Sealed Vents, Sill Plate, and Rim & Band

The open vents lining the foundation wall are not only covered by the Foamax boards, but precisely cut foamboard pieces are placed in the interior of the vents and sealed with can foam. This cuts off the constant flow of outside air and moisture that would otherwise enter the crawl space and affect the air quality and relative humidity. The rim band and sill plate are also sealed with foam. These are major areas where outside air and moisture can flood into the crawl space.