System, method and apparatus for increasing average reflectance of a roofing product for sloped roof
First Claim
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1. A roofing product, comprising:
- a substrate having an exposure zone and a headlap zone;
a bitumen layer on the substrate;
first granules on the bitumen layer in the exposure zone, the first granules having a solar reflectance greater than 35;
an adhesive on only some portions on tops of the first granules, such that the first granules have an open portion that is free of the adhesive; and
an overlay of second granules that are non-white in color on the adhesive, such that the overlay of second granules and the adhesive form raised structures that are distributed substantially across the exposure zone above a plane of the first granules.
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Abstract
A roofing product includes coating a substrate with bitumen to yield a bitumen coated substrate having an exposure zone. First granules are adhered to the exposure zone to yield a first granule coating. The first granules have a solar reflectance greater than 35. An adhesive is adhered to at least a portion of the first granule coating. An open portion of the first granule coating that is free of the adhesive is maintained. An overlay of non-white second granules is adhered to the adhesive, such that the overlay of second granules and the adhesive provide a raised structure above a plane of the first granule coating.
109 Citations
24 Claims
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1. A roofing product, comprising:
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a substrate having an exposure zone and a headlap zone; a bitumen layer on the substrate; first granules on the bitumen layer in the exposure zone, the first granules having a solar reflectance greater than 35; an adhesive on only some portions on tops of the first granules, such that the first granules have an open portion that is free of the adhesive; and an overlay of second granules that are non-white in color on the adhesive, such that the overlay of second granules and the adhesive form raised structures that are distributed substantially across the exposure zone above a plane of the first granules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A roofing product, comprising:
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a sheet having an exposure portion and a non-exposure portion; a coating of an adhesive on the sheet, the adhesive coated sheet having a front surface and a rear surface; a front layer of first granules adhered to the front surface of the exposure portion of the sheet comprising a first granule coated front surface, and the first granules have a solar reflectance greater than 50; an overlay adhesive coating adhered to at least a first zone on top of the first granule coated front surface of the exposure portion; a second zone of the first granule coated front surface of the exposure portion that is free of the overlay adhesive coating; and an overlay layer of second granules adhered to the first zone of the overlay adhesive coating such that the overlay layer of the second granules and the overlay adhesive coating comprise a raised structure above a plane of the exposure portion, and the second granules have a non-white color. - View Dependent Claims (23, 24)
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Specification