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EPDM ROOFING:  OUTSIDE EDGES

FOLDED OUTSIDE EDGES: The simplest and most reliable way to seal the intersection of two outside edges is simply to bend the sheet over the edges and gather the excess rubber to form a triangular projection. Since bonding adhesive is applied to the underside of the rubber when the sheet is installed, the triangular projection becomes internally adhered. No external adhesive is required: just fold the projection to one side, secure it with a Termination Bar, and caulk the top.

 

fold down over edge

STEP 1:  Bend and adhere
the rubber over both edges.

 

 

gather rubber into ear

STEP 2:  Gather the excess to
form a triangular projection.

 

 

fold ear to one side

STEP 3:  Fold the triangle to one side.

 

 

screw termination bar

STEP 4:  Clamp the folded
rubber with a Termination Bar.

 

 

caulk the fold

STEP 5:  Caulk the open top of the fold.

 

 

TAPED OUTSIDE EDGES: As an alternative, the intersection of two outside edges can be cut and flashed with tape. Since bonding adhesive is applied to the underside of the rubber when the sheet is installed, once the excess rubber is trimmed all the rubber at the outside edge is fully adhered. A disc of Uncured Laminate Tape can be stretched and formed around all three surfaces at the corner: using a hot-air gun to soften the tape will make this process easier.

 

slit overhanging rubber

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

 

 

fold the rubber over the roof edges

STEP 1:  Fold and adhere the rubber
over both edges, pressing into the tape.

 

 

trim excess rubber

STEP 2:  Cut off the excess rubber.

 

 

place a disc of tape

STEP 3:  Cut a disc of Uncured Laminate
Tape and position it over the corner.

 

 

stretch the tape

STEP 4:  Form the tape so that it
stretches onto all surfaces without folding.

 

 

form the disc

STEP 5:  Press the tape firmly
so that it bonds to all surfaces

 

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