We are designing a pitched roof for our 1950s-era home that has an almost-flat torch-down roof ... existing exterior walls with a small “knee wall” built into the truss to boost them over ...

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.