floor level. After sheathing the concrete base with lags, it is necessary to start laying sheets of material. The panels are divided into parts 75x75 cm.

Such pieces of material must be screwed to the lags. Leave a gap of 4 mm between the plywood. It is needed to eliminate squeaks while moving across the floor. Wooden decks have the ability to change their size. This is due to the deformation individual elements designs. Due to the presence of gaps, it will freely change dimensions, while maintaining its previous shape.

For fixing plywood, self-tapping screws should be prepared. If necessary, level the floor in the hallway should lay out the logs across the movement. This will provide greater reliability and stability of the coating.

Leveling on the crate is used for floor level differences of more than 50 mm. In the case of minor differences (10 mm or less), the plywood is laid directly on the concrete base.

Without using lag

For such work, plywood with a thickness of 18 mm is selected. This installation method is simpler and more popular than the previous one. Sheets are fastened using:

regulations;
adhesive formulations.

If glue is chosen for fastening, it is worth considering that the surface should not have large height differences. Before application adhesive composition the surface is dried and dust-free. Only under such conditions can reliable and durable fastening of plywood be achieved.

The regulated method is not very popular. For this method, special racks are used, with the help of which the surface is leveled. Plywood is laid on wooden blocks in 2 layers. The first one should be 0.2 cm thick. The second one is a little thinner.

For wooden floorboards, plywood is very easy to install. Sheets are screwed to the base. The main goal is to have high strength. For this method, plywood is purchased with a thickness of at least 10 mm.

When leveling the floor under linoleum, it is necessary to step back from the wall by 20 mm. A distance of 8 mm should be made between plywood panels. When laying sheets, imitate brickwork. Leveling the floor with plywood without a lag is quite simple. The main thing is to follow the instructions.

Surface finishing

At the final stage of work, finishing surfaces. Before work, you should check how correctly the plywood was laid:

carefully
. the entire floor surface is inspected;
the presence and size of the gaps that are between the panels are checked;
plywood sheets should not be tightly mounted to the wall;
using the building level, the horizontalness of the surface is checked. The maximum allowable difference is 2 mm

The entire floor area is tapped with a mallet. In the event of dull sounds, remove the plywood sheet and install it again. A dull sound indicates the presence of air under the sheet. Leveling the concrete floor with plywood is carried out taking into account the characteristics of the material and coating.

When the check is completed, and all defects are eliminated, you can begin to seal the joints with putty. A primer is applied on top of it.

conclusions

Summing up, we should remember a few basic rules that apply when working with plywood panels:

Plywood is susceptible to moisture. As a result of a long stay in a humid room, the sheets begin to deform, changing their shape and size.
There is no need to overpay for top quality plywood if it is to be used for surface leveling.
For ease of working with panels, they are sawn into smaller elements. It is easiest to work with sheets of plywood 75x75 mm.
If plywood is laid directly on the base, it is better to choose sheets with a thickness of at least 18 mm.
During the installation of plywood sheets with lags in the hallway, the bars are laid across the room.
Panels are screwed on. When choosing this method of leveling the surface, it should be taken into account that the level of the floor will rise.

As you can see, there are several ways to level the floor using plywood sheets. They are used in the case of concrete and wood bases. This method is very affordable, as well as durable and reliable. After preparing for work and necessary calculations will be fulfilled, you can go to hardware store for materials.

You can additionally learn how floor leveling is performed from the video: