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EPDM ROOFING:  TAPED INSIDE CORNERS

Inside corners that cannot be flashed with molded inside corners or by folding, such as the intersection of a sloped roof valley with a flat roof, can be sealed with multiple layers of Uncured Laminate Tape. This is a 6” wide self-adhesive lamination of uncured EPDM rubber and Butyl seam tape that has no “memory” so it can be permanently stretched into a three-dimensional corner. If the corner disc shown is stretched significantly, apply a second layer to compensate for thinning.

 

clean surfaces


STEP 1:  Clean all surfaces with
toluene, naptha, or white gasoline.

 

 

place disc


STEP 2:  Cut a 4” round disc of Uncured
Laminate Tape and remove the release paper.

 

 

press disc in corner


STEP 3:  Firmly press the center
of the tape disc into the corner.

 

 

form disc


STEP 4:  Form the tape disc against
all surfaces and their intersections.

 

 

clean disc


STEP 5:  Clean the
surface of the tape disc

 

 

place tape on wall


STEP 6:  Press a folded piece of Laminate
Tape onto one surface, tacky surface out.

 

 

unfold wall tape


STEP 7:  Unfold the tape slowly,
avoiding bridging at the corner.

 

 

press wall tape


STEP 8:  Fully unfold the tape and
press it into the second surface.

 

 

place upper wall tape


STEP 9:  Clean the tape surface and
apply a second overlapping tape.

 

 

roll all tapes


STEP 10:  Firmly roll all
surfaces of all tapes.

 

 

caulk all edges
STEP 11:  Caulk all edges with
Silicone Caulk for EPDM.

 

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