Composite building element and methods of making and using the same
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United States of America Patent
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-
Apr 2, 1996
Grant Date -
N/A
app pub date -
Aug 17, 1993
filing date -
Aug 21, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A composite roofing element comprises a first layer of aggregate based material, a second layer of material having a density less than that of the first layer and has a wedge shaped region depending from its underside. The wedge shaped region is preferably integral with the second layer which can be made of an expanded polymer, expanded polystyrene being particularly suitable. Overlapping structure on the side edges and a recess in the thick end of the wedge enable adjacent elements to interlock with each other. By using such lightweight roofing elements the requirement for a substantial load bearing supporting structure is reduced.
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International Classification(s)
Cited Art Landscape
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