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 Cibolo, TX | Alcott Chimney San Antonio
A DuraFlex chimney cleaning in Cibolo typically runs $189 – $279 for a standard sweep, and most jobs wrap up in under two hours. We’re an independent DuraFlex service provider, not a manufacturer-authorized shop, which means we can tell you plainly when a liner needs real work and when it just needs a good cleaning. The difference here in Cibolo is the housing mix: new builds with prefab flues sit three streets over from 1980s brick homes where original clay tiles have cracked and a DuraFlex liner was retrofitted years ago. Those older liners need a specific kind of attention. Call (903) 515-5079 to book yours.
Why Cibolo Residents Choose Us for DuraFlex Service
DuraFlex liners are the most common retrofit liner we see in Cibolo’s older subdivisions, and that hands-on repetition matters. Ruben Castellano, our owner, came up through the building and construction program at Los Angeles Trade-Technical College and has spent well over a decade pulling creosote out of DuraFlex liners across South Texas. He teaches every tech the same thing: a DuraFlex liner is only as good as the chimney around it. That’s why we don’t just rod the flue and call it done when you hire us for a Chimney Sweep - Cibolo. We check the cap, the support brackets, the insulation wrap if there is one, and the smoke chamber underneath. A lot of Cibolo homes in Deer Creek and Buffalo Crossing have original fireplaces that never drafted well to begin with. The liner might be fine. The chamber below it usually isn’t. We write down what we find and hand you a price before any repair, every time.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Solve in Cibolo
- Hardened creosote in corrugated liner walls. Cibolo winters are mild, so fires burn low and slow. That produces sticky creosote that bakes onto the corrugated ridges of a DuraFlex liner, then hardens during months of disuse. A standard brush often skims the surface. We use rotary mechanical tools to break it down without gouging the liner.
- Surface rust from summer humidity without a proper cap. Stainless steel resists rust, not repels it. Cibolo’s humid summers put a film of moisture on uncapped chimneys, and over a few seasons that turns to light surface corrosion on the liner crown. We see it most on older homes along Main Street where original caps went missing decades ago. The fix is usually a proper rain cap plus a cleaning, not a new liner.
- Condensation and creosote adhesion in uninsulated liners. A DuraFlex liner installed without an insulation wrap runs cold. Hot exhaust hits cold steel, moisture condenses, and creosote sticks to the wet walls like tar. This is common in 1990s-era Cibolo homes where the liner was added as a quick fix without insulation. Sometimes cleaning restores it. Sometimes the corrosion pattern says replacement is the honest call.
- Sagging or shifted liners in chimneys without clay tiles. If the original masonry chimney lost its clay flue tiles, a DuraFlex liner can shift or sag over time. Gaps open up where smoke and carbon monoxide can push into the house. We check for this on every Level 2 inspection in Cibolo, especially in older subdivisions with original fireplaces that predate modern liner standards.
- Smoke blowback from undersized smoke chambers beneath the liner. This one surprises people. The liner can be perfectly clean and the fireplace still smokes the living room. The problem is the chamber below it. In Cibolo’s Deer Creek subdivision especially, many original fireplaces were built with shallow, poorly sloped smoke chambers. We diagnose this before anyone quotes a liner replacement, because putting a new liner on a bad chamber doesn’t fix anything.
DuraFlex Service in Cibolo: What Local Conditions Mean for Your Equipment
Here’s something specific to Cibolo that won’t show up on a generic DuraFlex page. The housing stock here is split clean in two. East of Main Street you’ll find newer subdivisions with prefabricated metal chimneys that rarely need more than a light brush. West and along the older corridors, you have brick and stone homes from the 1980s through early 2000s where masonry chimneys were built without modern liners or with undersized smoke chambers. When a homeowner in those older neighborhoods installs a DuraFlex liner, the liner becomes the chimney’s only real flue surface. There’s no clay tile behind it doing backup work. That means everything the liner carries, creosote, moisture, heat stress, lands on the liner alone. In a city like Cibolo where chimney use is strictly seasonal, that liner sits idle for eight to nine months a year. Creosote hardens. Moisture lingers. The liner sees cycling that a year-round-used fireplace in a colder city never puts it through. Cleaning a DuraFlex liner in Cibolo is less about the soot and more about what the idle months did to the buildup. That is the part we plan for on every job.
