Reusable insulated roof system and method

Abstract

A roof system includes a waterproofing layer and a cellular glass insulation layer. A protective coating is applied to an uppermost surface (i.e., a surface furthest from the roofing deck) of the cellular glass insulation layer. The waterproofing layer is loosely laid on the uppermost surface of the cellular glass insulation layer, such that the protective coating is positioned between the cellular glass insulation layer and the waterproofing layer. This arrangement facilitates subsequent separation (e.g., manually) of the waterproofing layer from the cellular glass insulation layer. A roof assembly is also provided which comprises a roof system and a roof deck. Also provided is a method of installing and uninstalling a roof assembly.

1 . A roof system for a roof assembly, the roof system comprising:
 a cellular glass insulation layer; and   a waterproofing layer,   wherein the waterproofing layer is loosely laid above the cellular glass insulation layer;   wherein the cellular glass insulation layer comprises one or more layers of cellular glass insulation material; and   wherein the uppermost layer of cellular glass insulation material has a protective coating on its uppermost surface, such that the protective coating forms an upper face of the cellular glass insulation layer and is positioned between the cellular glass insulation layer and the waterproofing layer.   
     
     
         2 . The roof system of  claim 1 , wherein the waterproofing layer comprises at least two layers of waterproofing material, and
 wherein one of said layers is loosely laid above the cellular glass insulation layer.   
     
     
         3 . The roof system of  claim 1 , wherein the protective coating is selected from mineral protective coatings, silica-based protective coatings, and alkali metal silicate-based protective coatings. 
     
     
         4 . The roof system of  claim 1 , wherein the protective coating is selected from calcium hydroxide-based coatings, calcium sulphate-based coatings, modified silica-based coatings, lime-based coatings and renders, and alkali metal silicate-based coatings. 
     
     
         5 . The roof system of  claim 1 , wherein the cellular glass insulation layer is formed of a plurality of cellular glass insulation slabs. 
     
     
         6 . The roof system of  claim 1 , which further comprises roof ballast positioned directly or indirectly abutting the upper surface of the waterproofing layer. 
     
     
         7 . A roof assembly comprising a roof system and a roof deck, wherein the roof system is loosely laid on top of the roof deck, and wherein the roof system comprises:
 a cellular glass insulation layer; and   a waterproofing layer,   wherein the waterproofing layer is loosely laid above the cellular glass insulation layer;   wherein the cellular glass insulation layer comprises one or more layers of cellular glass insulation material; and   wherein the uppermost layer of cellular glass insulation material has a protective coating on its uppermost surface, such that the protective coating forms an upper face of the cellular glass insulation layer and is positioned between the cellular glass insulation layer and the waterproofing layer.   
     
     
         8 . A roof assembly comprising:
 a roof system comprising:
 a cellular glass insulation layer; and 
 a waterproofing layer, 
 wherein the waterproofing layer is loosely laid above the cellular glass insulation layer; 
 wherein the cellular glass insulation layer comprises one or more layers of cellular glass insulation material; and 
 wherein the uppermost layer of cellular glass insulation material has a protective coating on its uppermost surface, such that the protective coating forms an upper face of the cellular glass insulation layer and is positioned between the cellular glass insulation layer and the waterproofing layer; 
   a roof deck; and   a vapor barrier,   wherein the vapor barrier is positioned between the lowermost layer of cellular glass insulation material and the roof deck, and   wherein the cellular glass insulation layer is loosely laid onto the vapor barrier.   
     
     
         9 . The roof assembly of  claim 8 , wherein the vapor barrier is loosely laid onto the roof deck. 
     
     
         10 . A method of installing a roof assembly, the method comprising:
 (i) installing a cellular glass insulation layer to a roof deck, wherein the cellular glass insulation layer comprises one or more layers of cellular glass insulation material;   (ii) coating the uppermost surface of the uppermost layer of cellular glass insulation material with a protective coating;   (iii) loosely laying a waterproofing layer onto the protective coating, wherein the waterproofing layer comprises one or more layers of waterproofing material; and   (iv) positioning roof ballast directly or indirectly abutting the upper surface of the waterproofing layer.   
     
     
         11 . The method of  claim 10 , wherein the cellular glass insulation layer is formed of cellular glass insulation slabs. 
     
     
         12 . The method of  claim 10 , which further comprises positioning a vapor barrier between the roof deck and the cellular glass insulation layer such that the vapor barrier is loosely laid onto or adheres to the roof deck and the cellular glass insulation layer is loosely laid on the vapor barrier. 
     
     
         13 . The method of any of  claim 10 , wherein the protective coating is selected from mineral protective coatings, silica-based protective coatings, and alkali metal silicate-based protective coatings. 
     
     
         14 . The method of any of  claim 10 , wherein the protective coating is selected from calcium hydroxide-based coatings, calcium sulphate-based coatings, modified silica-based coatings, lime-based coatings and renders, and alkali metal silicate-based coatings. 
     
     
         15 . A method of uninstalling a roof assembly comprising a roof system and a roof deck, wherein the roof system is loosely laid on top of the roof deck, and wherein the roof system comprises: a cellular glass insulation layer;
 and a waterproofing layer, wherein the waterproofing layer is loosely laid above the cellular glass insulation layer; wherein the cellular glass insulation layer comprises one or more layers of cellular glass insulation material; and wherein the uppermost layer of cellular glass insulation material has a protective coating on its uppermost surface, such that the protective coating forms an upper face of the cellular glass insulation layer and is positioned between the cellular glass insulation layer and the waterproofing layer, the method comprising:   (i) if present, removing a roof ballast;   (ii) removing the waterproofing layer;   (iii) removing the cellular glass insulation material coated with the protective coating; and   (iv) if present, recovering the cellular glass insulation material not coated with the protective coating.   
     
     
         16 . The method of  claim 15 , which further comprises removing the vapor barrier if present and if loosely laid onto the roof deck. 
     
     
         17 . (canceled)