There are different types of insulation, and each type will work well in some applications and poorly in others. Builders began using fiberglass batts to insulate crawl spaces many years ago, before newer types of insulation had been developed. Today, we know that fiberglass performs poorly when installed between crawl space joists. In fact, if often ends up as a moisture-soaked mess on the crawl space floor.
Three “target areas” for new crawl space insulation
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 the foundation walls, which makes your home more comfortable and your HVAC system more efficient
Floor. If you live in an area where the ground freezes during wintertime, TerraBlock™ crawl space floor insulation is a smart upgrade to install. It can be installed over a dirt or concrete floor.