Rim joist / Discussions

...joist space, he then insulated against the rim joist and under the heat runs, then wrapped from the mud sill to the underside of the plywood on the interior of the first joist and sealed the poly to the plywood with acoustical caulk, we will now spray foam the concrete walls below up to and over the exposed mud sill to...

...joists are embedded in the poured foundation. We would like to improve insulation and one of the leakiest places is at the edge of the foundation. We were thinking to insulate from the inside - many contractors suggested blowing foam to fill up those gaps - but I also read that effectively sealing off the rim joists co...