xps and rim
I was reading thru some posts re: XPS and the RIM.
Lets make sure we are talking about the same thing. My XPS will sit against the concrete. The top ledge of the concrete has the framing of the house resting on it...ie the joists sit here and run from one side of the basement to the other resting on an I beam in the middle. Is this waht you are talking about? I have fg insulation is all my joists throughout the basement...ie under the 1st floor. Its also in the nooks and crannies where the joists rest on top the concrete. Are you suggesting I remove the fg here and barracade the area with XPS? What is the down side to NOT doing that...1)its a lot of work and 2) what if I ever need wiring or piping run thru one of those....also a bunch of those have piping or dyer ducts etc running thru them already and that would be tough to XPS around....even a fire hazard no...plus would you not need to drywall over all those 16"w pieces?