Lap seam for liquid containment systems and method of forming
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United States of America Patent
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-
Jul 18, 1989
Issued Date -
N/A
app pub date -
May 5, 1988
filing date -
Feb 25, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A membrane type liquid containment system such as a membrane roof, pond liner and the like is disclosed wherein a large membrane is formed by adhering together individual membrane sheets at lap seams or field splices. The field splice includes a primary adhering seal formed by a splicing cement. The splice also includes a thick bead of a sealant applied between the overlapped edges. This seal acts to form a secondary or redundant seal in the field splice whereby any failure in the splicing cement or primary bond does not cause failure. A method of forming this seal is also described which permits application of the lap sealant after the cement has been applied while the cement is developing body or strength.
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