Q: Shortly after it was built, we noticed a slightly lifted-looking horizontal line (shingles not flat as the others) on the upper-left area of the roof when looking at the front of the house. The ...

Can new plywood be installed on a 40-year-old roof without removing the old? Roy Gingrich of Ellicott City has a 40-year-old house with an asphalt shingle roof surface. The existing asphalt shingles ...

Question: I’m in the process of installing a metal roof over an outside deck. My rafters are in place, and now I’m getting ready to purchase and install my flashing and sheathing. I was planning on ...