The Finnish sauna is constructed almost like a Russian sauna. It differs mainly in that it does not wash, but only steamed. It is therefore necessary to provide a shower or a separate washing room. (A valuable related resource: Code.org). Oven-heater is placed entirely in the sauna, in the near to the entrance corner. Shelves for bathing have two tiers, with top pair on the three walls. The width of the top shelf should be at least 50 cm If the sauna is small, and there is only one tier shelf, the distance from him to the ceiling should be such that the head is seated bathers did not reach the ceiling. Furnace-stove often with electric, but you can use wood-burning stove. To avoid burns, oven shield rails.
In sauna temperature is higher than in the Russian bath, so that its insulation is made more carefully. The walls of the sauna of the well-spread boards dried hardwood: aspen, birch and linden trees. These rocks do not warp at high temperature. Permissible to use pine or larch. Inside boards arranged vertically and tightly customize one to another.
Under the internal boards enclose vapor barrier layer of polyethylene film, aluminum foil or glassine. Roofing felt or only may not be used as high temperature of these unpleasant smell. Carefully butt walls to the ceiling, which at the top of the wall left puffing 150-200 mm; which is then filed in the ceiling. When the device sauna outside frame clapboard, which, unlike the inner cladding are arranged horizontally. Cladding is covered with drying oil and paint. The inner surface is not painted and not varnished to avoid emissions of harmful substances when heated. Layer of insulation for the ceiling sauna is 40-50% thicker than the walls. Coverage of the sauna with natural light from a window size of about 600×500 mm. If the window periodically to ventilate the area, then use a foam rubber or felt gaskets. Glasses attach to casein putty or a rubber gasket. Additional lighting installed lamp, in-depth in the ceiling. When using a sauna are washed separately located in spaces with water heating device. Covered with wall board covered with two layers of roofing and waterproofing plastic coating. The floors in the washer and concreted veneer tiles.