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 Schertz, TX | Alcott Chimney San Antonio
We provide independent DuraFlex Chimney Sweep in Schertz and service across Schertz, TX, for both masonry and prefab fireplaces. The thing that makes our DuraFlex work different here comes down to one word: humidity. Schertz sits right on the edge of the Balcones Escarpment, and homes along Cibolo Creek sit in localized moisture pockets that make uninsulated DuraFlex liners sweat, corrode, and fail faster than they would five miles west. That’s not brand marketing. That’s what we find when we scope liners in Ashley Place and Savannah Square.
Our techs have rebuilt DuraFlex sales & service liner systems on both masonry and prefab fireplaces across Schertz, and we know how the region’s freeze-thaw cycles and oak/cedar creosote interact with the corrugated alloy walls. We’re an independent service provider, not a manufacturer-affiliated shop, so the recommendation you get is based on what’s inside your flue, not a parts quota. Call (903) 515-5079 for a free estimate.
Why Schertz Residents Choose Us for DuraFlex Service
Ruben Castellano, our owner, learned the trade through the building and construction program at Los Angeles Trade-Technical College before spending years working chimneys across the Southwest. He and our crew have served San Antonio-area homeowners for well over a decade, and when it comes to DuraFlex, we’ve seen the full range: 304L liners in fine shape after fifteen years, and 316L liners pitted with pinholes after six because prior owners skipped the insulation wrap.
We stock genuine DuraFlex clamps, tees, storm collars, and liner sections locally, which means most Schertz service calls don’t stall out waiting on parts. We use OEM-compatible components when replacing liner sections, but we’re equally blunt when a liner is deformed from a chimney fire: patching a fried liner repeatedly costs more than one proper replacement. You’ll get a written price before any work begins, and every repair carries a written guarantee. If it fails, the second visit is free.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Solve in Schertz
- Cedar and oak creosote packed into corrugated inner walls. Schertz burns a lot of post oak and cedar, and both produce heavy, sticky creosote that settles into the corrugation crevices of DuraFlex 304L and 316L liners. A flat wire brush skims right over the ridges. We run poly brushes with a creosote solvent to break the glaze, then scope the liner to confirm the walls are actually clean.
- Freeze-thaw tears at flue joints. Schertz gets hard freezes a few times each winter, and the rapid warm-up afterward stresses the alloy at every seam. We regularly find hairline tears at the first offset where freeze-thaw expansion has worked the joint loose. Those tears leak flue gases into the chase, which is exactly what a Level 2 inspection is designed to catch.
- Condensation corrosion from skipped insulation wraps. A lot of DuraFlex installations from the 1990s and early 2000s were done without the insulation wrap, often by prior homeowners doing it themselves. Humid summer air drawn down the flue condenses on the cool alloy, and the condensation eats the liner at the first elbow. We see rust-stained drips at the cleanout door and know what’s happened before we even scope it.
- Sweating liners near Cibolo Creek. Homes along Cibolo Creek deal with humidity pockets that make uninsulated DuraFlex liners sweat even in mild weather. The moisture sits in the corrugations, accelerates corrosion, and eventually creates pinhole leaks that show up as rust-colored water in the firebox. Our sweep techs carry moisture meters on every Schertz call to flag early-stage corrosion before it becomes a pinhole.
- Glaze-level creosote after the first cold snap. Every year, the week after Thanksgiving, we get a wave of calls from Schertz homeowners who’ve fired up the fireplace for the first time since spring and noticed the damper is stuck or the smoke won’t draw. Often the preceding year’s creosote absorbed summer humidity, turned corrosive, and glazed the liner walls. That’s a solvent-and-brush job, not a quick vacuum.
DuraFlex Service in Schertz: What Local Conditions Mean for Your Equipment
Here’s the detail that most generic DuraFlex pages miss. Schertz sits on the Balcones Escarpment’s edge, which means homes along Cibolo Creek get localized humidity pockets during the long summer. An uninsulated DuraFlex 304L liner in, say, a 1980s ranch in Ashley Place will sweat from June through September as humid air is drawn down the flue and condenses on the metal. That moisture doesn’t just sit there; it mixes with leftover creosote from the previous winter’s oak fires and forms a mild acid that eats at the alloy from the inside out. By the time the homeowner sees rust-colored water in the firebox, the liner may already have pinhole leaks. Our sweeps carry moisture meters on every Schertz service call to flag this early, because a $200 liner inspection beats a $3,000 replacement. This is the only place you’ll read that specific explanation, because it’s the only honest way to describe what DuraFlex liners actually do in this part of Texas.
