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TOPIC: Moss Buildup

Moss

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I would like to put metal roofing over my composite roofing. The composite roofing has moss growing on it. Do I have to get rid of the moss or will covering it with metal roofing kill the moss and hence get rid of it? Thank you. Karen
Guest User

10/7/2004
I would clean it off as well as you can but, once you put a layer of underlayment over the old shingles and seal them off from moisture, the growth should die pretty quickly. I would bring this question up with the manufacturer of your new roof.
Guest User

10/8/2004
We bought a fixer-upper and found that the house was added on to in the mid 70s. When they built the extention they didn't remove the old mossy roof - they just cobbled together some bracing and built the new roof over top of the old. The moss is still there to this day.
Guest User

1/6/2009
Was it alive?
Todd Miller
Isaiah Industries, Inc.

1/7/2009
It would greatly surprise me if it was alive. For moss to live it needs both water and a food source. - If properly sealed, it wouldn't have water getting to it - Being under another roof, it would use up its food source, because leaves, dirt, and branches wouldn't be able to fall onto it.
Nate Libbey

1/7/2009
I agree.
Todd Miller
Isaiah Industries, Inc.

1/14/2009