The best version of the insulation when warming the ceiling, of course, is foam slabs, but the rolled mineral insulation is also suitable. As usual, when warming, a layer of vapor barrier is laid, which looks like a foamed polyethylene with foil. Polyethylene is laid with foil to the insulated room and attached to the beams using a stapler. After which they begin to lay insulation. In the case of polystyrene, stoves in two rows are laid so that the upper row overlaps the joints of the lower. The joints of the foam plates are compacted with mounting foam. After the foam hardening, the second row of plates is laid. After which waterproofing is laid from roofing material or parcham. All the insulation of the ceiling based on foam is ready.
