Technology of installation of a water heat-insulated floor.
The popularity of warm floors in homes and offices is growing steadily, and the construction business requires more and more craftsmen who are able to quickly and efficiently assemble it. There are several types of warm floor, but today the most popular of them is water-heated floor.
It is important that the installation of a heated floor can be done in two ways. This is either a concrete or decking installation system. Most often, when laying the water floor masters use exactly the first option, that is, the concrete system. Its essence is that the pipes that ensure the functioning of underfloor heating are poured with concrete from above to eliminate the use of any additional heat distributors.
Concrete laying is done in several stages. For a start, the room under the warm floor should be divided into zones. Their number will depend entirely on the size of the room. Zoning is done in order to compensate for thermal expansion of the screed to avoid cracking it.
After that, the base of the floor must be covered with insulating layer.
This must be done so that the heat does not go down, but rises up, heating the air in the room. The insulating layer can be created from any material used for the purposes of thermal insulation in construction. In all respects, the most optimal material for thermal insulation is polystyrene or polystyrene, and also penoplex is often used. The requirements for the thickness of the insulation layer - it should be more than 30 millimeters in thickness, and its density should be at least 35 kg per cubic meter. After that, the entire perimeter of the room is lined with wound tape, preventing the expansion of the concrete screed.
The next stage of laying the floor will be the installation of reinforcing mesh under the heated floor .
Choose a grid of 150 to 150 millimeters based on the contour of the pipes. Sometimes a double reinforcement method is used here, i.e., the mesh is laid both under the pipes and above them. It is possible to lay pipes of a heat-insulated floor on the reinforcement grid laid by the first layer.
Laying options may be different, it is determined by a pre-prepared project. Basically, the method of installation is chosen based on the size and geometry of the room under the warm floor. The laying step can be from 75 to 300 millimeters. The pipes are fixed on the grid with plastic clips. In some places (where the seams pass), it is necessary to close the pipe with a protective corrugated material that will act as an obstacle to mechanical damage to the pipe.
The main schemes for laying pipes of a heated floor are a single snake, a double snake, a spiral or spiral whose center has an offset. Premises up to 20 square meters in size are laid in one loop, but if the room is larger, double loops should be used.
Two types of pipes are used: polyethylene and polybutene. Both species have corrosion resistance, flexibility and durability. The average price of one meter 60-70r. Per square meter is spent in the area of 3 meters of pipe. The cost of laying 1 square. 200-250r.
The next stage of laying the floor will be the pressure testing of the heating system. Here it is necessary to carefully check all parts of the pipeline in terms of their tightness. This is necessary in order to exclude the presence of any damage to the pipes that could have occurred during their installation. After the master is convinced that the system is fully operational, you can begin to pour the concrete screed.
At the same time, it is necessary to maintain the room temperature in the room, and to keep the system under pressure at about 4 Bar. Leave it under pressure for a day. Concrete screed is made of sand concrete or cement-sand mortar. The screed must be poured so as to be above a warm floor at a height of more than 30 mm. Cement screed should be left alone for 8 or more days before it is completely dry. After this, water can be supplied to the floor system, first cold, and then slightly increasing the temperature.
The last stage is the manufacture of a clean floor covering.
Here you should choose those materials for flooring that are specifically designed for use with heated floors. Tiles for such laying can be any, but coatings such as laminate or parquet should have a certain measure of resistance to heat transfer.