System, method and apparatus for increasing average reflectance of a roofing product for sloped roof
First Claim
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1. A method of making a roofing product, comprising:
- (a) providing a substrate;
(b) coating the substrate with bitumen to yield a bitumen coated substrate having an exposure zone;
(c) adhering first granules to the exposure zone to yield a first granule coating, the first granules having a solar reflectance greater than 35;
(d) adhering an adhesive to at least a portion of the first granule coating;
(e) maintaining an open portion of the first granule coating that is free of the adhesive; and
(f) adhering an overlay of second granules that are non-white in color to the adhesive, such that the overlay of second granules and the adhesive provide a raised structure that is distributed substantially across the exposure zone above a plane of the first granule coating.
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Abstract
A roofing product and method 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.
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Citations
17 Claims
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1. A method of making a roofing product, comprising:
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(a) providing a substrate; (b) coating the substrate with bitumen to yield a bitumen coated substrate having an exposure zone; (c) adhering first granules to the exposure zone to yield a first granule coating, the first granules having a solar reflectance greater than 35; (d) adhering an adhesive to at least a portion of the first granule coating; (e) maintaining an open portion of the first granule coating that is free of the adhesive; and (f) adhering an overlay of second granules that are non-white in color to the adhesive, such that the overlay of second granules and the adhesive provide a raised structure that is distributed substantially across the exposure zone above a plane of the first granule coating. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of making a roofing product, comprising;
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(a) providing a web; (b) coating the web with bitumen to yield a bitumen coated web having an exposure zone and a headlap zone; (c) adhering first granules to the exposure zone, the first granules having a solar reflectance greater than about 50; (d) adhering second granules to the headlap zone; (e) applying an adhesive to at least a portion of the first granules in the exposure zone; (f) maintaining an open portion of the first granules that is free of the adhesive; and (g) adhering an overlay of third granules to the adhesive such that the overlay of third granules and the adhesive provide at least one raised structure above a plane of the first granules in the exposure zone, and the third granules have a non-white color. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of making a layer of roofing product, the method comprising the steps of:
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(a) providing a sheet; (b) coating the sheet with an adhesive to yield an adhesive coated sheet having a front surface and a rear surface; (c) denoting an exposure portion and a non-exposure portion of the sheet; (d) adhering a front layer of first granules to the front surface of the exposure portion of the sheet to yield a first granule coated front surface; (e) adhering an overlay adhesive coating to at least a first zone of the first granule coated front surface of the exposure portion; (f) maintaining at least a second zone of the first granule coated front surface of the exposure portion free of the overlay adhesive coating; and
,(g) adhering an overlay layer of second granules to the first zone of the overlay adhesive coating such that the overlay layer of the second granules and the overlay adhesive coating provide a raised structure above a plane of the exposure portion;
wherein(h) the first granules have a solar reflectance greater than 50; and
the second granules have a non-white color.
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Specification