Homes with a crawl space or a basement have rim joists on each level. Homes on a slab do not have rim joists on the first level. There also are the full-length outside joists on each level, which fall into the "need to be insulated" category. Any space or cavity exposed to the ou...
The US Environmental Protection Agency (EPA) estimates that air sealing a home and adding insulation in the attic, floors over crawl spaces, and accessible basement rim joists can save an average of 15 per cent on heating and cooling costs, or an average of 11 per cent of total energy cost...
Todd, when insulating rim joists, do you recommend XPS, Polyiso, any other type? Any advantage of one over the other? Thanks! Reply Todd Fratzel I recommend Polyiso, more Rvalue, and also some radiant benefit. We don’t use it against concrete as the foil face reacts with concrete....
I found some information on another site about insulating rim joists, which suggests cutting pieces of 2 inch extruded foam and sealing them in with caulk. I am sealing the joints in the pocket and then sealing the pieces of insulation in. Do you have any suggestions on this topic? I live...