Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
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.
HeatShield Chimney Cleaning in San Antonio, TX | Alcott Chimney San Antonio
We provide independent HeatShield service across San Antonio, and the one thing that makes our HeatShield work here different is that we know exactly what this city does to a chimney. Between the summer humidity, the brief winter freezes, and the chimney swifts that move into older flues every spring, a HeatShield system in San Antonio faces conditions most installers never plan for. We do. Call (903) 515-5079 for a straight answer and a real quote.
Alcott Chimney San Antonio is an independent HeatShield service provider. We are not manufacturer-affiliated or authorized, which means we answer to you, not to a brand rep. We use genuine HeatShield Cerfractory materials on every repair because they are formulated for high-temperature flue environments, not because anyone requires us to. We also service our HeatShield sales & service customers across Bexar County, and we have earned our reputation the slow way: one chimney at a time, since 2002.
Why San Antonio Residents Choose Us for HeatShield Service
Ruben Castellano picked up his trade through the building and construction program at Los Angeles Trade-Technical College and has worked chimneys across the Southwest ever since. He has been serving San Antonio homeowners for well over a decade, and his crews have worked on hundreds of HeatShield ceramic-coated flue systems in this city, from original clay-tile liners in King William Victorians to post-war masonry chimneys in Terrell Hills. That is practical knowledge. We know how HeatShield performs under local freeze-thaw and humidity cycles because we have watched it perform, year after year.
Every Alcott technician is background-checked and identity-verified under the Threshold Standard. You will know the technician’s name and see their photo before we arrive, and they will show their photo ID at the door. We also write the price down before any work begins. That is not a courtesy. It is the way we have operated since 2002.
Styles & brands we work with
Common HeatShield Chimney Cleaning Problems We Solve in San Antonio
HeatShield is a good system, but it lives inside a San Antonio chimney, and the weather here does not negotiate. Here is what we routinely find:
- Cracked or spalled original clay tile liners behind HeatShield applications. San Antonio’s freeze-thaw cycles put real stress on old masonry. Water works into hairline cracks, freezes during our brief winter snaps, and widens them. The HeatShield coating can look intact from the outside while the tile underneath is failing.
- Deteriorated mortar joints between flue tiles. Summer humidity softens the old lime mortar in historic chimneys. HeatShield joint sealant protects the surface, but if the mortar underneath was already compromised, we find gaps reopening behind the sealant.
- Flue sealant delamination from thermal shock. A hundred-degree San Antonio summer followed by a thirty-degree night is exactly the kind of temperature swing that makes ceramic coatings separate from old clay tile. We see this most often in central-city homes with unlined exterior chimneys.
- Chimney swift nesting that compromises HeatShield-coated surfaces. Inside Loop 410, spring and early summer bring swifts into unprotected flues. Their nests block airflow, trap moisture against the HeatShield surface, and leave behind material that has to be removed before any repair or cleaning can happen.
- Damaged chimney caps and crowns after hail events. San Antonio gets thunderstorms and occasional hail in spring and fall. A cracked cap or crown lets water pour down the flue and sit against the HeatShield coating, which accelerates spalling behind it.
HeatShield Service in San Antonio: What Local Conditions Mean for Your Equipment
Here is something a generic HeatShield page will not tell you. In the historic districts inside Loop 410, most HeatShield-lined flues are only open during burning season. By spring, the damper is closed and the cap, if there is one, has gaps around it. That is when chimney swifts get in. In neighborhoods like King William, Monte Vista, and Alamo Heights, we regularly open flues during late-spring inspections and find a two-to-three-foot swift nest sitting directly on top of HeatShield-coated tiles. Federal law protects these birds, so we cannot just pull the nest and go. We schedule cleanings outside nesting season or coordinate removal before applying or repairing HeatShield coatings, then install a proper stainless cap to prevent re-entry. This is nearly unheard of in newer suburban areas like Stone Oak, where factory-built fireplaces are the norm and masonry flues are rare. No brand manual covers it. Our crews do.
