Rim joists are above grade, so it makes sense to insulate the joists to the same level as above-grade walls. At the rim-joist area, many building components come together-the foundation wall, the mudsill, the rim joist, the subfloor-so it's also important to seal all cracks against ...
Rim joist.Insulating and air-sealing this perimeter zone is important because it’s a major source of air infiltration and conductive heat loss. Walls.SilverGlo® rigid foam insulation is the perfect choice for insulating crawl space walls. This upgrade moves your home’s thermal boundary to th...