DuraFlex Models & Products We Service in Schertz
We service the full DuraFlex lineup you’re likely to find in Schertz homes: DuraFlex 304L, DuraFlex 316L, DuraFlex Pro, and complete DuraFlex liner kits. The 304L is the standard workhorse for most wood-burning fireplaces. The 316L adds molybdenum for better corrosion resistance, which matters in the humidity pockets near Cibolo Creek. The Pro line is built for high-temperature and higher-moisture environments, and we stock its connectors and couplers locally. When a liner section needs replacement, we use genuine DuraFlex components rather than generic aftermarket parts, because mixing non-OEM alloys with your existing liner can set up galvanic corrosion at the joint. That’s a trade detail most homeowners never hear.
See the difference
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AfterDuraFlex Service Pricing in Schertz
A standard DuraFlex chimney cleaning in Schertz typically runs $189 – $289 before any repairs, depending on the liner’s condition and how long it’s been since the last sweep. A Level 2 Chimney Inspection in Schertz with camera scoping adds $150 – $250 when it includes verifying every seam and corrugation. If we find a small tear or a corroded section that needs a genuine DuraFlex coupler, that repair usually lands between $125 and $400. If the liner is glazed with cedar creosote and needs solvent treatment, expect to add $75 – $150 on top of the base sweep. What drives the cost is the liner’s age, whether it was installed with the insulation wrap, and whether the previous owner’s teenage DIY installation left you with parts that don’t match. Every estimate is free, written down before work starts, and includes the full scope of what we’ll do. Call (903) 515-5079 for an exact quote on your chimney.
Serving Schertz, TX - Our Local Coverage Area
We’re based in the Schertz 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 Schertz
It depends on the liner’s alloy thickness and how badly the corrugations deformed. A hairline tear at a seam can sometimes be patched with a genuine DuraFlex coupler if the surrounding alloy is still sound. But if the liner shows visible warping or the corrugation ridges are flattened from extreme heat, patching is money wasted. After a chimney fire, we scope every seam before we recommend repair or replacement. If it’s borderline, I would rather give you a straight answer today than a vague promise you have to call us back about tomorrow. Call (903) 515-5079 and we’ll scope it.
Because Schertz’s humid summer air gets drawn down the flue and condenses on the cooler metal liner. If your liner was installed without the insulation wrap, the condensation sits in the corrugations and leaches iron from the alloy, which is what you’re seeing as rust-colored drip. Left long enough, that moisture mixes with creosote residue and accelerates corrosion. The fix is usually an insulation wrap retrofit, plus a waterproofing treatment on the exterior masonry. Call (903) 515-5079 for an assessment.
DuraFlex liners handle cedar fine, but cedar produces heavy, sticky creosote that clings to corrugated walls more aggressively than oak or mesquite. In Savannah Square and other Schertz neighborhoods where cedar gets burned regularly, the liner often needs solvent-assisted cleaning rather than a simple wire brush pass. The liner itself can last decades under cedar use as long as the creosote gets removed every year. The problems come when it doesn’t. Call (903) 515-5079 to schedule a cleaning before burning season.
With proper cleaning and a correctly installed insulation wrap, a DuraFlex 316L liner typically lasts 15 – 20 years in Schertz’s climate. The 304L usually runs 12 – 18 years, with the shorter life driven by our humid summers and a few hard freezes each winter. The variables that shorten that lifespan are skipped cleanings, creosote glaze from cedar, and the moisture cycling near Cibolo Creek. The liners we replace most often are the ones that never got swept. Call (903) 515-5079 for a liner condition assessment with camera scoping.
Often yes, especially if your clay flue has cracked from freeze-thaw cycling, which is common in Schertz. A DuraFlex liner adds a continuous metal barrier that seals flue gases away from the masonry, and it improves draft in older fireplaces. But the liner only works as well as the installation; the insulation wrap is not optional in our humidity, and we’ve repaired enough skipped-wrap installations to say that plainly. Call (903) 515-5079 and we’ll evaluate your existing flue before recommending anything.
Service Areas Near Schertz
Our DuraFlex team serves Schertz and the surrounding communities, including Schertz service area, DuraFlex service in Cibolo, and DuraFlex service in San Antonio. We also work in Boerne, Alamo Heights, and Windcrest, with the same written pricing and background-checked technicians on every job.
Book Your DuraFlex Service in Schertz Today
DuraFlex service in Schertz is a phone call away. We’ll schedule your sweep or inspection, send you the technician’s name and photo before we arrive, and put the price in writing before any work starts. Call (903) 515-5079 for a free estimate.
Written by Ruben Castellano, Owner at Alcott Chimney San Antonio, serving Schertz and the surrounding area since 2002.