Our tech inspected a 1920s bungalow in Monte Vista where a previous homeowner had applied HeatShield joint sealant over original clay tiles. Using a Chim-Scan camera, we found hairline cracks reopening behind the sealant from freeze-thaw spalling, so we removed the loose material, applied fresh HeatShield Cerfractory to the joints, and installed a custom stainless cap to keep out chimney swifts that had nested the prior spring.
HeatShield Models & Products We Service in San Antonio
We service the full HeatShield line: the Cerfractory Flue Sealant, the Joint Repair System, the Resurfacing System, and the CeCure Sleeve Relining System. When a HeatShield liner is beyond repair, severe structural cracks or multiple missing tile sections, we do not patch it. We recommend a CeCure stainless steel sleeve reline instead. We stock genuine HeatShield Cerfractory materials for fast turnaround in San Antonio, and we do not substitute generic sealants. For waterproofing, we use Gelco and Olympia Chimney products. For caps and relining components, we carry Famco and Copperfield.
See the difference
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AfterHeatShield Service Pricing in San Antonio
A standard Chimney Sweep - San Antonio typically runs $200 to $350 before any repairs. A Level 2 inspection, which is what we recommend before any HeatShield assessment, runs $300 to $500. HeatShield joint repair on a single-story masonry chimney in central San Antonio typically lands between $800 and $1,800, depending on how much of the flue is accessible and how much nesting material we have to remove. Full HeatShield resurfacing runs $3,500 to $7,000 on a typical two-story home. A CeCure stainless sleeve reline, when the original liner is beyond saving, starts around $4,500 and goes up with height and access. The biggest cost driver in San Antonio is access: a steep roof on a two-story King William Victorian is a different job than a single-story ranch in Oak Hills. Call (903) 515-5079 and Ruben or one of our senior techs will give you a written number before any work starts.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio 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 – HeatShield Chimney Cleaning in San Antonio
No, not until the nest is gone and the flue is cleaned. Federal law protects chimney swifts, so we either schedule the work outside nesting season or coordinate proper removal before applying any HeatShield material. Once the flue is clear, we can assess whether your existing HeatShield coating is still sound. Call (903) 515-5079 and we will tell you exactly what we find.
Moisture gets behind the HeatShield layer through cracked crowns, failed mortar, or missing caps, then freezes during our brief winter snaps and widens whatever crack it found. The HeatShield surface can look fine from the top while the tiles behind it are spalling. That is why we pair every HeatShield repair with a camera inspection and waterproofing on the exterior masonry. You cannot fix the inside while water keeps coming in from the outside.
HeatShield resurfacing is a long-term repair, not a magic one. In a King William home with original clay tile liners, it buys you years of safe burning, but it does not fix the masonry around it. If the chimney crown is cracked or the brick is absorbing water, the cycle starts over. We will tell you what else needs attention before you spend the money. That is Ruben’s rule: straight answer first.
Yes, every time. In neighborhoods inside Loop 410, a HeatShield job without a proper cap is an invitation for swifts to move back in next spring. We install stainless caps from Famco or Copperfield sized to your flue and welded or bolted secure. It adds roughly $300 to $600 to the job, and it is the single best thing you can do to protect your HeatShield investment in this city. Call (903) 515-5079 for a written quote that includes the cap.
The HeatShield coating itself holds up to humidity. What fails is the structure around it: the cracked crown that lets water in, the rusted cap that deflects hail into the flue opening, the old mortar that softens in the damp. HeatShield is designed for fire, not for solving a water intrusion problem. If hail damaged your cap or crown, we need to address that before any HeatShield repair makes sense.
Service Areas Near San Antonio
We work across San Antonio proper, plus HeatShield service in Schertz, HeatShield service in Cibolo, Boerne, Alamo Heights, and Windcrest. If you are inside or near the San Antonio service area, call us and we will book a sweep or inspection at your convenience.
Book Your HeatShield Service in San Antonio Today
Call (903) 515-5079 and a live person answers. We will talk through what you are seeing, schedule an inspection or cleaning, and send you the technician’s name and photo before we show up. Written price before any work starts. Done right, for a full year, or we make it right. That is the 365-Day Done Right Promise.
Written by Ruben Castellano, Owner at Alcott Chimney San Antonio, serving San Antonio since 2002.