Q: When you were writing about roof repair and replacement, I never saw anything on tar-and-gravel roofs. I just bought a house. At my prepurchase inspection, I was told the roof was in pretty good ...

Q–Our 26-year-old home needs a new roof. The architect who designed the house advised us to consider a roof that is first covered with tar, then a layer of stones. The roof, which has a very low pitch ...