Fire resistant non-breathable roofing underlayment

Abstract

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 multilayered roofing underlayment comprising:
 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) wherein a product weight of said roofing underlayment is from 90 to 270 grams per square meter.   
     
     
         2 . The multilayered roofing underlayment as in  claim 1 , wherein said first layer of nonwoven material has a product weight from 10 to 50 grams per square meter. 
     
     
         3 . The multilayered roofing underlayment as in  claim 1 , wherein said third layer of aluminum foil has a thickness from 5 microns to 15 microns. 
     
     
         4 . The multilayered roofing underlayment as in  claim 1 , further comprising a top side, wherein said top side has a coefficient of friction of 0.4 to 1.4. 
     
     
         5 . The multilayered roofing underlayment as in  claim 1 , further comprising a back side, wherein said back side has a coefficient of friction of 0.4 to 0.99. 
     
     
         6 . The multilayered roofing underlayment as in  claim 1 , wherein said second layer of lamination coating is composed of one or more specialty polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin. 
     
     
         7 . The multilayered roofing underlayment as in  claim 1 , wherein said fourth layer of laminating coating is composed of one or more specialty polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin. 
     
     
         8 . The multilayered roofing underlayment as in  claim 1 , wherein said sixth layer of backside coating is composed of one or more specialty polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin. 
     
     
         9 . The multilayered roofing underlayment as in  claim 2 , wherein said third layer of aluminum foil has a thickness from 5 microns to 15 microns. 
     
     
         10 . The multilayered roofing underlayment as in  claim 9 , further comprising a top side, wherein said top side has a coefficient of friction of 0.4 to 1.4. 
     
     
         11 . The multilayered roofing underlayment as in  claim 10 , further comprising a back side, wherein said back side has a coefficient of friction of 0.4 to 0.99. 
     
     
         12 . The multilayered roofing underlayment as in  claim 11 , wherein said second layer of lamination coating is composed of one or more specialty polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin. 
     
     
         13 . The multilayered roofing underlayment as in  claim 12 , wherein said fourth layer of laminating coating is composed of one or more specialty polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin. 
     
     
         14 . The multilayered roofing underlayment as in  claim 13 , wherein said sixth layer of backside coating is composed of one or more specialty polymers selected from a group consisting of: propylene elastomer, ethyl methyl acrylate, ethyl vinyl acetate, and thermoplastic polyolefin.