Asphalt Roof Shingle System

Abstract

Asphalt roofing systems including multiple sealing strips between two overlaid asphalt roof shingles are described. Additional sealing strips can enhance wind and water resistance of a roof. Simulations are carried out with three tab asphalt roofing shingles to determine desirable locations for multiple sealing strips between overlaid shingles.

What is claimed is: 
     
         1 . An asphalt roof shingle system comprising:
 an asphalt roof shingle comprising an outer edge;   a first sealant strip adhered to a surface of the asphalt roof shingle;   a second sealant strip adhered to the surface of the asphalt roof shingle, wherein the first sealant strip is farther from the outer edge as compared to the second sealant strip.   
     
     
         2 . The asphalt roof shingle system of  claim 1 , wherein the first sealant strip and the second sealant strip are on an upper surface of the asphalt roof shingle. 
     
     
         3 . The asphalt roof shingle system of  claim 1 , further comprising a release liner covering the first sealant strip and the second sealant strip. 
     
     
         4 . The asphalt roof shingle system of  claim 1 , wherein the asphalt roof shingle is a three tab asphalt roof shingle. 
     
     
         5 . The asphalt roof shingle system of  claim 1 , wherein the first sealant strip and the second sealant strip are each about 0.5 inches in length. 
     
     
         6 . The asphalt roof shingle system of  claim 1 , wherein the first sealant strip and the second sealant strip are separated from one another by a distance of about 2.2 inches or less. 
     
     
         7 . The asphalt roof shingle system of  claim 1 , wherein the first sealant strip and the second sealant strip are separated from one another by a distance of about 0.5 inches or more. 
     
     
         8 . The asphalt shingle system of  claim 1 , wherein the second sealant strip is a distance from the outer edge of the asphalt shingle, the distance being the sum of an exposure length of the shingle and about 0.6 inches. 
     
     
         9 . The asphalt shingle of  claim 8 , wherein the exposure length is about 5 inches. 
     
     
         10 . A method for attaching roof shingles to a roof, comprising:
 attaching a first asphalt roof shingle to the roof;   following, attaching a second asphalt roof shingle to the roof along an attachment line by use of a fixed support such that the second asphalt roof shingle partially overlays the first asphalt roof shingle, wherein upon attachment, a first sealant strip and a second sealant strip are located between the first and second asphalt roof shingles, with the first sealant strip being located farther from an outer edge of the second asphalt roof shingle than the second sealant strip.   
     
     
         11 . The method of  claim 10 , wherein the fixed support comprises a nail. 
     
     
         12 . The method of  claim 10 , wherein the first and second asphalt roof shingles are three tab asphalt roof shingles. 
     
     
         13 . The method of  claim 10 , wherein the ratio of the distance from the second sealant strip to an outer edge of the second asphalt shingle to the distance from the attachment line to the outer edge of the second asphalt shingle is about 0.11 or less. 
     
     
         14 . The method of  claim 13 , wherein the distance from the second sealant strip to the outer edge of the second asphalt shingle is about 0.6 inches or less. 
     
     
         15 . The method of  claim 10 , wherein the ratio of the distance from the attachment line to the first sealant strip to the distance from the attachment line to the outer edge of the second asphalt shingle is about 0.42 or less. 
     
     
         16 . The method of  claim 15 , wherein the distance from the attachment line to the first sealant strip is about 2.2 inches or less. 
     
     
         17 . The method of  claim 10 , wherein the first sealant strip is about half way between the attachment line and the second sealant strip. 
     
     
         18 . The method of  claim 10 , wherein following attachment of the second asphalt roof shingle, an exposure length of the first asphalt roof shingle extends beyond the outer edge of the second asphalt roof shingle. 
     
     
         19 . The method of  claim 18 , wherein the exposure length is about 5 inches.