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ACRYLIC ROOFING:  PIPES AND DRAINS

Acrylic bonds well to most plastic or metal pipes. However, never flash directly to metal chimney or flue pipes: always fasten the appropriate ventilated metal flashing to the roof and and apply acrylic and fabric to the flashing. Follow these procedures just before beginning to waterproof the main roof surface.

 

caulk around pipe

STEP 1:  Caulk any voids in the
corner and tool a cove in the caulk.

 

 

cut fabric

STEP 2:  Using scissors, cut radial slits in
the center of a square piece of fabric.

 

 

coat roof

STEP 3:  Apply acrylic to the roof
surface and several inches up the pipe.

 

 

apply base fabric

STEP 4:  Lower the fabric over the
pipeand embed it into the wet acrylic.

 

 

topcoat roof fabric

STEP 5:  Topcoat the fabric
with a heavy coat of acrylic.

 

 

coat pipe

STEP 6:  Apply acrylic to
the remainder of the pipe.

 

 

 

wrap pipe with fabric

STEP 7:  Wrap fabric around the pipe,
overlapping the slits in the base fabric.

 

 

topcoat pipe

STEP 8:  Top-coat the fabric wrapping
the pipe with a heavy coat of acrylic.

 

Acrylic can be bonded directly into roof drains, but it is better to bond to a wide drain flange. Follow these procedures just before beginning to waterproof the main roof surface.

 

place fabric

STEP 1:  For bottom drains, cut slits in a
square of fabric and embed it into acrylic.

 

 

form fabric in drain

STEP 2:  Press the fabric slits against
theacrylic-coated interior of the pipe.

 

 

paint drain

STEP 3:  Top-coat the fabric, extending
well into the interior of the pipe.

 

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