Insulation for your home sauna

Indoor saunas with 2"x4" studs do just fine with R13 insulation. Any exterior walls with 2"x6" studs should still have R19 insulation. Ceiling insulation should be R26 or greater.

Also VERY IMPORTANT, and a step never to be skipped is covering your studs with the Sauna Foil Vapor Barrior. It reflects heat back into the sauna and keeps moisture from seaping behind your cedar.

By the way, the prefab home sauna kits we sell come pre-insulated.