The need for insulation of the ceiling is explained by the fact that most of the heat from the house, apartment "tries" to go outside precisely through it. According to reports, this can be up to 40% of heat loss.
The answer to the question on which side to do it - from any. The exact choice depends on many conditions. For example, when the house inside is renovated, the walls are lined with plasterboard sheets, then no one will break them. Insulation of the ceiling in such a situation is performed from the attic.
In favor of the latter is the fact that any insulation work inside the premises is associated with garbage, dirt, dust. In addition, insulation from the attic is more effective, since it requires less material consumption, allows you to perform more reliable work around the perimeter of the roof, in the axils of the floors.
By insulating the ceiling, they achieve not only a reduction in heat loss. The layer of insulation material serves as an excellent sound insulation, preventing the sounds of rain, wind from penetrating inside the premises. In winter, sometimes it serves as an obstacle to the exit of warm air outside, and in summer it does not allow the heated air to descend through the ceiling.
Ceiling insulation work begins with attic cleaning, beam cleaning, floor slabs from existing old insulation. Different materials are used, characterized by low thermal conductivity. In addition, they must have moisture resistance, resistance to burning, long preservation of thermal insulation properties, environmental cleanliness, low weight.
Most often, the ceiling from the attic side is insulated:
- Mineral wool (glass, basalt), produced in rolls, sheets;
- Bulk materials - expanded clay, sawdust, fine chips;
- Styrofoam, polystyrene foam, polyurethane foam, penoizol;
- Ecowool made from cellulose.
The best option, experts consider the insulation of the ceiling at the same time as foam and mineral wool. Lay the layers of material between the runs on a waterproofing layer arranged from the film. The width of the latter should be sufficient to cover the distance between the runs and be wrapped up in the latter. The edges of the film are fixed to the beams with trims.
After laying a layer of foam sheets. They are placed tightly one to the other, fill the seams with mounting foam. After drying of the latter, a vapor barrier from the film is placed on top and covered with sheets of mineral wool. They fill the entire space between the runs.
The attic is often used by residents for different purposes. Therefore, it is advisable to arrange a kind of floor from edged boards, OSB boards on top of the insulation.
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