Some basement insulation questions
What would i gain on a 60's built home with NO exterior/interior basement insulation (just some batts around the rim joist) IF i just insulate the exterior with 2 inch foil faced foam board from the siding down a foot into the ground??? 24 inches total... (i'd cut a sheet length wise).
ANy ideas if id save much?
... I don't care to keep it very warm every (maybe 60F tops?)...