Ventilation system for roofs
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 3, 1990
Issued Date -
N/A
app pub date -
Jul 27, 1989
filing date -
Mar 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a ventilation system which makes the drying of roof insulation easier when there is a break in the vapor barrier or in the impermeable membrane protecting the said insulation. The system comprises an impermeable sheet composed of a series of openings distributed on its surface and a plurality of supports arranged between the openings.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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