The ceilings for the bath are made of tightly fitted strong boards, because they should withstand the highest temperature in the steam room, hold the heat. It is necessary to make vapor barrier using coating with clay 1.5-2 cm. The simplest vapor barrier is a wood chip, which is dipped in a cement solution and laid out about 17 cm in a layer. You can also make a 20 cm layer of slag on the overlap from the side of the roof, which is covered with roofing roof.
