1.   A. Sometimes, nails will pop after the wooden studs dry out and the nails lose their grip.

2.   Q. The nails are popping on the old clapboards in my triple decker.

3.   Such redriven nails could pop again, so instead, pull them and drive dry-wall screws in their place.

4.   The nails popped in the first place because the clapboards dried out and contracted, and because they were not driven into studs.