Fireplace repair in San Antonio
The chimney gets the attention, but a lot of what goes wrong is down at the fireplace: a damper rusted shut, a cracked firebox, a fireplace that smokes every time the wind comes from the north. Tell us what it is doing and a local chimney company calls you back.
Common fireplace repairs
- Damper. The plate that closes the flue. Cast iron dampers rust and stick, especially after a summer of humidity coming down an uncapped chimney. A top-sealing damper, mounted at the top of the flue, also works as a cap.
- Firebox. In a masonry fireplace the firebrick cracks from heat, and so does the mortar between it. In a factory-built fireplace, the refractory panels crack, and some units must use the maker's replacement panels.
- Smoke in the room. A closed damper, a blocked flue, wet wood, a house that pulls air down the chimney, or a fireplace opening too big for the flue. Fixes run from a smoke guard across the top of the opening to a taller chimney.
- Glass doors and screens. Cracked glass, doors that won't seal, missing screens. Glass doors on a factory-built unit need to be the kind the maker lists for it.
- Hearth extension. The noncombustible floor in front of the fireplace. Cracked tiles or a hearth too short for the opening let embers reach the floor.
- Outdoor fireplaces. Common in Helotes and Boerne, and on the bigger lots of the north side. They crack and leak like any chimney, without a house around them to show the stain.
Safety first
The US Fire Administration's advice is to have chimneys and vents cleaned and inspected at least once a year, and to keep anything that can burn at least 3 feet from a fireplace. If smoke has been coming into the room, stop using the fireplace until the flue has been checked; smoke you can see means gases you can't, including carbon monoxide. Fireplaces and carbon monoxide.
What it costs
| Job | Published range | Source |
|---|---|---|
| Chimney repair, typical job | $250 to $1,200, about $750 average | Fixr, Jan 2025 |
| Crown repair | $750 to $1,000 | Fixr, Jan 2025 |
| Chimney cap repair | $100 to $250 | Fixr, Jan 2025 |
| Flashing repair | $200 to $300 | Fixr, Jan 2025 |
| Repointing or tuckpointing | $500 to $2,500 | Fixr, Jan 2025 |
| Chimney rebuild | $500 to $4,000 | Fixr, Jan 2025 |
National published ranges, not a San Antonio average and not a quote. Firebox and damper repairs are priced by the job; ask for it in writing.
Gas fireplaces
A gas fireplace that won't light, keeps going out or smells of gas is a different call. Gas lines are different. Texas law defines plumbing to include piping that supplies gas. Running or changing a gas line to a fireplace is work for a plumber licensed by the Texas State Board of Plumbing Examiners. Gas fireplace service.
Questions San Antonio homeowners ask
Why does my fireplace smoke when I light it?
Most often the damper is not fully open, or the flue is cold and full of heavy air on the first fire. Warm the flue with a rolled newspaper held up toward the damper before lighting. If it still smokes, have the flue checked for a blockage.
Can a cracked firebox be repaired?
Usually. Hairline cracks in firebrick are common; wide cracks or loose brick should be repaired with refractory mortar. Cracked panels in a factory-built unit are replaced.
Is it safe to use a fireplace with a broken damper?
A damper stuck open is mostly an energy loss. A damper stuck closed or partly closed sends smoke and carbon monoxide into the room. Don't light it until it opens fully.