Masonry repair
Sweep & inspection
Caps & crowns
Flue relining
Gas fireplace serviceLevel 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Fast, Reliable Gas Fireplace Repair Across Kirby
Gas fireplace repair in Kirby, TX typically runs $180 to $340 for common fixes like thermocouple or pilot assembly replacement, and $1,900 to $3,800 when a new flue liner is required. Most calls are diagnosed and repaired the same visit. Kirby’s mid-century ranch homes present a specific set of problems you won’t find in newer subdivisions on the north side: original clay-tile flues, unlined brick chimneys, and decades of wood-burning residue that gas appliances now vent into. We know these homes because we work on them every week. If your gas fireplace is acting up, call (903) 515-5079 and we’ll get a technician to your Kirby home quickly.
Why Alcott Chimney San Antonio Is Kirby’s Preferred Gas Fireplace Repair Company
Alcott Chimney Sweep has been in the chimney business since 2002, and Ruben Castellano runs our San Antonio operation with a simple rule: show the customer what the camera shows, explain it in plain English, and never recommend a repair the homeowner hasn’t seen with their own eyes. That matters a lot in Kirby, where original mid-century chimneys are often misdiagnosed. Our Gas Fireplace Repair team sees the same brick bulging near the roofline on Ackerman Road, Carlson Drive, and Binz-Engleman area homes, and we know what it means: heat-damaged mortar, and usually a flue that needs real attention.
Every Kirby job includes a written price before work begins, and a written guarantee on every repair. If the repair fails within 365 days, we come back free. That’s the Done Right Promise, and it’s not an add-on. You’ll also know your technician’s name and see their photo before the truck pulls up. Background-checked, identity-verified, and in uniform, required to show a photo ID badge at the door. Always. That’s the Threshold Standard.
Styles & brands we work with





Our Gas Fireplace Repair Services in Kirby
Flue Liner Installation and Repair
This is the repair we do most often in Kirby, and the one most likely to be upsold by companies that don’t show you the damage. In a standard Kirby ranch home from the 1960s, the original chimney was built for wood. The clay tiles crack, the mortar joints wash out, and now a gas fireplace is venting into a passage that leaks. We install DuraFlex and HeatShield liner systems, both professional-grade materials specified for this exact condition. You’ll see the cracked tile and missing mortar on camera before we quote a liner, every time.

Smoke Chamber Repair
Smoke chambers in Kirby’s older homes typically have corbeled brickwork that was never parged. Decades of use and moisture absorption leave them rough, misaligned, and a fire hazard. We rebuild and repair smoke chambers using trade-grade materials like Gelco and Olympia Chimney products, not improvised substitutes. When we finish a smoke chamber in a Kirby home, it’s smooth, properly angled, and verified by camera from top to bottom.

Firebox inspection and Spalling Repair
Spalling brick in the firebox tells a story about moisture. Kirby’s hot, humid summers and occasional cold snaps drive moisture into porous masonry, and when it dries and contracts, the brick face pops off. We inspect fireboxes for spalling, cracked refractory panels, and rusted log grates, then explain clearly whether the damage is cosmetic or structural. If it needs repair, you’ll get the price in writing first, and the work carries our written guarantee.

