Installing Firestone Epdm Over Existing Roof

If you plan to leave your existing roof covering in place and install a new waterproof membrane over the top you will need to consider the following.

Installing firestone epdm over existing roof.

You can install epdm membrane over an existing roof only if a new layer of 5 8 plywood 5 8 osb board or polyisocyanurate board with a fiberglass backing is used as a barrier to protect the epdm. Each installation phase is illustrated in the above manual with one or more 3 dimensional drawings. Epdm should be bonded over 5 8 plywood 5 8 osb board or polyisocyanurate board with a fiberglass backing. The specification provided to us stated that we were to fully adhere epdm over the existing epdm after washing.

The two part drip trim consisting of a back plate that is nailed flush with the top of the roof deck. The epdm membrane is then sandwiched between this a bead of mastic and the front trim which is finally nailed with stainless steel plastic topped pins to finish. Osb3 or exterior grade plywood are both good deck materials for bonding the new. Without the need for seam tape adhesives or waiting it installs 4 6x faster than standard epdm membrane including seams.

These step by step installation instructions will assist professional installers to cover a roof with a firestone rubbercover epdm system in accordance with the high standards specified by firestone building products. Firestone is one of the biggest manufacturers of epdm roofing. The membrane needs to be completely unfurled and laid flat over the roof surface. Fullforce epdm fullforce epdm is the only epdm membrane to feature a factory applied adhesive across its entire surface.

We were hired by firestone due to our certification with genflex to repair a leaking roof. We are certified by genflex sister company to firestone. Roof edges pdf wall terminations pdf membrane repair pdf miscellaneous pdf for a complete overview of the installation specifications consult the epdm technical guidelines chapter 3 pdf. Can i install epdm membrane directly over an existing roof.

Then the rest phase begins which allows the rubber to expand naturally. On a warm day resting can take approximately 30 minutes.