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.
DuraFlex Chimney Cleaning in San Antonio, TX | Alcott Chimney San Antonio
Alcott Chimney San Antonio provides independent DuraFlex Chimney Sweep in San Antonio and liner service across San Antonio, from King William to Stone Oak. We are not a manufacturer-authorized shop, which means we give you straight answers about what your liner actually needs rather than what a brand rep would prefer we sell. The one thing that makes our DuraFlex work different here is what San Antonio’s older chimneys repeatedly show us: the liner is rarely the first thing that failed. The masonry around it usually went first. Call (903) 515-5079 for a free estimate, and we will put a name and a photo in your hands before anyone rings your doorbell.
Why San Antonio Residents Choose Us for DuraFlex Service
We have worked on DuraFlex 316Ti and 304 stainless liners in enough San Antonio homes to know how they interact with this city’s specific housing stock. A 1940s bungalow in Monte Vista with a clay tile flue behaves nothing like a 1990s tract house in Windcrest with a prefab metal fireplace. Ruben Castellano spent years working chimneys across the Southwest before bringing his crew to San Antonio over a decade ago, and the crew can tell you what a liner looks like after ten humid winters, what it looks like after someone dragged a brush through it too hard, and what it looks like when it was installed wrong from the start. We bring genuine DuraFlex components when available and honest aftermarket stainless equivalents that meet UL 1777 when they are not. You get a written price before any work begins, every time, no exceptions.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Solve in San Antonio
- Cracking clay tile liners behind DuraFlex systems. San Antonio’s freeze-thaw cycles, even the brief ones, expand and contract the original clay tile surrounding many DuraFlex liners. Once that tile spalls, creosote packs into the gaps behind the stainless liner where a normal sweep cannot reach it. We see this most often in older masonry chimneys inside Loop 410.
- Punctured or torn DuraFlex liners from aggressive cleaning. A previous sweep with a heavy wire brush can catch the corrugated wall of a 316Ti liner, especially in offset flues common to early 20th-century San Antonio bungalows. A small puncture is not cosmetic. It lets smoke and heat reach the masonry behind the liner, and it only gets worse.
- Detached ProFlex connectors at the appliance outlet. San Antonio’s quick winter cold snaps cause thermal expansion and contraction at the connection point. Over time, a ProFlex connector that was not seated properly works itself loose. We check these on every DuraFlex service call, even when the customer only called about a cleaning.
- Corroded Snap-Lock caps after heavy thunderstorms and hail. San Antonio’s spring storm season is hard on exposed metal. A rusted or punctured Snap-Lock cap lets water run down the liner and into the surrounding masonry, which degrades both. We routinely replace caps after hail events, particularly in neighborhoods with taller chimneys that take the full brunt of the wind.
- Creosote buildup accelerated by humid winter fires. San Antonio’s winter humidity means the fires we burn are often cooler and smokier than you would get in a dry climate. That translates to more creosote, faster. If a DuraFlex liner has not been swept in two or three humid winters, we are usually removing a lot of it.
DuraFlex Service in San Antonio: What Local Conditions Mean for Your Equipment
Here is something specific to San Antonio that most chimney companies will not tell you, because it is easier to just sell a liner replacement. In the historic neighborhoods like Monte Vista and King William, chimney swifts nest inside DuraFlex liners during spring and summer. These are protected migratory birds, and federal law means you cannot simply remove an active nest. If a homeowner has swifts in the flue, we work around the nesting season, document what we find, and install a properly fitted cap to prevent re-entry. A chimney sweep in a newer suburb like Stone Oak almost never deals with this because the housing stock is newer, the chimneys are shorter, and the flues are often prefab metal with different entry points. But if your home was built before 1950 inside Loop 410 and you hear chirping in the fireplace in May, you are probably not imagining it. You have swifts. And that changes how we approach the cleaning.
We pulled a DuraFlex 316Ti liner from a 1920s brick chimney on King William Street a few years back and found a three-inch tear near the first elbow where a previous sweep had dragged a heavy brush. After removing the liner, we discovered years of creosote packed behind it against the original clay tile, a direct result of San Antonio’s humid winter fires. We repointed the spalled brick, installed a new DuraFlex liner with a proper connector, and finished with a Snap-Lock cap to keep out swifts and rain.
