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I am trying to determine the impact of hail strikes on the useful life of a low slope metal roof. Are there any published guidelines or orgainazations that address this issue? The roof in question is a structural metal panel roof supported on purlins with a 1 to 12 slope. Lemon size hail has resulted in minor denting of the panels and removed approximately 30% of the panel coating in the area of the impact, exposing the underlying primer. The hail impacts have not rusted after 4 months so the underlying metal of the panel has not been exposed. The impacts are 1/2" to 1" in dia. and about 0" to 1/16" deep and number about 10 per square yard of roof area.
Corey
Or copy this URL:
https://www.metalroofing.com/spirit/comment/2316/find/
The indentations themselves may not have any major impact on the life of the roof. It really depends a lot upon whether interlocks have been damaged and whether the watertightness of the roof is jeopardized. I would suggest contacting an experienced metal installer or the roofing manufacturer to do an inspection and help with this determination.
10/7/2003
Or copy this URL: https://www.metalroofing.com/spirit/comment/2316/find/Isaiah Industries, Inc.
10/7/2003
Or copy this URL: https://www.metalroofing.com/spirit/comment/2317/find/