Flashings

ASTM International proposes standard

ASTM International has proposed a new standard, ASTM WK27666, "Practice for Electrical Conductance Methods for Locating Leaks in Exposed or Covered Waterproof Membranes," to ensure waterproofing membranes on buildings are performing as intended. The practice will be useful to architects, specifiers, membrane manufacturers, roofing contractors, warranty providers and building owners to test, verify and monitor the integrity of waterproofing membranes. The standard applies to polyethylene, polypropylene, polyvinyl chloride and bituminous material membranes.

"The proposed new standard will provide a practical and reliable way to test the integrity of waterproof membranes on modern roofing assemblies," says ASTM International member David Vokey, president and CEO of Detec Systems LLC, Bellingham, Wash. "The described tests are used on both conventional and protected roofs and are particularly useful for roof designs that incorporate a waterproofing membrane under a green roof, wear course or topping slab where direct inspection of the roof membrane is difficult or impossible."

Subcommittee D08.22 on Waterproofing and Dampproofing Systems, part of ASTM International Committee D08 on Roofing and Waterproofing, is developing the standard. The subcommittee also hopes to develop a proposed new standard guide for permanently installed roof membrane monitoring systems that describes how to report the condition and location of any developing issues in waterproofing membranes.

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