Patent ID: 6676506
Filing Date: 2004-01-13
Classification: E02D,E04B

Abstract:
Method of protecting floors above the crawl space and buildings on foundations of the crawl-space type from damp and microbial growth, where the crawl space (2) is delimited by the floor (4) above the crawl space of the building, bearing foundation walls (1) with vents (9) for outdoor air and the foundation ground (3), characterized in that the crawl space (2) is divided into at least one upper (10) and at least one lower (11) climate zone, in that the two climate zones are separated from one another by means of an essentially windtight and vapourtight climate screen (12) which forms a tight partition between the climate zones, in that the climate screen (12) is arranged at such a height in the crawl space (2) that the outdoor air vents (9) in the foundation walls (1) communicate with only the lower climate zone (11), in that the upper climate zone (10) is provided with at least one supply air opening (18) and at least one exhaust air opening (21; 22), in that the supply air opening (18) is connected to a room above in the building and the exhaust air opening (21; 22) is connected to a discharge duct (23; 24), and in that a fan (25) is arranged in association with the discharge duct so as to maintain a lower pressure in the upper climate zone (10) than the pressure in said room above, so that the upper climate zone (10) is ventilated by indoor air from the building and the lower climate zone (11) is ventilated by outdoor air.