Insulation system and method

Abstract

An insulation system for a cavity of a building structure, including: a layer of plastic foam insulation present on a substrate of the cavity, and a layer of blown-in fiberglass insulation in substantial contact with the layer of plastic foam insulation, wherein the layer of plastic foam insulation is present between the substrate and the layer of blown-in fiberglass insulation.

1 . An insulation system for a cavity of a building structure, comprising:
 a layer of plastic foam insulation present on a substrate of the cavity, and   a layer of blown-in fiberglass insulation in substantial contact with the layer of plastic foam insulation,   wherein the layer of plastic foam insulation is present between the substrate and the layer of blown-in fiberglass insulation.   
   
   
       2 . The insulation system of  claim 1 , wherein the plastic foam is a polyurethane spray foam. 
   
   
       3 . The insulation system of  claim 1 , wherein the thickness of the layer of plastic foam insulation is from about 0.5 inch to about 10 inches. 
   
   
       4 . The insulation system of  claim 1 , wherein the thickness of the layer of blown-in fiberglass insulation is from about 1.5 inch to about 15 inches. 
   
   
       5 . The insulation system of  claim 1 , wherein the density of the layer of blown-in fiberglass insulation is from about 1.5 pcf to about 2.5 pcf. 
   
   
       6 . The insulation system of  claim 1 , wherein the layer of blow-in fiberglass insulation is left exposed and constitutes the outermost layer of the system. 
   
   
       7 . The insulation system of  claim 1 , wherein the layer of plastic foam insulation further comprises a primer coating on its outer surface for enhancing adhesion to the layer of blown-in fiberglass insulation. 
   
   
       8 . The insulation system of  claim 1 , wherein the system is present in an attic of a building structure. 
   
   
       9 . The insulation system of  claim 1 , wherein the layer of blown-in fiberglass insulation is adhered to the layer of plastic foam insulation by a chemical adhesive. 
   
   
       10 . A method of insulating a cavity of a building structure, comprising:
 forming a layer of plastic foam insulation on a substrate of the cavity, and   forming a layer of blown-in fiberglass insulation such that the layer of blown-in fiberglass insulation is in substantial contact with the layer of plastic foam insulation,   wherein the layer of blown-in fiberglass insulation is arranged at an interior side with respect to the layer of plastic foam insulation.   
   
   
       11 . The method of  claim 10 , wherein the plastic foam is a polyurethane spray foam. 
   
   
       12 . The method of  claim 10 , wherein the thickness of the layer of plastic foam insulation is from about 0.5 inch to about 10 inches. 
   
   
       13 . The method of  claim 10 , wherein the thickness of the layer of blown-in fiberglass insulation is from about 1.5 inch to about 15 inches. 
   
   
       14 . The method of  claim 10 , wherein the density of the layer of blown-in fiberglass insulation is from about 1.5 pcf to about 2.5 pcf. 
   
   
       15 . The method of  claim 10 , wherein the layer of blow-in fiberglass insulation is left exposed and constitutes the outermost layer of the system. 
   
   
       16 . The method of  claim 10 , wherein the layer of plastic foam insulation further comprises a primer coating on its outer surface for enhancing adhesion to the layer of blown-in fiberglass insulation. 
   
   
       17 . The method of  claim 10 , wherein the system is present in an attic of a building structure. 
   
   
       18 . The method of  claim 10 , wherein the layer of blown-in fiberglass insulation is adhered to the layer of plastic foam insulation by a chemical adhesive.