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EPDM ROOFING:  INSIDE EDGES AND SILLS

TAPED INSIDE EDGES: An inside edge is created when two roof edges intersect at an angle less than 180°. In order to fold the rubber over both edges, the roof membrane must be cut at a 45° angle to both edges. A square of Uncured Laminate Tape placed on the roof surface, overhanging the roof edge, can be stretched and formed to make contact with all surfaces, sealing the corner slit. Bonding Adhesive, Termination Tape, and Termination Bars assure a watertight edge.

 

slit at corner

STEP 1:  Cut the overhanging
rubber at a 45° angle to both edges.

 

 

fold over edge

STEP 2:  Fold and adhere the rubber
over both edges, pressing into the tape.

 

 

place tape

STEP 3:  Place a square of Uncured Laminate
Tape so that it extends 2” over the roof edge.

 

 

form into place

STEP 4:  Begin to stretch the
tape downward over the edge.

 

 

finish forming

STEP 5:  Finish forming the tape until
it stretches and bonds to all surfaces.

 

 

TAPED DOOR SILLS: If door sills can be flashed before the door frames are installed, the rubber roof membrane can create a drip pan under the door that will eliminate the possibility of water leakage. Frame the opening at least 6” higher than the roof surface with the sill plate sloping slightly towards the exterior. Adhere the rubber up the wall (covering the door opening), slit the rubber, form the rubber over the door sill, and seal both sides of the opening using Uncured Laminate Tape.

 

adhere rubber

STEP 1:  Adhere the rubber sheet to
the wall continuing above the sill plate.

 

 

slit rubber

STEP 2:  Cut a vertical slit on
both sides of the door opening.

 

 

fold down

STEP 3:  Fold the rubber over the
door sill and adhere it in place.

 

 

place tape

STEP 4:  Position a strip of Uncured Laminate
Tape so that it extends 2” over the roof edge.

 

 

lift tape

STEP 5:  Lift the tape to
make contact with the wall.

 

 

form tape

STEP 6:  Form the tape over the edge so
that it stretches and bonds to all surfaces.

 

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