Above deck roofing ventilation system

Abstract

Disclosed herein are an above deck ventilation system for a roof, and related methods of installation, having a ventilation medium sandwiched between a roof deck and a roof covering providing air channels between the roof deck and the roof covering. In one embodiment, a roofing system is provided, and may comprise a roof deck and a roof covering. In addition, the roofing system may comprise a ventilating medium disposed between the roof deck and the roof covering, where the ventilating medium may have a plurality of open air chambers disposed between a top sheet and the bottom sheet and traversing the length of the ventilation medium.

1 . A roofing system comprising:
 a) a roof deck;   b) a roof covering; and   c) a ventilating medium disposed between the roof deck and the roof covering, wherein the ventilating medium comprises one or more open air chambers between the roof deck and the roof covering.   
     
     
         2 . The roofing system of  claim 1 , wherein the ventilating medium comprises a structure sufficient to support the roof covering. 
     
     
         3 . The roofing system of  claim 1 , wherein the open air chambers may be in a plurality of layers. 
     
     
         4 . The roofing system of  claim 1 , wherein the open air chambers have a rectangular, circuloid, sinusoidal, or other geometric cross section. 
     
     
         5 . The roofing system of  claim 1 , wherein the open air chambers are formed from standoffs from one layer or between two layers. 
     
     
         6 . The roofing system of  claim 1 , wherein the open air chambers are formed from at least one layer that is folded or corrugated. 
     
     
         7 . The roofing system of  claim 1 , wherein the ventilation medium has a height from about 0.75 to about 2 inches. 
     
     
         8 . The roofing system of  claim 1 , wherein the ventilation medium has a width from about 1 feet to about 8 feet, and has a length from about 1 foot to about 24 feet. 
     
     
         9 . The roofing system of  claim 1 , wherein the roof covering comprises a shingle. 
     
     
         10 . The roofing system of  claim 1 , wherein the ventilation medium may be manufactured from the group consisting of: polyethylene, ultra-high molecular weight polyethylene (UHMWPE); high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polypropylene, low-impact polystyrene, high-impact polystyrene, acetal, polyvinyl chloride (PVC), (poly-)acrylonitrile-butadiene-styrene (ABS), polyamide, polyester, polycarbonate, (poly-)styrene-butadiene-styrene (SBS), (poly-)styrene-butadiene-rubber (SBR), styrene-olefin block polymers (SEBC), acrylic, nylon, polyether imide (PEI), polyurethane and or any other suitable thermoplastic or thermoset plastic. 
     
     
         11 . The roofing system of  claim 1 , wherein the ventilation medium has an R-value ranging from about 1 to about 5. 
     
     
         12 . A composition roofing shingle, comprising:
 a first layer comprising a headlap area, a buttlap area and a common bond area between the headlap and buttlap areas, the first layer having an interior surface and an exterior surface, wherein only the exterior surface of only the buttlap area of the first layer provides at least an initial portion of an exposure surface of the shingle while the exterior surface of the headlap and common bond areas of the first layer are configured to be overlapped by a portion of a second shingle; and   a ventilating medium attached to the first layer at a top edge of the headlap area that is opposite its common bond area, and extending across the headlap area of the shingle, wherein the ventilating medium comprises one or more open air chambers between the roof deck and the roof covering.   
     
     
         13 . A composition roofing shingle according to  claim 12 , wherein the first layer comprises a bituminous material. 
     
     
         14 . A composition roofing shingle according to  claim 13 , wherein the bituminous material comprises asphalt. 
     
     
         15 . A composition roofing shingle according to  claim 12 , wherein the ventilating medium is attached to the interior surface of the first layer of the shingle. 
     
     
         16 . A composition roofing shingle according to  claim 12 , wherein the ventilating medium attached to the headlap area of the first layer comprises a first thickness of the shingle, wherein the buttlap and common bond areas of a second shingle being coupled to the buttlap and common bond area of a first shingle comprises a second thickness of the shingle, and the second thickness is substantially equal to the first thickness. 
     
     
         17 . A composition roofing shingle according to  claim 12 , wherein the open air chambers have a rectangular cross section. 
     
     
         18 . A composition roofing shingle according to  claim 12 , wherein the open air chambers are formed from at least one layer that is folded or corrugated. 
     
     
         19 . A composition roofing shingle according to  claim 12 , wherein the ventilation medium may be manufactured from the group consisting of: polyethylene, ultra-high molecular weight polyethylene (UHMWPE); high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polypropylene, low-impact polystyrene, high-impact polystyrene, acetal, polyvinyl chloride (PVC), (poly-)acrylonitrile-butadiene-styrene (ABS), polyamide, polyester, polycarbonate, (poly-)styrene-butadiene-styrene (SBS), (poly-)styrene-butadiene-rubber (SBR), styrene-olefin block polymers (SEBC), acrylic, nylon, polyether imide (PEI), polyurethane and or any other suitable thermoplastic or thermoset plastic. 
     
     
         20 . A composition roofing shingle according to  claim 12 , wherein the ventilation medium has an R-value ranging from about 1 to about 5. 
     
     
         21 . A method of installing a ventilated roof, the method comprising:
 a) preparing a roof deck of a structure;   b) placing a ventilating medium on the roof deck, wherein the ventilating medium comprises one or more open air chambers; and   c) affixing roof coverings to a top surface of the ventilating medium.   
     
     
         22 . The method of  claim 21 , further comprising placing a roofing membrane directly on the roof deck, wherein the ventilating medium is placed on top of the roofing membrane. 
     
     
         23 . The method of  claim 21 , further comprising placing a roofing membrane directly on the ventilating medium, wherein the roof coverings are placed on top of the roofing membrane. 
     
     
         24 . The method of  claim 21 , wherein the open air chambers may be in a plurality of layers. 
     
     
         25 . The method of  claim 21 , wherein the open air chambers have a rectangular, circuloid, sinusoidal, or other geometric cross section. 
     
     
         26 . The method of  claim 21 , wherein the roof coverings comprise shingles. 
     
     
         27 . The method of  claim 21 , wherein the ventilation medium may be manufactured from the group consisting of: polyethylene, ultra-high molecular weight polyethylene (UHMWPE); high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polypropylene, low-impact polystyrene, high-impact polystyrene, acetal, polyvinyl chloride (PVC), (poly-)acrylonitrile-butadiene-styrene (ABS), polyamide, polyester, polycarbonate, (poly-)styrene-butadiene-styrene (SBS), (poly-)styrene-butadiene-rubber (SBR), styrene-olefin block polymers (SEBC), acrylic, nylon, polyether imide (PEI), polyurethane and or any other suitable thermoplastic or thermoset plastic.