Q: My 50-year-old townhouse has a problem: recurring nail pops that resist repair on either side of a central wall on the top floor. The nail pops are roughly at the house's centerline, front-to-rear.

Dear James: There are lots of nail pops on our drywall joints. When we have our new room addition drywalled, what should be done differently to avoid this? — Mandee L. Dear Mandee: Even after you try ...