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TOPIC: Roofing over existing roof

moss growth on existing roof

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I had 3 roof estimates. 2 said we could roof over existing shingles...and the other said he couldn't because we had a lot of moss growth. Can you install metal roofing over shingles that have moss on them?
alice libby

10/4/2006
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Sure, it will die once underlayment is placed over it. It could be sprayed with a bleach solution first if desired. Todd Miller
Todd Miller
Isaiah Industries, Inc.

10/6/2006
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