Is my roof ok?
I was doing a roof inspection the other day and I took these pictures. Black spots are in certain areas. Is this ok? When I run my hand across the spots there is a gritty feeling. They have be...
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If it's mold or mildew then it doesn't hurt anything (and since it's in places that stay wet longer, I think that's what it is). OTOH if it's the black rubber showing through then your its nearing the end of its life and a coating will make it last longer.
