Patent ID: 6357185
Filing Date: 2002-03-19
Classification: E04D,F24F

Abstract:
A rafter air infiltration block comprising:a generally rectangular sheet of water-resistant material defining an upper and lower edge and left and right sides, a first longitudinal fold line extending the full length of the block between the left and right sides, a transverse fold line adjacent the left and right sides spaced therefrom and intersecting said first longitudinal fold line, said first longitudinal fold line being cut through said material to form a slit between said right side to said right side transverse fold line, and being cut through said material to form a slit between said left side to said left side transverse fold line, said upper edge including a pair of spaced indentations toward said first longitudinal fold line which conform in shape to a double channel vent chute, said lower edge including score lines to allow ready removal of a portion of the sheet along the lower edge in order to form a single indentation which conforms to the shape of a single channel vent chute.