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Drywall cracks: which ones matter and which ones don't
Most cracks in a Central Texas house are the house moving, not the house failing. How to tell which is which before you patch anything.
We are sitting on clay out here. It swells when it finally rains and it shrinks back hard through a dry August, and the house on top of it goes along for the ride. That is the single biggest reason my phone rings about cracked walls, and most of the time it is not the emergency it looks like from three feet away.
The ones that are just the house breathing
- Hairline cracks running diagonally off the top corner of a door or a window. Those openings are the weak point in any wall, and weak points are where movement shows up first.
- Fine straight lines along a drywall seam, or along the joint where the ceiling meets the wall. That is a taped joint doing the exact thing taped joints do.
- Small cracks that opened up in the first year or two of a new build and have not moved since.
Those patch out and stay gone, as long as whatever was moving behind them has settled. Patch it, tape it where it needs tape, feather the compound out wide, match the texture, paint. Done right you should not be able to find it afterward, which is the entire point of the job.
The ones I would want to look at
- Cracks wide enough to get a fingernail into, or wide enough to throw a shadow.
- Stair-step cracking, especially anywhere near a corner of the house.
- A crack you have already patched properly that has come back in the same spot.
- Cracking that shows up the same season as a door that has started sticking, a window that suddenly fights you, or a floor that has picked up a slope.
- Any crack with staining around it. That is a water question first and a drywall question a distant second.
None of that automatically means something serious. It means the crack is a symptom rather than the problem, and filling it just removes the evidence while whatever caused it carries on. I can make that wall look perfect. I cannot make it stay that way if the cause is still working.
Why the repair shows, when it shows
A patch you can pick out afterward is almost always one of three things. The compound was not feathered out far enough, so there is a low ridge that jumps out the moment light rakes across it. The texture was not matched, so the patch reads as a smooth island in a knockdown wall, and matching texture is a skill of its own. Or it was spot-painted onto a wall whose paint has been aging for years, so the new paint sits brighter than everything around it.
All three are avoidable. All three take longer than the shortcut. That is most of what you are paying somebody to get right.
If a crack has you worried, photograph it with something next to it for scale, then photograph it again a week later. If nothing has changed, it is very probably the house breathing. If it has changed, call me.
Related: Drywall Install & Repair
I get asked for drywall install & repair most often in Leander, Hutto.
More from the blog
- How I price a job, and why I won't guess over the phone
- The new-build punch list your builder never came back for
- Is your shower failing, or just ugly?
- Before you call anyone: the photos to send
- One visit or three? How to group a punch list
- Why a texture repair shows, and how matching actually works
- Choosing flooring that survives a Central Texas house
- Gutters: what they are actually protecting, and when to clean them
- After a Texas storm: what to check, and in what order
- Cabinets: reface, repaint, or replace?
- Interior painting: the preparation is the job
- Building outdoors in this sun: what actually lasts
Ready to get that list handled?
Send a few photos and I'll tell you what it takes, in writing, before anything starts. I work across Leander, Cedar Park, Georgetown, Round Rock and the towns nearby.