Asphalt shingle manufacturers and the Asphalt Roofing
Manufacturers Association (ARMA) are beginning to introduce a new
methodology for testing and reporting the wind resistances of
asphalt shingles. Following is a brief overview of this new
methodology and how designers and contractors can use it.
Unlike membrane-type roof systems (built-up, single-plies),
which provide for continuous air barriers, asphalt shingle roof
systems are recognized to be air-permeable. As a result,
conventional wind-test methods do not yield representative results
when used on asphalt shingle roof systems.
Since the early 1990s, asphalt shingle manufacturers and ARMA
have conducted extensive research into better quantifying the wind
resistances of asphalt shingle products. The research culminated in
the development of two new test methods: UL 2390, "Test method for
wind resistance of asphalt shingles with sealed tabs," and ASTM
D6381, "Standard Test Method for Measurement for Asphalt Shingle
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