Asphalt, wood shakes, slate and other overlapped roofings are fine until they meet an obstruction. Up against a dormer, a vent pipe, a chimney, they need flashing — a patchwork of metal sheets, and ...

Q. The roof on my house is just a big flat area. I've seen similar style houses that have a dormer on the roof. This structure makes the house far more interesting. What does it take to add a dormer ...