DuraFlex Models & Products We Service in San Antonio
We clean, inspect, repair, and replace DuraFlex 316Ti and 304 stainless steel chimney liners, ProFlex connectors, and Snap-Lock caps. We stock the most common connector and cap sizes for faster turnaround on San Antonio jobs, and for older or discontinued DuraFlex parts we source stainless aftermarket equivalents that meet or exceed UL 1777 standards. If your liner is damaged, we tell you plainly whether a spot repair makes sense or whether the flue’s age and condition argue for full replacement. Sometimes the cheaper repair is the right call. Sometimes it is throwing money at a liner that has already failed. We will show you the camera footage so you can see it yourself before you spend a dollar.
See the difference
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AfterDuraFlex Service Pricing in San Antonio
A standard DuraFlex chimney cleaning in San Antonio typically runs $180 to $320, depending on flue height, creosote stage, and whether a swift nest has to be worked around. If we find liner damage, a Level 2 inspection with camera runs in the $150 to $300 range. Mortar repointing on a brick chimney starts around $45 per square foot. A full DuraFlex liner replacement, if needed, usually lands between $2,500 and $4,500, and we give you the written number before anything gets ordered. You will also get a written price for the sweep itself before we start. No surprises after the fact, ever. Call (903) 515-5079 for an exact quote on your flue.
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 – DuraFlex Chimney Cleaning in San Antonio
San Antonio’s humid subtropical climate shortens liner life in two ways. The heavy thunderstorms and hail corrode exposed components like the Snap-Lock cap, and the brief winter cold snaps plus intense summer heat cause thermal shock cracking in the original clay tile that surrounds many older DuraFlex installations. The stainless liner itself usually survives, but the masonry and connectors around it do not. A Chimney Inspection in San Antonio every two to three years catches this early. Call (903) 515-5079 to schedule one.
Not immediately, and not during nesting season. Chimney swifts are protected under federal law, so an active nest cannot be disturbed. We will inspect from the exterior, confirm what is happening, and schedule the cleaning around the nesting cycle. Once the birds leave, we remove the old nest material and install a proper cap to prevent re-entry. If you are hearing birds in your flue in San Antonio, call us and we will tell you exactly what the timeline looks like.
We do both, and we tell you which one actually makes sense. Small tears near the top of the liner can often be spot-repaired with a stainless patch and a proper connector. But a liner with multiple tears, heavy corrosion, or creosote packed behind it from years of clay tile spalling is usually a full replacement. We show you camera footage either way so the decision is yours and you can see the evidence with your own eyes. Call (903) 515-5079 and we will walk you through what we find.
The short answer is cracked clay tile. Once the original tile liner surrounding the DuraFlex system spalls due to freeze-thaw cycles, gaps open up. Creosote from San Antonio’s humid winter fires seeps through those gaps and accumulates behind the stainless liner where a normal sweep cannot reach it. That buildup becomes a hidden fire risk. This is exactly why we include a camera inspection whenever an older San Antonio chimney shows signs of masonry cracking.
Yes, with some cautions. Many of the post-war tract homes in suburbs like Windcrest and Boerne were built with prefab metal fireplaces that were never designed for a full masonry liner. Some can accept a properly sized DuraFlex liner; others cannot, because the flue is too small or the appliance is not listed for that configuration. We measure, we inspect, and we tell you honestly whether the installation is viable before we quote it. Call (903) 515-5079 for a free estimate.
Service Areas Near San Antonio
We provide DuraFlex service across San Antonio and the surrounding communities, including DuraFlex service in Schertz, DuraFlex service in Cibolo, Boerne, Alamo Heights, and Windcrest. If you are inside the metro area or just outside it, chances are we have worked a chimney on your street. You can also view our full San Antonio service area or learn more about our DuraFlex sales & service.
Book Your DuraFlex Service in San Antonio Today
We have written prices, background-checked technicians, and a live person who answers the phone around the clock. If you need DuraFlex chimney cleaning in San Antonio, call (903) 515-5079. We will schedule the visit, send you the technician’s name and photo before we arrive, and finish with a written guarantee on any repair we make.
Written by Ruben Castellano, Owner at Alcott Chimney San Antonio, serving San Antonio since 2002.