System for sealing asbestos contaminated material in building crawl space
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United States of America Patent
Stats
-
Oct 8, 1991
Grant Date -
N/A
app pub date -
Apr 6, 1990
filing date -
Apr 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An impermeable membrane seals a layer of asbestos contaminated material and contaminated earth of an earthen floor so as to prevent airborne contamination by asbestos fibers to a crawl space located underneath a building. The asbestos contaminated material is permanently encapsulated in the crawl space with the impermeable membrane which allows walking or crawling through the crawl space without the asbestos contaminated material becoming airborne due to the stretchability of the impermeable membrane. In addition, any gas entrapped by the impermeable membrane is vented to the outside by a hollow tube passing through the membrane and communicating with the outside of the building. Optionally, cementatious material may be entrapped between the earthen floor and the impermeable membrane which, upon mixture with condensate formed on the undersurface of the membrane, would harden and rigidify the asbestos contaminated material in place.
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