Vapor permeable shingles and underlayment sheeting for a roof covering
OwnerLaurence E. Curraninventor
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Abstract
A vapor permeable roof covering comprised of an asphaltic-type shingle and a coated underlayment sheeting, the shingle and sheeting having an array of pierced openings therethrough spaced along the length and width thereof constructed and arranged to permit only the passage therethrough of water vapor under vapor pressure and concurrently prevent passage of liquid water therethrough.
Claims9
A vapor permeable roof covering comprising, in combination, an array of asphaltic-type roof shingles and coated underlayment sheeting, said shingles and sheeting each having a pattern of pierced openings therethrough spaced along the length and width thereof, each of said openings functioning as a one-way valve which permits passage of water vapor therethrough under vapor pressure and concurrently prevents passage therethrough of liquid water.
A vapor permeable asphaltic-type shingle for a roof covering, said shingle having a series of pierced perforations therethrough spaced along the length and width thereof, said perforations functioning as one-way valves for permitting only passage therethrough of water vapor under pressure and preventing passage of liquid water.
Dependencies are inferred from the claim text.