
A crack running up the chimney, or a stack leaning off the house?
- A stair-step crack climbing the mortar joints
- A gap opening between chimney and wall
- Doors sticking and drywall cracks appearing in the same season
Why it happens in Dallas: North Texas sits on expansive clay that swells with rain and shrinks in drought, and the whole house moves with it. A chimney is the tallest, stiffest thing on the structure, so it shows that movement first. A stack pulling away from the wall or a fresh crack up a mortar line here is as often a foundation story as a weather one, and the repair is different in each case.
What fixes it, and what it costs
First, the honest diagnosis: weather damage and foundation movement crack chimneys differently, and the repair budget goes to very different places. We read the crack pattern, check plumb, and tell you which story this is. Masonry repair follows only once the cause is named: repointing a stack the soil is still moving is paying twice.
- Repointing one face
- $400–$1,200
- Flashing reseal or replacement
- $300–$1,000
- Crown seal
- $200–$500

























