Repair or rebuild?
| What we find | What we recommend |
|---|---|
| Hairline cracks, crown otherwise solid | Clean and seal with an elastomeric crown coating |
| Wider cracks, small broken corners | Patch with crown repair compound, then seal |
| Crumbling, loose or missing sections | Remove and rebuild |
| Thin mortar "wash" with no overhang | Rebuild as a proper crown. A wash will keep cracking |
How a proper crown is built
- Poured with a crown mix, not regular bricklaying mortar
- Thick enough to resist cracking, and sloped away from the flue
- Overhangs the brick on every side with a drip edge, so water falls clear of the chimney face
- A bond break and expansion gap around the flue tile, so the tile can move with heat without cracking the crown
Why crowns crack in Dallas
Concrete expands in summer heat and contracts in cold. DFW had 52 days at or above 100°F in 2026 and averages 29 freezes a season. Each cycle widens small cracks, and water that gets in during a freeze expands and breaks the crown further. Hail adds impact damage on top.
A crack you can see from the ground is already letting water reach the brick and flue below.
Questions about crown repair
How much does crown repair cost?
Cost guides list crown sealing at about $150–$400 and full replacement at about $1,000–$3,000. Our written quote follows the inspection. See the Dallas price guide.
Can I see crown damage from the ground?
Sometimes. Look for dark water stains on the top courses of brick, white powder (efflorescence), or chunks of concrete on the roof. Most crown damage is only visible from the roof, so we include it in every inspection.
How long does a crown rebuild take?
Most crowns are rebuilt in a day on site, then need time to cure before they're sealed.