Saunas are getting increasingly popular in North American households . Making a panel-built sauna bath may need at least few hours , getting it to an ideal week-end plan . Our panel-built sauna available in a pack that supplied all the things we required for installation . The walls and ceilings are prefabricated panels that are complete on each side with tongue-and-groove boards , and are insulated inside . We are able to have in addition had plywood paneling on the outside in case we just want to coat the external areas.