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Old 06-26-2012, 09:10 AM   #1
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metal over shingles


I'm in northern New Hampshire and have a second home that needs a new roof. It has one layer on shingles I'm wanting to install a metal roof over it. My plan is to install Grace Tri-Flex over the shingles then the metal roofing. No means of taking shingles off because of disposal. So will this plan be OK?

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Old 06-26-2012, 03:09 PM   #2
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metal over shingles


Carefully read the instructions of your metal roofing.
But.... Probably not allowed.

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Old 06-26-2012, 03:19 PM   #3
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metal over shingles


Contacted metal roof co. Tri-flex is fine over one layer of shingles heat rated up to 240 degrees. All set thanks
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Old 06-27-2012, 09:26 AM   #4
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metal over shingles


Yep.

You need a proper slip layer regardless and if the poly in this case is rated for the heat...you are good.
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