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Exova, the global testing, calibration and advisory services provider, has invested in dynamic wind uplift and air barrier apparatus to conduct testing of roof assemblies in Mississauga, Canada.

Exova can now test roof membranes and air barriers in a horizontal configuration in accordance with CSA A123.21 and CAN/ ULC-S742. These Standards will be a requirement for all roofing systems in the future National Building Code in Canada and this investment makes Exova the only laboratory in the world to test to both standards.

The wind uplift test determines the resistance of membrane roofing systems when subjected to dynamic wind load cycles, for both mechanically attached-membrane roofing systems and adhered-membrane roofing systems. The apparatus can also measure air leakage rates to evaluate roofs as an air barrier system.

As roof construction and technology change and concerns in the industry grow around new roof systems being caught by uplifting winds, test methods need to be updated to ensure they adequately reflect the qualities of membrane roof systems. Exova worked with the National Research Council Canada– Institute for Research in Construction (NRC-IRC) - and manufacturers to commercialise test methodology to align with the requirements of the National Building Code.

Aurobindo Das, EVP of building products at Exova, said: “We were instrumental in the development of test methodologies because we know how vital it is to offer up to date and technically demanding testing for our customers. We now offer a one stop shop in Canada for evaluating roof systems, and we’ll soon be accredited to test future roof air barrier system assemblies in accordance with wall assembly standards currently being adapted to include roofing systems.”

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