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Serving Alberta's Roofing Industry Since 1961

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EPDM Section 9: Protected Membrane and Combination Design

EPDM-9.1 General


A protected membrane roofing design is an insulated and ballasted roofing system in which the primary insulation is applied above the E.P.D.M. membrane and retained in place by ballast.


A combination roofing assembly is comprised of a conventional insulated membrane system where the primary E.P.D.M. membrane is covered with insulation held in place with ballast.


E.P.D.M protected membrane and combination designs are not accepted for issuance of the Warranty Certificate.