Many professionals consider plywood the bestrough base for the floor. This material is distinguished by its strength, it retains heat and does not undergo deformation. Due to the fact that the plywood is made of wood, its ability to support a healthy and comfortable indoor microclimate. The technology of repairing the floor with plywood is quite simple, so if you want, you can do the work yourself, thus preventing unnecessary costs. 
Plywood today is often used forleveling or devices of rough floor. In the event that you first need to repair the floors with plywood, it is very important to carefully study the instructions before proceeding to the working process. Despite the relatively simple technology of repairing floors with the help of sheets of plywood, the task should be approached with all responsibility.
The stage of plywood laying and all about the way it is fastened
For fixing plywood sheets to the baseapply glue and dowels. Adhesive composition, which has a water base, is distinguished by the absence of a pungent smell, and it takes several days to dry it. For those who planned to finish the repair of the sexes in the shortest possible time, this option may not work. 
Existing dimensions of plywood sheets. Glue, which is basically a solvent, requires shorter periods of drying, while many frighten its sharp unpleasant odor. If you decide to give your preference to him, then, after the repair of the floor is completed, the room should be well ventilated. The best option for repairing the floor with plywood is a two-component glue composition. It should be noted that this method is very popular among high-class specialists. Back to contents</a>
Initial stages of repairing floors
Repair of floors begins with screed. For the device floor screed, you can choose one of two methods: a) dry, b) wet. It should be noted that special requirements are imposed on the quality of the screed, first of all, when the work is done, all the conditions of the technology must be observed. The base must be as flat as possible, otherwise the coating may deform with time, a creak appears, which will significantly shorten the life of the floors. 
Sorts of plywood. If the floor screed has been made according to all the requirements of the technology, the moisture level of the substrate is not higher than 1% and the issue with thermal insulation and waterproofing is resolved, you can be sure that the finished floor will be dry, warm and will last a long time. Very often, plywood is used as the basis for parquet (the most optimal option in this case is FK 4/4). Many specialists prefer to use plywood sheets, which thickness is 1 cm, for a repair of the floors, sheets with a thickness of 12 mm are not bad. In addition to the fact that such material is strong enough, it is also flexible, and this is a very important condition, as the sheets of plywood take on a very heavy load. Plywood sheets consist of a multitude of layers, an increased level of moisture is contraindicated, otherwise they will begin to separate in time. That is why, before you begin to repair the floors with plywood, check for moisture overlapping concrete. This can be done in the process of removing the old finish of the flooring. For this purpose, a large piece of polyethylene film should be laid over the previously cleaned substrate. At the edges of the load, while trying to achieve maximum tightness, leave the middle of the film loose. In the event that after one week the inner side of the polyethylene is not covered with condensation, you can safely proceed to laying the wooden floor support. The accumulation of condensate is an indicator of high humidity in the room, it will be necessary to provide overlapping with additional waterproofing. Back to contents</a>
Stage of laying plywood sheets
Plywood laying on the concrete floor. Repair of floors with plywood is carried out with the help of such materials and tools as:
- sheets of plywood;
- soil composition (Primer);
- glutinous composition;
- mastic;
- dowels;
- self-tapping screws;
- Brush (for applying Primer);
- marker;
- a hammer;
- Sander;
- drill;
- screwdriver.
Before performing the repair of the floors, plywood sheetsit is necessary to cut. For this purpose the premise is preliminarily measured. When cutting the material, keep in mind that a gap of 1 cm should be left between each sheet of plywood (the gap between the panel and the wall surface should be 2 cm). Take care that the material does not touch the wall. Laying plywood with the required distance will prevent "swelling" the finished floor, which can occur due to changes in size due to temperature changes and increased humidity. It should also be noted that due to the use of small-sized blanks, the floors will be more stable and reliable. Having finished the stage of cutting the material, make sure that the plywood has not started to separate at the sawing places, since such workpieces are not suitable for floor repair. Next, you can start laying the sheets, while avoiding a single joint of four sheets at once. The technology of laying the material during the repair of floors is similar to brick laying (with a slight shift). Fit each sheet of plywood, number each individual element. On the basis of it, it is necessary to draw a diagram according to which the cloth will be placed, then remove all the blanks to the side. Next, floors must be carefully prepared, while removing the remains of building material - mortar, paint, etc. Using a powerful vacuum cleaner, get rid of small debris and dust. Wetting the floors with water is by no means permitted, as this will damage the wood material. 
The scheme of leveling the floor with a moisture-proof plywood. After the base is cleaned of all excess, it is possible to begin applying the primer (ground composition). The composition of this material is similar to the composition that is used to glue the plywood. The primer copes with several tasks at once: by impregnating the substrate well, while capturing every remaining microscopic speck of dust, it helps to strengthen the surface and creates ideal conditions for good adhesion with other materials. This method of dedusting can significantly increase the adhesion of plywood sheets and adhesive composition. In addition, Primer reinforces the concrete surface, prevents its destruction and detachment, accordingly, the dust will not form more. If the floor is to be repaired in a large room, the soil composition, as well as the laying of sheets of plywood, should be applied in certain parts. You can cover the base of a small premise with a primer in one step. As you know, apply the primer shortly before stacking the plywood sheets. Keep in mind that walking on the treated base is contraindicated. Back to contents</a>
Stage of plywood laying by own hands
Over the base treated with PrimerUsing a notched trowel, a pre-selected mastic should be applied. The material layer should have a thickness corresponding to the recommendations given on the package. Most manufacturers warn that the layer should not exceed 2 cm. A sheet of plywood should be laid over the mastic. Self-tapping screws with plastic dowels are used for its fastening. Mount the panel is necessary around the perimeter and diagonal. The dowels are installed in steps of 20 cm, at the edges, recede 2 cm. The screws should be chosen so that their length is three times the thickness of the plywood. Fastening of blanks should be carried out as carefully as possible because hammer blows can split them. In order to avoid such unpleasant consequences, the base, together with the cloth, should be drilled with a drill with a diameter that must coincide with the dowel, for further operations a drill with a large diameter is used. In such holes it is enough just to hide the screws with the hats. After the repair of the floor with plywood has come to an end, it remains to perform the stage of preparing the surface for laying the parquet. Preparatory work includes grinding, for which it is recommended to use a specially designed grinder. It is very important to achieve absolute smoothness of the surface, which will not have such defects as burrs, chips, height differences in the seams area and roughness. </ ul>
