Patent ID: 7856767
Filing Date: 2010-12-28
Classification: E02D

Abstract:
1. A water-barrier and drainage system for preventing the penetration of water vapor and ground water into the crawlspace environment of a building, said crawlspace environment having a floor surrounded by a substantially continuous peripheral foundation enclosing said crawlspace environment beneath the building, said system comprising a continuous embossed plastic drainage panel disposed against an upward facing surface of the floor so that the panel covers the upward facing surface of the entire floor of the crawlspace so that the panel defines a continuous barrier surface that prevents penetration of ground water and water vapor there through and prevents penetration of groundwater and water vapor up through the floor and into the air space of the crawlspace, said plastic drainage panel being embossed to provide a plurality of spaced protuberances at the underside thereof forming legs which support the drainage panel spaced from the floor of the crawlspace to provide a water flow space adjacent the floor for the drainage of water and water vapor which penetrates up through the floor of the crawlspace or through the walls of the crawlspace, wherein said drainage panel includes vertical extensions which extend vertically up against the interior peripheral foundation to a height above the floor/foundation interface to provide a continuous barrier against the penetration of exterior groundwater through said foundation and water vapor from said floor and into said crawlspace environment while providing a water flow space between the drainage panel and the foundation and floor for the escape of water and water vapor from beneath the drainage panel.