UL 90 | Hurricane Concerns | Archive | Ask The Experts Forum

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I am trying to determine the correlation between a UL-90 wind rating and wind speed in mph.	Guest User 1/27/2006	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/7510/find/
This is pretty complex, including a safety factor of two which is imposed on metal roofs under the building code. However, if a product has passed UL 90 testing, then it would be simulating the effects of winds in excess of 200 mph. However, keep in mind that, in an actual windstorm, proper installation of the roof is critical. Additionally, wind-blown debris and structural movement can impact roof performance.	Todd Miller Isaiah Industries, Inc. 1/30/2006	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/7511/find/
200 mph? not true	Guest User 9/16/2010	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/7512/find/