Flashing adaptable to different shapes of roof

Abstract

Disclosed is a flashing for weatherproofing an aperture made in a roof to allow passage of a chimney through the roof. The flashing has a malleable base member adapted to be mounted over the aperture made in the roof and on a surface of the roof surrounding the aperture and to match the shape of roof surface. The base member comprises a panel having edges adapted to be positioned on the roof and an opening large enough to allow passage of the chimney therethrough. The flashing also comprises a surrounding member being tubular in shape and extending upwardly from the base member to fit around the chimney. The bottom and surrounding structures are linked through a joining ring structure encircling a bottom opening of the surrounding member.

1 . A flashing for weatherproofing an aperture made in a roof to allow passage of a chimney through said roof, said flashing comprising: 
 a) a malleable base member adapted to be mounted over the aperture made in the roof and on a surface of the roof surrounding the aperture, said base member adapted to match the shape of the roof surface and comprising: 
 a panel having a top edge adapted to be positioned on an upper part of the roof, a bottom edge adapted to be positioned on a lower part of the roof, two opposite side edges and an opening, said opening being sized to allow passage of said chimney therethrough;  
   b) a rigid surrounding member extending upwardly from said base member to fit around said chimney, said surrounding member being tubular in shape and comprising: 
 a top opening sized to fit around said chimney; and  
 a bottom opening coaxially positioned on top the opening of the panel of the base member, said bottom opening being sized to allow passage therethrough of said chimney; and  
   c) a joining ring structure,    wherein the surrounding member, the base member and the joining ring structure are joined together through fastening means that traverse the base member sandwiched between the joining ring structure and the surrounding member.    
   
   
       2 . The flashing according to  claim 1 , wherein the fastening means is a series of spot welds.  
   
   
       3 . The flashing according to  claim 1 , wherein the fastening means is a series of rivets.  
   
   
       4 . The flashing according to  claim 1 , wherein the malleable base member material is selected from a group consisting of lead and stainless steel.  
   
   
       5 . The flashing according to  claim 1 , wherein the surrounding member is funnel-shaped and its top opening is smaller in size than its bottom opening.  
   
   
       6 . The flashing according to  claim 1 , wherein the surrounding member has a central axis, and said central axis is inclined toward the top edge of the panel of the base member.  
   
   
       7 . The flashing according to  claim 1 , wherein the top opening of the surrounding member is substantially circular in shape and the bottom opening of the surrounding member is substantially elliptical in shape.  
   
   
       8 . The flashing according to  claim 1 , further comprising a sealant applied at an interface between the joining ring structure, the base member and the surrounding member.  
   
   
       9 . The flashing according to  claim 1 , wherein the joining ring structure comprises two half-rings.  
   
   
       10 . The flashing according to  claim 1 , further comprising a sealant applied at a junction of the roof and the base member of the flashing.  
   
   
       11 . The flashing according to  claim 1 , further comprising a storm collar around the top opening of the surrounding member and the chimney.  
   
   
       12 . The flashing according to  claim 1 , wherein the roof is made of tiles.  
   
   
       13 . The flashing according to  claim 4 , wherein the surrounding member is funnel-shaped and its top opening is smaller in size than its bottom opening.  
   
   
       14 . The flashing according to  claim 13 , wherein the surrounding member has a central axis, and said central axis is inclined toward the top edge of the panel of the base member.  
   
   
       15 . The flashing according to  claim 14 , wherein the top opening of the surrounding member is substantially circular in shape and the bottom opening of the surrounding member is substantially elliptical in shape.  
   
   
       16 . The flashing according to  claim 15 , further comprising a sealant applied at an interface between the joining ring structure, the base member and the surrounding member.  
   
   
       17 . The flashing according to  claim 16 , wherein the joining ring structure comprises two half-rings.  
   
   
       18 . The flashing according to  claim 17 , further comprising a sealant applied at a junction of the roof and the base member of the flashing.  
   
   
       19 . The flashing according to  claim 18 , further comprising a storm collar around the top opening of the surrounding member and the chimney.  
   
   
       20 . The flashing according to  claim 19 , wherein the roof is made of tiles.