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:We would appreciate your advice regarding our San Francisco home's roof. We have a 1915 Edwardian with a flat tar-and-gravel roof in one of the "sunny" San Francisco neighborhoods. We've had the ...

Q. I have a tar-and-gravel roof that has some blisters. It probably should be replaced within a year or so. Do you have any suggestions on what I can do to extend its life?

Q: We have a two-story house built with a back patio that is covered by a tar and gravel roof. Now when I look out on that roof, most of the gravel is gone. It apparently washed off in the rain over ...