EPDM Membrane To Shingle Transition
When installing an EPDM membrane system with a tie-in to an existing shingle roof, remove a minimum of 3 courses of shingles.
Bond the membrane onto the sloped roof deck. Peel the top of the EPDM membrane back and apply a bead of Water Cut-Off Mastic between the membrane and the deck. Nail the top of the membrane every 15.24cms and install the shingles over the EPDM.
Keep the bottom course of shingles to a minimum of 10.16cm above the roof angle change. To fasten the bottom course of loose shingle tabs to the membrane, lift each tab and apply a 2.54cm long bead of Lap Caulk.