Gas Log Set Service and Venting Correction
A lot of gas fireplaces in Kirby were retrofitted into fireplaces built for wood, and the venting wasn’t always done right. We service log sets, check burner alignment, verify gas pressure at the valve, and confirm the flue is sized and lined appropriately for the appliance. If the original unlined chimney was never addressed, we’ll show you on camera and discuss whether a liner is needed now or can be scheduled.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Kirby
We install and service DuraFlex liner systems and HeatShield resurfacing, plus Gelco and Olympia Chimney products. These are the brands chimney professionals specify for mid-century masonry work, not box-store substitutes. Because our San Antonio office stocks these materials, Kirby customers don’t wait long for parts. When we quote a liner or a smoke chamber repair, the product name goes on the written estimate. You’ll know exactly what’s going into your chimney.
See the difference
Before
After
Before
After
Before
AfterCommon Gas Fireplace Repair Problems We See in Kirby Homes
- Cracked clay tile flue liners. Most Kirby homes from the 1950s-70s have original clay tiles, and decades of heat cycling have cracked them. When a gas fireplace runs during a cold snap, carbon monoxide and smoke can escape through those gaps into wall cavities and living space.
- Hardened creosote off-gassing. Even if you converted from wood years ago, old creosote sits in the flue. During Kirby’s long humid seasons it absorbs moisture, then when the gas fireplace lights up, it off-gasses or, in enough quantity, contributes to a chimney fire.
- Bulging brick near the roofline. That slight outward bulge on older Kirby chimneys is heat-damaged mortar, and it means water has been getting in for a while. Inside, the flue is usually in worse shape than the outside suggests.
- Deteriorated mortar joints and spalling masonry. Kirby’s freeze-thaw cycles, brief as they are, still do damage. Water sits in mortar joints, freezes, and expands. The brick spalls, the joints open wider, and the chimney slowly deteriorates from the top down. Most homeowners don’t see it until a Level 2 camera inspection.
Pricing for Gas Fireplace Repair in Kirby, TX
We believe in telling you the cost range before you decide anything. A standard gas fireplace repair in Kirby, repairing a thermocouple, pilot assembly, or faulty wall switch, typically runs $180 to $340. Gas valve replacement runs $290 to $520. Firebox spalling repair usually lands between $300 and $700 depending on how much brick or refractory panel needs replacing. A new DuraFlex flue liner for a single-story Kirby ranch runs $1,900 to $3,800, including the camera inspection so you see the damage before and the result after. A Level 2 camera inspection itself runs $175 to $300, and we recommend one before any liner work. Every quote is written, fixed, and given before work starts. Call (903) 515-5079 for an exact price on your Kirby home.
We Also Serve Cities Near Kirby
Our San Antonio office dispatches technicians to Kirby and the surrounding communities, including San Antonio, Schertz, Cibolo, and Boerne. If you’re just outside Kirby in one of those areas, the same flat-price, written-quote process applies, and the same name-and-photo technician preview before every visit.
Serving Kirby, TX - Our Local Coverage Area
We’re based in the Kirby area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs – Gas Fireplace Repair in Kirby
Because the original chimneys in Kirby’s 1950s-70s ranch homes were built for wood, with clay tile liners or no liner at all. After fifty or sixty years, those tiles are cracked and the mortar joints are gone. When a gas fireplace vents into that deteriorated flue, it can leak carbon monoxide into the house. A new DuraFlex or HeatShield liner is usually the fix. We’ll show you the cracks on camera before you spend anything. Call (903) 515-5079 to schedule an inspection.
Rarely, and only if the chimney is in near-perfect condition and a Level 2 camera inspection verifies it. An unlined brick chimney was never designed to handle gas appliance exhaust, which is cooler and condenses more readily, soaking into mortar and accelerating decay. In Kirby’s older neighborhoods, we usually recommend a liner. But you’ll see the condition on camera before deciding. Call (903) 515-5079 and we’ll walk you through it.
Kirby’s long, humid summers mean chimneys sit dormant for months at a time. Any creosote or residue inside absorbs moisture, then dries and hardens. That repeated cycle cracks clay tiles and loosens mortar joints faster than you’d think. When a cold snap hits and the gas fireplace suddenly gets heavy use, those compromised flues are already at risk. Pre-season inspection each fall is the smart move. Call (903) 515-5079 to schedule one.
It means the mortar has been heated and cooled past its limit, and the bricks are no longer holding together as one solid unit. Rain gets in, the freeze-thaw cycle does more damage, and the flue inside is usually compromised too. In Kirby, this condition is common in the original unlined chimneys you’ll see in older neighborhoods. We don’t diagnose from the ground. We camera the chimney and show you exactly what’s going on before recommending any repair. Call (903) 515-5079 for an inspection.
Yes. A Level 1 chimney inspection is recommended every year for any fireplace, gas or wood. Gas appliances still produce carbon monoxide, and in Kirby’s older homes with original flues, the venting is the weak point. A $129 Level 1 inspection catches cracked liners and deteriorated mortar before they become emergency repairs. Call (903) 515-5079 to book yours.
If your gas fireplace in Kirby is showing signs of trouble, a weak flame, a clicking sound that won’t light, a smell of gas when it’s running, or just a chimney you haven’t had inspected in years, call (903) 515-5079. Ruben Castellano and the Alcott Chimney San Antonio team will send a named, photo-verified technician to your door with a camera and the patience to show you what’s really going on. Written price first. Written guarantee on every repair. No surprises, just straight answers from people who know Kirby’s chimneys.
Written by Ruben Castellano, Owner at Alcott Chimney San Antonio, serving Kirby since 2002.