Double bubble insulation consists of two layers of polyethylene bubbles between two metalized coatings, effectively preventing frost and condensation in various structures.
To install insulation in a crawl space, cover the vent openings with crawl space vent covers, seal the rim joists with rigid foam board insulation, and use foam sealant to seal gaps between the crawl space wall and sill.
Foam boards are highly effective for insulating exterior walls, basement walls, attic hatches, and other parts of your home.