Warming of ceiling in owner-occupied dwelling has the features. As heat insulator it is possible to use both loose, and dense non-hygroscopic materials. Works on warming are performed on both parties of the top overlapping.
Warm air has property to rise to ceiling. Here it or is cooled because of badly warmed overlapping, or leaves the room through slots, or remains in the house. Therefore the ceiling in owner-occupied dwelling was always tried to be made hermetic and well warmed.
Having risen by the attic, the first that needs to be investigated, it is integrity and durability of boards which have sheathed the top overlapping of the house. If they do not demand repair and replacement, examine places of joints of floor with rafter system. All found slots fill with polyurethane foam. If between floor boards there are wide gaps, arrive also.
Further, start overlapping warming. For this purpose it is possible to choose or bulks (haydite, the foam crumb, dry bank sand, sawdust), either sheet polyfoam, or glass wool (mineral, basalt and other modifications of fibrous heaters). If it is decided to use sawdust or excelsior, for prevention of rotting of this material it is mixed with lime "slaked lime" in proportion 1:25. Loose heaters lift on the attic and make dumping, evenly distributing them on the surface of overlapping. For regions with warm climate there is enough layer thickness in 10 cm, for northern – not less than 20 cm. If as heater use mineral wool or sheet polyfoam, it will be required to make furring of the boards laid on edge. At first mount longitudinal lines. Depth of apertures between boards has to correspond to heater thickness. For example, if polyfoam 10 cm thick is used, board width furring has to be equal to 10 cm. The distance between lines of sawn timber has to be equal to heater width. Longitudinal lines strengthen cross. Process of warming of ceiling of owner-occupied dwelling will be less labor-consuming if furring is made in the form of the cells corresponding to the heater sizes. If sheet polyfoam is used, gaps between it and boards of furring fill with construction foam which has to be frost-resistant and moisture-proof. Plates or rolls of mineral wool cannot be stamped as in this case air will come out and heat-insulating material properties considerably will decrease.
Warming of the lower part of ceiling overlapping is less effective, than top. This option is used in case works from attic-floor room are impossible. For warming of ceiling from within the room it will be required to make furring of wooden bars or the metal section used in works with plasterboard. As heater use polyfoam or mineral wool. Along with mounting of furring to surface of ceiling fix paper roof covering (paroizolyatsionny material), pressing it to overlapping by bars or metalprofile. Having laid heater in cells, the ceiling is sheathed lining, plasterboard, moisture resistant plywood. Then perform finishing work.