Monolithic vent pipe flashing and method of manufacture thereof

Abstract

A monolithic vent pipe flashing for use with a vent pipe projecting from a surface, such as a roof. The flashing includes a primary barrier with an upper surface and a lower surface, with the lower surface abutting the surface from which the vent pipe projects. A vent pipe cover is attached to and extends from the primary barrier. The vent pipe cover includes a vent pipe cover bore for receiving the vent pipe. The vent pipe cover body includes a first end and a second end, and the first end is attached to and overlaps a portion of the lower surface of the primary barrier. A secondary seal barrier is at least partially attached to the portion of the first end overlapping the lower surface of the primary barrier. A method of manufacturing a vent pipe flashing is also disclosed.

1 . A vent pipe flashing for use in connection with a vent pipe projecting from a surface, the flashing comprising: 
 a primary barrier having an upper surface and a lower surface, with the lower surface of the primary barrier configured to abut the surface from which the vent pipe projects;    a vent pipe cover attached to and extending from the primary barrier, the vent pipe cover including a vent pipe cover bore for receiving the vent pipe and defined by a Vent pipe cover body having a first end and a second end, at least a portion of the first end attached to and overlapping a portion of the lower surface of the primary barrier; and    a secondary seal barrier at least partially attached to the portion of the first end overlapping the lower surface of the primary barrier.    
   
   
       2 . The vent pipe flashing of  claim 1 , wherein a portion of the primary barrier, the first end of the vent pipe cover body and a portion of the secondary seal barrier are bonded together.  
   
   
       3 . The vent pipe flashing of  claim 2 , wherein the the portion of the primary barrier, the first end of the vent pipe cover body and a portion of the secondary seal barrier are bonded by at least one of heat fusing process and an applied adhesive material.  
   
   
       4 . The vent pipe flashing of  claim 1 , wherein at least one of the primary barrier, the vent pipe cover and the secondary seal barrier comprise a bitumen material, a rubber, a polymer and a synthetic material.  
   
   
       5 . The vent pipe flashing of  claim 1 , wherein the vent pipe cover is formed in one of a tubular shape and a frustoconical shape.  
   
   
       6 . The vent pipe flashing of  claim 1 , further comprising an attachment mechanism configured to connect at least a portion of the vent pipe flashing to the vent pipe.  
   
   
       7 . The vent pipe flashing of  claim 6 , wherein the attachment mechanism is at least one of a clamp, a ratchet mechanism and a securement device.  
   
   
       8 . The vent pipe flashing of  claim 1 , wherein at least a portion of the lower surface of the primary barrier is attached to the surface from which the vent pipe projects.  
   
   
       9 . The vent pipe flashing of  claim 8 , wherein the lower surface of the primary barrier is attached to the surface from which the vent pipe projects via an applied adhesive material.  
   
   
       10 . A method of manufacturing a vent pipe flashing, comprising the steps of: 
 (a) providing a first substantially planar section of material;    (b) providing a second substantially planar section of material having a substantially centrally positioned opening and having an upper surface and a lower surface;    (c) providing a third substantially planar section of material having a substantially centrally positioned opening and having an upper surface and a lower surface;    (d) rolling the first section of material into at least one of a substantially tubular or substantially frustoconical shape, thereby creating a vent pipe cover portion having a first end and a second end and a vent pipe cover bore;    (e) inserting the first end of the vent pipe cover portion through the opening of the second section of material;    (f) positioning the first end of the vent pipe cover, such that at least a portion of the first end of the vent pipe cover portion is abutting and overlapping the lower surface of the second section of material;    (g) bonding the overlapping portion of the vent pipe cover portion to the lower surface of the second section of material;    (h) aligning the opening of the third section of material with the vent pipe cover bore; and    (i) bonding the upper surface of the third section of material to at least a portion of the overlapping portion of the vent pipe cover portion and the lower surface of the second section of material.    
   
   
       11 . The method of  claim 10 , wherein, prior to the bonding step (g), the overlapping portion of the vent pipe cover is “fingered” to provide an abutting surface between the overlapping portion of the vent pipe cover and the lower surface of the second section of material.  
   
   
       12 . The method of  claim 10 , wherein the bonding step (g) is achieved by at least one of a heat fusing process and an applied adhesive material.  
   
   
       13 . The method of  claim 10 , wherein the bonding step (i) is achieved by at least one of a heat fusing process and an applied adhesive material.  
   
   
       14 . The method of  claim 10 , wherein, after the bonding step (g), the method further comprises the step of heating and melting the overlapping portion of the vent pipe cover portion on the lower surface of the second section of material to provide a substantially uniform and enhanced seal area.  
   
   
       15 . The method of  claim 10 , wherein, after the bonding step (i), the method further comprises the step of heating and melting the upper surface of the third section of material on at least-a portion of the overlapping portion of the vent pipe cover portion and the lower surface of the second section of material to provide a substantially uniform and enhanced seal area.  
   
   
       16 . The method of  claim 10 , wherein at least one of the first section of material, the second section of material and the third section of material comprise a bitumen material, a rubber, a polymer and a synthetic material.  
   
   
       17 . A kit for manufacturing a vent pipe flashing, comprising: 
 a first substantially planar section of material;    a second substantially planar section of material having a substantially centrally positioned opening; and    a third substantially planar section of material having a substantially centrally positioned opening.    
   
   
       18 . The kit of  claim 17 , wherein at least one of the first section of material, the second section of material and the third section of material comprise a bitumen material, a rubber, a polymer and a synthetic material.