Walls are where most people first notice something’s off. A crack over a door, a line across a stucco wall, a gap where the ceiling meets the wall. Walls are finishes. They crack from shrinkage, humidity, settling framing, and sometimes from real foundation movement below. This page helps you sort out which is which.
Inside the house: drywall and plaster
Usually cosmetic:
- Hairline cracks along tape seams, especially at ceiling joints.
- Short cracks at the corners of doors and windows that haven’t changed in years.
- Nail pops (little round bumps) in drywall.
- Fine spiderweb cracking in old plaster in pre-war cottages.
Worth a closer look:
- Diagonal cracks running up from door or window corners at roughly 45 degrees, especially if they’re getting longer.
- Cracks wider at one end than the other.
- Cracks paired with doors that stick or no longer latch.
- Gaps opening between walls and ceilings, or between walls and floors.
- The same crack coming back after it’s been patched and painted.
These can mean the foundation under that part of the house has moved. See foundation cracks and uneven floors.
Outside the house: stucco
If your house has stucco, it has cracks. It’s a thin cement plaster over lath, and it shrinks as it cures.
Usually cosmetic: fine random cracking, short cracks at window corners, and hairlines that follow the framing behind.
Worth a closer look: long diagonal cracks, cracks that step or offset, horizontal cracks near the bottom of the wall (the “weep screed” area), and cracks that line up with a crack in the foundation below.
On homes near the beach, stucco cracks can also let moisture in, which is hard on framing and on any steel lath. It’s worth sealing even the cosmetic ones.
What’s different about Encinitas walls
- Old cottages, old plaster. The pre-war and mid-century cottages near the 101 often have plaster that’s been patched many times. Old plaster cracks just from age and seasonal humidity. We look for patterns, not just cracks.
- Additions. A lot of cottages have been added onto over the decades. The joint between old and new foundations is a very common crack location. Different foundations settle differently.
- Hillside homes. On sloped lots in the Cardiff hills and Olivenhain, cracks that concentrate on the downhill side can signal movement in that direction. See hillside and inland bluff foundations.
- Earthquakes. Even small quakes can crack finishes. The City’s hazard annex notes the Rose Canyon Fault lies about 2.5 miles offshore at its closest point. Wall cracks after shaking are worth documenting. See seismic retrofit.
A quick home check
- Photograph each crack with a date and something for scale.
- Mark the ends lightly with a pencil.
- Check doors and windows in that area. Do they close and latch?
- Put a marble or small ball on the floor near the crack. Does it roll consistently one way?
- Look at the outside of the same wall and at the foundation below it.
If the crack grows, other symptoms show up, or you find a matching crack in the foundation, that’s the time to call.
What we do
On a visit we look at the crack pattern across the whole house, measure floor levels, and check the foundation directly under the problem area. Often the walls are just being walls. When they’re telling us something about the foundation, we trace it down, coordinate with licensed engineers as needed, and explain the options. See foundation inspection and settlement repair.
Questions we hear around town
Our painter says it’s “just settling.” Is that true?
Sometimes. “Settling” covers everything from normal aging to real foundation movement. Pattern and change over time tell the difference.
There’s a crack along the middle of our ceiling. Foundation?
Usually not. Ceiling cracks along drywall seams or framing lines are more often seasonal humidity or framing movement. If a ceiling crack matches up with wall cracks and sticking doors in the same area, the foundation moves up the list.
Why is there a gap where the chimney meets the house?
Chimneys are heavy and often sit on their own footing, so they can settle or lean on their own schedule. A gap that’s growing, or a chimney tipping away from the wall, is worth a look, especially since masonry chimneys and earthquakes don’t get along.
Is one crack enough to worry about?
Rarely. Foundation problems show up as a pattern. One crack is a reason to watch, not panic.
Get a Free Quote
If the pattern worries you, send a few photos and your neighborhood and we’ll come look.