How should walls be prepared for a Pre-Cut Sauna to be installed?

All walls and ceiling should be insulated. Insulation “R” values are dependent on the size of the framing studs that are used. All walls should be insulated with R-11 minimum and ceiling with R-13 minimum. Types of insulation commonly used for a sauna are rolled batting (faced or un-faced) or a rigid foam board. Also a foil radiant barrier could be used to help reflect heat and possibly make your sauna more efficient. This foil should be applied to the inside framing of the sauna. The wall framing generally consists of 2 x 4 or 2 x 6 wall studs placed vertically every 16 or 24 inches, from center to center. Extra studs provide nailing area and sturdy support wherever walls intersect, such as at corners. Framing material can be standard fir or spruce studs. Metal studs can also be used, but there will also need to be material attached to the metal studs as a nailing surface for the sauna material.