I would like suggestions for a basement sauna.The room is framed and plan to use Cedar t&g. What should go behind the cedar? I want to keep the heat in,and also stop the heat affecting the floorboards above.It will be a dry sana so I don’t know if moisture will be a problem .

Thanks for your advice . I get the idea that sheet rock is not needed but one should put insulation, then moisture barrier. then furring strips, then cedar.The living area is above the sauna and when built there would be dead space between the sauna and the floor joists.I am concerned about heat build up there from leaking hot air and radiation.

Iam reposting my original posting with a follow up as the first set of replys moved off the question.

Thanks Gordon