Roof tile attachment method

Abstract

Methods of attaching roof tiles are disclosed. The methods may be used to attach a new roof or to upgrade an existing roof. The methods include the use of mechanical fasteners and polymer adhesives, including foamable adhesives.

1 - 6 . (canceled) 
     
     
         7 . A method for in situ installation of a plurality of rows of individual roof tiles to a roof substrate on a pitched roof, the method comprising the steps of:
 attaching a first row of individual roof tiles to the roof substrate;   applying a polymer adhesive on an upper surface of a head portion of a first row roof tile, wherein the polymer adhesive comprises a foamable liquid polyurethane, wherein the foamable liquid polyurethane is a froth foam;   placing a second row roof tile in overlapping contact with the first row roof tile such that the overlapping portion of the second row roof tile contacts the applied polymer adhesive on the first row roof tile during the reactivity period of the polymer adhesive; and   attaching a head portion of the second row roof tile to the roof substrate with a mechanical fastener.   
     
     
         8 . The method of  claim 7 , wherein the froth foam comprises a blowing agent selected from the group consisting of hydrogenated chlorofluorocarbon R22, hydrogenated fluorocarbon 134A, and chlorofluorocarbon R12. 
     
     
         9 . The method of  claim 7 , wherein the adhesive has a density of 0.016 to 0.13 grams per cubic centimeter. 
     
     
         10 . A method of upgrading a tile roof comprising a first rows of tiles, and a second row of roof tiles, wherein each tile comprises a nose portion and a head portion, wherein the head portion of a first tile in the second row of tiles is attached to roof with a mechanical fastener, and the nose portion of the first tile overlaps the head portion of a second tile in the first row of tiles, the method comprising the steps of:
 lifting a nose portion the first tile;   applying a polymer adhesive in an overlapping region between the first tile and the second tile, wherein the polymer adhesive comprises a foamable liquid polyurethane, wherein the foamable liquid polyurethane is a froth foam;   lowering the nose portion of the first tile back onto the head portion of the second tile; and   adhering the first tile to the second tile with the polymer adhesive.   
     
     
         11 . The method of  claim 10 , wherein the froth foam comprises a blowing agent selected from the group consisting of hydrogenated chlorofluorocarbon R22, hydrogenated fluorocarbon 134A, and chlorofluorocarbon R12. 
     
     
         12 . The method of  claim 10 , wherein the adhesive has a density of 0.016 to 0.13 grams per cubic centimeter.