In a 1990s brick home off Buffalo Crossing, our crew found a DuraFlex 316L liner coated in rock-hard creosote after years of exactly that kind of seasonal use. We performed mechanical creosote removal, then a Level 2 inspection revealed the liner had pulled away from the clay flue tiles near the top. We resecured and insulated the liner, eliminating the smoke smell that had plagued the family every winter. That job never needed a new liner. It needed someone who knew what an idle Texas chimney does to a liner over ten years.
DuraFlex Models & Products We Service in Cibolo
We clean, inspect, and repair the full DuraFlex line common in Cibolo homes: the 316L stainless liner, the AL 29-4C alloy liner for high-efficiency gas appliances, the Pro Connect system, and Smooth Wall liners. For most repairs we use OEM DuraFlex components so fit and warranty stay intact. For non-structural parts like caps, connectors, or top plates, we’ll use a quality aftermarket equivalent if it matches the liner’s diameter and material and actually saves you money. We stock common DuraFlex connectors, caps, and insulation kits locally for faster turnaround on Cibolo jobs. You can also see what we carry via DuraFlex sales & service.
See the difference
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AfterDuraFlex Service Pricing in Cibolo
A standard DuraFlex chimney cleaning in Cibolo runs $189 – $279 depending on liner condition, creosote stage, and whether the fireplace or stove has been used heavily. A Level 2 camera inspection, which we recommend for any liner with hardened creosote or suspected shifting, typically runs $299 – $499. Chimney rebuilding or major liner replacement starts higher and is quoted only after we show you camera footage and explain exactly what we saw. You get a written price before any work begins. Always. That’s not an upgrade or a promise, it’s how we operate since 2002. Call (903) 515-5079 for an exact quote on your Cibolo chimney, estimates are free.
Serving Cibolo, TX - Our Local Coverage Area
We’re based in the Cibolo 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 Cibolo
Stainless steel resists rust but does not repel it. Cibolo’s humid summers push moisture down an uncapped chimney, and that moisture sits on the liner crown. Over several seasons, the surface oxidizes. A missing or broken rain cap is almost always the cause we find. The fix is a proper cap plus a cleaning. Call (903) 515-5079 and we’ll check it for you.
Yes. Low, smoldering fires common in Cibolo’s mild winters create thick, sticky creosote that hardens when the fireplace sits unused. We use mechanical rotary tools to break down hardened deposits without damaging the liner wall. If accumulation is too advanced for safe cleaning, we’ll tell you and show you the camera footage before recommending replacement.
No. This is a mistake we see quoted by less experienced sweeps all over Cibolo. A new liner sits above the smoke chamber. If the chamber below is undersized or badly sloped, which many Deer Creek originals are, the blowback continues. We check the chamber before any liner recommendation. Sometimes the fix is chamber repair, sometimes it’s a liner replacement too. But you deserve to know which one is actually broken before you pay for anything. Call (903) 515-5079 for a straight answer.
Every year. That’s the National Fire Protection Association standard, and Cibolo’s seasonal use pattern doesn’t reduce the need, it changes it. Infrequent use means creosote has months to harden between fires. An annual Chimney Inspection in Cibolo catches buildup while it’s still removable. Any liner that has gone more than two years without a cleaning should have a Level 2 camera inspection before its next fire.
Yes. We handle chimney rebuilding, from firebox repair to full exterior masonry work, and we install the new DuraFlex liner as part of the same project. That saves you a second mobilization and keeps the liner sizing matched to the rebuilt flue. We’ll give you one written price for the entire scope before any work starts.
Service Areas Near Cibolo
We serve Cibolo and the surrounding communities throughout Greater San Antonio. You’ll find our crews regularly working in Schertz, San Antonio proper, Boerne, Alamo Heights, and Windcrest. For specific coverage details, see Cibolo service area. If you’re a bit further out, we also provide DuraFlex service in San Antonio and DuraFlex service in Schertz.
Book Your DuraFlex Service in Cibolo Today
A clean DuraFlex liner is a safety item, not a luxury. If it’s been more than a year since your last sweep, or you’re noticing smoke smells or poor drafting, let’s get you on the schedule. Call (903) 515-5079 for a free estimate. You’ll know your technician’s name and see their photo before we arrive.
Written by Ruben Castellano, Owner at Alcott Chimney San Antonio, serving Cibolo since 2002.