Homeowners with concrete and asphalt driveways often deal with unwanted green patches of moss — that moss thrives in shady or damp areas. Growth can happen year-round, and while it may seem like a ...

Many roofs in my neighborhood, mine included, are covered with black streaks. What’s causing this to happen, and can the roofs be cleaned? I’m able to walk on my asphalt shingle roof with ease but am ...