We recently bought a house..just small and we love it but the shingles are getting spongy. The previous owners put a preservative on it...which I think was the wrong thing to do....so they started turning almost black...so then they power washed them...another wrong thing maybe? Anyway now they are getting spongy and starting to curl some...is there any way to save them or is it a lost cause....
ILT Vignocchi
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