This specific aluminum foil sauna vapor barrier is a necessary components for sauna room construction.  This aluminum foil sauna vapor barrier is 255 square feet, enough for an entire 6x8 sauna room.  This aluminum foil sauna vapor barrier will protect the building structure by preventing moisture from absorbing into the interior walls. This aluminum foil sauna vapor barrier is designed for high temperatures and assists by reflecting radiant heat back into sauna room. Sauna Foil Vapor Barrier is also commonly used in walls of steam rooms.