Q. I live in a mansard-style home with shingles down the entire second floor. On the east side of the roof, lichens have established quite a home. Without ruining the fiberglass shingles, how do I ...

My roof has skid marks. And lichens. Next thing you know, it could grow a mossy beard. What's going on here? And more important, what can I do about it? You might be wondering the same thing, if your ...

Q. I have a 10-foot-by-12-foot tool shed in a shady area with a roof covered with unsightly lichen. Can you suggest any relatively simple way to remove it before I paint the shed? A. Ah, yes, lichen ...

Q: I have a 10-foot-by-12-foot tool shed in a shady area with a roof covered with unsightly lichen. Can you suggest any relatively simple way to remove it before I paint the shed? A: Ah, yes, lichen ...

Q: I have a 6-year-old asphalt shingle roof with a patch of moss on the north side. Is there a safe and effective way to remove it? A: It’s unlikely to be moss. That usually takes longer than six ...

Q. The roof on our cottage has been developing a mossy or lichen coating for the last several years. It doesn't seem to wash off easily, and I'm wondering if it is hurting the shingles. What can we do ...

More than just an aesthetic problem, a mossy roof left untreated can severely damage a home inside and out. (George A.Tsongas) Many people pay more attention than usual to their roofs in the summer ...

Q: I have a newer asphalt shingle roof, but parts of it are covered with moss, lichens and algae. Is a pressure washer the best choice for cleaning roof shingles? Will it remove all of this growth?

Q. What do you think of the products and people who clean roofs of various stains? I have quite a few stains, and wonder if I need to hire a roof cleaner, or buy products such as Roof Begone ($30 a ...

Q: My storage shed roof is covered with lichen, and I am concerned that it will destroy the shingles and cause me to have to put on a new roof. How can I get rid of it? -- Westford, A: Lichen do not ...

Q I have a six-year-old asphalt shingle roof with a patch of moss on the north side. Is there a safe and effective way to remove it? A It's unlikely to be moss. That usually takes longer than six ...