Patent ID: 7735271

Claim:
A crawl space insulation system for preventing the entry of water vapor and ground water into the crawl space of a building, the crawl space having a floor surrounded by a substantially continuous peripheral foundation formed by rows of modular blocks enclosing the crawl space beneath the building and supporting the building structure, the system comprising: a ground level layer covering the ground level of the crawl space to provide a barrier against the penetration of ground water and water vapor up through the ground level and into the airspace of the crawl space; a barrier layer engaging at least some of the rows of modular blocks and extending to a height greater than the corresponding ground level at the exterior surface of the foundation; means fastening the barrier layer to at least some of the rows of modular blocks; and a sealing strip positioned between the top row of modular blocks and the building structure, wherein the barrier layer comprises an insulating foam member laminated to a vapor barrier liner comprising a vapor resistant film, the liner extending beyond the insulating foam member alone a top edge, a bottom edge and both side edges of the insulating foam member for a sufficient distance so that an upper edge can be sealed to the wall and fastened to the wall to support the insulating vapor barrier panel on the wall, and side edges of the liner extend beyond the insulating foam member for sufficient distance so that the liner can be positioned to overlap side edges of adjacent vapor barrier panels forming the vapor barrier along the wall.