Flat roofs can strike fear into the hearts of many people but they have come a long way from the problematic, leak-prone versions of the 1980s and before. Nowadays, a well designed and waterproofed ...

Q What is the purpose of gravel on my garage flat roof? Silt and moss has built up around and under the gravel and some areas of the roof have no gravel as it has drifted. Should I remove and replace ...

Q: I enjoyed the article about puddling on flat roofs (Nov. 2, 2002). I have a slope problem on a 12-by-10-foot one-story addition attached at one edge to a higher wall of my split-level house. It is ...