Can metal roofing be installed over asphalt roofing?
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I would say so, yes, tho check with a good hardware store, just to be sure. Best wishes, J.
You probably can but Id make sure the under side of the asphalt roofing material is ok.
It will void the warranty. Plus any future insurance claims for roof damage do I do not recommend it.
Yes you can just not sure about warranties and insurance coverage
I had a metal roof put on my house about 4 years ago and I was told that yes you could but it was not the best idea for the long run. You will have a much more secure rough that will last you much longer if you take the shingles off first.
ABSOLUTELY , had my shop roof done 4 yr,s ago , they put the metal roof right over the asphalt tiles just took out the bad tiles near edge of roof is all .
This is a debatable question among roofers. Some say yes. Some say no. All depends on local building codes, layers of existing roofing material, and insurance coverage. There are many pros and cons.
https://www.whirlwindsteel.com/blog/bid/407222/can-a-metal-roof-be-installed-over-an-existing-roof
Yes!
Yes, of course. I would, for example, recommend you guys from Al’s Union Roofing (Philadelphia). They also have a website: https://alsroofing.org/