Gypsum Wallboard

Gypsum wallboard, also known as “drywall,” is made of gypsum plaster that is pressed between two sheets of paper. These wallboards are most commonly used inside homes to make interior walls and ceilings. The sheets of drywall are attached to your houses framing using drywall screws and finished with a plaster-like joint compound (also known as “drywall mud”) that is used to seal joints and screws.

Nail Pops

The drywall screws used today stay in their final positions much better than the drywall nails that were commonly used during renovations and new home construction. Nails are still used to hold the wallboard in place initially until it can be screwed down. “Nail pops” are caused when wood shrinks and expands, forcing the nails holding the gypsum to work their way through the wallboard. This results in a bump in the drywall as the nail forces its way through the drywall. These nail pops typically appear at the upper edge of a wall or at a truss line on a ceiling.

Nail pops can be repaired by cutting away the wallboard over the nail head that has bulged, pulling the nail with a pair of needle-nosed pliers, or nailing it in further using a punch or replacing it with a screw. The hole is then filled in with joint compound, primed and re-painted.