Drywall Cracks: What Each Type Means and What Causes It

Most drywall cracks are cosmetic, caused by a house settling, framing drying out or humidity changes. A few point to something bigger. The shape and location of a crack usually tell you which.

Hairline cracks at seams

Thin, straight cracks along a seam between drywall panels are the most common kind. They happen when the tape over the seam wasn't fully bedded or when the house moves slightly. They're cosmetic, but they come back unless the seam is re-taped.

Cracks above doors and windows

Cracks running up and out from the corners of doors and windows are stress cracks. Openings are weak points, so settling and framing movement show up there first. Usually cosmetic; if they're wide, growing, or doors and windows have started sticking, have the structure looked at.

Cracks where the wall meets the ceiling

A crack along the joint between wall and ceiling often comes from truss uplift: roof trusses flex slightly with temperature and humidity and pull the ceiling up. It tends to open and close with the seasons. It's rarely structural, but it needs a flexible repair rather than more compound. See are ceiling cracks a sign of a bigger issue?

Corner cracks

Inside corners crack when the tape lifts or the framing moves. See why corners crack and how they're fixed.

Nail pops

A small round bump or crack over a fastener is a nail pop. Framing lumber shrinks as it dries, and the nail head pushes out. The fix is to reset the fastener with a screw, then patch, texture and paint.

Stair-step and diagonal cracks

Large diagonal or stair-step cracks, especially with gaps that are wider at one end, can mean foundation movement. These are worth having inspected before they're patched.

Cracks after a renovation

New framing and fresh drywall often show a few small cracks in the first months as the wood dries and the house adjusts. It's normal, and they're usually a quick repair.

Florida humidity and cracks

Humidity makes framing swell and shrink, which works at seams and corners. Keeping your home's humidity steady helps: run the air conditioning consistently, use bathroom and kitchen fans, and keep gutters clear so water drains away from the house.

Cracks with water stains

A crack with a brown stain, bubbling paint or soft drywall around it points to a leak. Fix the source first, then repair the drywall. See repairing drywall stains and water damage.

Fix small cracks early

A small crack is a small repair. Left alone, cracks grow, tape peels and the repair gets bigger. Our article on why garage ceilings crack covers another common spot.

Crack repair in Orlando

New Ceilings repairs wall and ceiling cracks across Orlando and Central Florida, re-taping where needed and matching the texture and paint so the repair doesn't show. See drywall and ceiling repair.