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    Field Performance of Single-Ply, Chlorinated Polyethylene (CPE) Roof Membranes

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    This paper will present the results of a field study of 29 different recover roofing systems installed on a variety of buildings. All of the buildings were located in Southeast Texas and were exposed to a variety of conditions related to use, coastal environment and drainage characteristics. Installation methods included mechanically fastened and fully-adhered (fleece-backed) membranes. Substrates included a number of different deck types and original membrane types, as well as various recover insulation materials, including glass fiber, perlite, wood fiber and expanded polystyrene (EPS). A number of these roofs exhibited areas of chronic and long-term ponded water. An intensive visual study was made regarding the effect of ponding on the CPE roof systems and the deterioration occurring in those locations. Laboratory testing on a number of the roofs revealed aging effects on some membrane physical properties. A number of other performance characteristics are assessed and general observations presented, including detailing practices and conformance with industry standards.


    Chlorinated Polyethylene, CPE, single-ply roofing, field investigation, weathering, pin-holing, deterioration, ponding water, construction details, puncture resistance

    Author Information:

    French, WR
    President, French Engineering, Inc., Houston, Texas

    Committee/Subcommittee: D08.20

    DOI: 10.1520/STP13297S