FIRE RESISTANT NON-BREATHABLE ROOFING UNDERLAYMENT
A multilayered roofing underlayment including: a) a first layer of nonwoven material; b) a second layer of lamination coating adjacent to said first layer; c) a third layer of aluminum foil adjacent to said second layer; d) a fourth layer of lamination coating adjacent to said third layer; e) a fifth layer of nonwoven material adjacent to said fourth layer; f) a sixth layer of backside coating adjacent to said fifth layer; and g) where a product weight of said roofing underlayment is from 90 to 270 grams per square meter.
1 . A method, comprising:
obtaining an underlayment,
wherein the underlayment comprises:
a first layer of nonwoven material;
a second layer of lamination coating adjacent to the first layer;
a third layer of a substrate layer adjacent to the second layer;
a fourth layer of polymeric lamination coating adjacent to the third layer,
wherein the second layer and the fourth layer directly contact the third layer; and
a fifth layer of nonwoven material adjacent to the fourth layer,
wherein the underlayment is non-breathable,
installing the underlayment on a roof structure; and
installing a plurality of roofing shingles on the underlayment, thereby to form a roofing system,
wherein the underlayment is between the roof structure and the plurality of roofing shingles, and
wherein the roofing system, when tested in accordance with a classification for Class A roof coverings of ASTM E108, passes the test.
2 . The method of claim 1 , wherein the first layer of nonwoven material has a product weight from 10 to 50 grams per square meter.
3 . The method of claim 1 , wherein the third layer of aluminum foil has a thickness of 5 microns to 15 microns.
4 . The method of claim 1 , wherein the underlayment comprises a top side,
wherein the top side has a coefficient of friction of 0.4 to 1.4.
5 . The method of claim 1 , wherein the underlayment comprises a back side,
wherein the back side has a coefficient of friction of 0.4 to 0.99.
6 . The method of claim 1 , wherein the second layer is composed of one or more polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin.
7 . The method of claim 1 , wherein the fourth layer of laminating coating is composed of one or more polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin.
8 . The method of claim 1 , wherein the underlayment comprises a sixth layer of backside coating,
wherein the sixth layer is composed of one or more polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin.
9 . The method of claim 2 , wherein the third layer comprises aluminum foil having a thickness of 5 microns to 15 microns.
10 . The method of claim 9 , wherein the underlayment comprises a top side,
wherein the top side has a coefficient of friction of 0.4 to 1.4.
11 . The method of claim 10 , wherein the underlayment comprises a back side,
wherein the back side has a coefficient of friction of 0.4 to 0.99.
12 . The method of claim 11 , wherein the second layer is composed of one or more polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin.
13 . The method of claim 12 , wherein the fourth layer is composed of one or more polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin.
14 . The method of claim 13 , wherein the underlayment comprises a sixth layer of backside coating,
wherein the sixth layer is composed of one or more polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin.