Gas fireplace service
Sweep & inspection
Caps & crowns
Flue relining
Masonry repairLevel 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.
Why San Antonio Homeowners Choose DuraFlex Chimney Cleaning
We provide independent San Antonio Duraflex service and liner service throughout the area, and we’ve been doing it long enough to know exactly where these systems fail in our local chimneys. Our technicians inspect and clean DuraFlex 316L and AL 29-4C flexible liners weekly, and we document what we find with photos before any work begins. We are not affiliated with or authorized by DuraFlex. We’re an independent service provider, which means we tell you what your liner actually needs, not what a manufacturer’s script says.
What separates our DuraFlex work in San Antonio is the data behind it. After hundreds of local liner inspections, we know that San Antonio’s clay-rich soils shift foundations enough to misalign tee bodies, and that our humid Gulf air accelerates corrosion on liner components that would last longer in drier climates. If you own a DuraFlex system, call (254) 276-4116 and you’ll get a live person who can book your inspection and answer questions about your liner.
Why Trust Hadley Chimney San Antonio for Your DuraFlex Chimney Cleaning?
Cory Mitchell, the owner of Hadley Chimney San Antonio, learned his trade foundations at Los Angeles Trade-Technical College and has spent nearly two decades working on chimneys across the Southwest. When he started this company, he made a simple decision: every customer gets photos of their chimney before they’re asked to spend a dollar. That principle drives how we handle DuraFlex systems specifically, because a flexible liner hides its problems in corrugations and seams where a visual exterior inspection tells you nothing.
We clean and inspect DuraFlex liners the way they need to be handled, not with brute force. A rotary whip with poly lines breaks up glazed creosote without tearing the thin stainless interior. We check the pop-rivet collars at masonry thimbles, the top plate clamp tension, and the tee body snout alignment, because these are the exact points where DuraFlex systems fail in San Antonio. We carry OEM DuraFlex termination caps, top plates, and rain collars. For liner sections that need full replacement, we specify UL 1777 compliant 316L or AL 29-4C equivalent material instead of whatever happens to be on the truck. Every repair comes with a 365-Day Done Right Promise: a written guarantee and a free second visit if the repair fails. That’s not a promotion. It’s how we’ve operated since 2003.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Fix in San Antonio
Here’s what we actually see when we open up DuraFlex systems in San Antonio homes. These are not generic chimney issues. They’re specific to how these liners are built and how they respond to our local climate and burning habits.
- Concentric corrugation inversion at the top plate. Over-tightened top plate clamps crush the corrugations near the termination, restricting the cross-sectional area where exhaust exits. We see this on DuraFlex 316L liners in homes throughout San Antonio, and it causes poor draft that homeowners often misdiagnose as a dirty flue. The fix is releasing the clamp, inspecting for permanent deformation, and resetting torque to specification. If the liner is permanently crushed, a short replacement section with a proper connector is the honest repair.
- Seam slip at the pop-rivet collar. Where a DuraFlex liner enters a masonry thimble, the pop-rivet collar is a common failure point. Rivets work loose over years of heating and cooling cycles, and flue gas bleeds into the chase. In older San Antonio homes, we find this on liners that were installed when the house was built and never re-inspected. We replace the collar with an OEM DuraFlex rain collar and stainless rivets, then document the repair with photos.
- Work-hardened circumferential cracking at the appliance connector offset. When a wood stove insert gets pushed back into place for cleaning, the flexible connector offset takes repeated bending stress. Over time, the stainless work-hardens and develops circumferential cracks. This is most common on DuraFlex Pro liner systems connected to inserts in San Antonio’s older central neighborhoods like Monte Vista, where homeowners burn occasionally and the connector gets stressed during each cleaning cycle.
- Tee-body snout misalignment after foundation settling. San Antonio’s high water table and expansive clay soils cause foundation movement that shifts masonry chimneys. When the chimney settles even slightly, the tee body snout at the base of a DuraFlex liner can misalign, causing condensation to pool inside the liner. That pooled moisture accelerates corrosion and creates a smell that homeowners notice before they see any visible damage. We realign the tee body when possible and replace it when the snout has deformed.
- Glazed creosote fused into corrugations. San Antonio’s climate means fireplaces often get used for short, low-temperature fires on rare cool evenings. Those fires produce creosote that condenses and hardens inside the corrugated interior of a DuraFlex liner. On a 316L liner, that glaze requires a rotary cleaning head with poly lines, because steel cable heads will score and tear the thin stainless. We’ve pulled liners in Alamo Heights with 3/8-inch of glazed creosote fused into the upper corrugations from years of exactly this burning pattern.
DuraFlex Parts & Our Repair-vs-Replace Approach
We stock DuraFlex-specific OEM termination caps, top plates, and rain collars locally, which means we can usually complete a component repair in a single visit. For flexible liner sections, we’re honest about when a patch kit is a stopgap and when a full pull is the right call. A patch kit fixes a localized problem. It does not fix a liner that has work-hardened cracks at multiple points or corrugation inversion along a significant length. When a full replacement is needed, we specify UL 1777 compliant 316L stainless or AL 29-4C equivalent material rather than whatever is cheapest. That keeps the repair code-compliant and durable without paying a markup for a manufacturer name on the box. See the problem, understand the fix, then decide. That’s how it should work. Call (254) 276-4116 and we’ll walk you through what your liner actually needs.
Our DuraFlex Service Process – Step by Step
- 1
Diagnosis with camera documentation. We run a camera through the full length of your DuraFlex liner and photograph every seam, the tee body, the top plate area, and the appliance connector. You see those photos before we recommend anything. No verbal mystery diagnosis.
- 2
Written quote before work starts. After the camera inspection, we give you a written price. Not a verbal estimate that changes when the tech gets on the roof. The price you see is the price you pay.
- 3
Cleaning or repair with DuraFlex-specific methods. For cleaning, we use rotary poly-line heads that remove glazed creosote without damaging the corrugated interior. For repairs, we use OEM DuraFlex components where they matter most: termination caps, rain collars, top plates, rivets, and tee bodies.
- 4
Draft testing and photo verification. After service, we re-test draft with a cold test when the situation calls for it, and we photograph the completed work inside the liner and at every repair point. You get those photos in your digital invoice.
- 5
365-Day Done Right Promise. Every repair carries a written guarantee. If it fails within 365 days, we return and fix it free. That’s covered, not an add-on.
See the difference
Before
After
Before
After
Before
AfterDuraFlex Products We Service & Install in San Antonio
We service and install the full range of DuraFlex liner systems commonly found in San Antonio homes. That includes the DuraFlex 316L flexible stainless steel liner for wood-burning fireplaces and stoves, the DuraFlex AL 29-4C flexible liner for high-efficiency gas appliances, and the DuraFlex Pro liner system for larger or more demanding installations. We also work with the DuraFlex Hybrid oval-to-round connector when a rectangular clay flue needs adaptation to a round liner. We stock OEM termination components locally for fast turnaround, and we maintain a working knowledge of every failure point these systems exhibit in our climate. If you’re not sure which liner is in your chimney, the camera inspection will tell us, and we’ll show you the photos.
We Also Service These Brands
While this page focuses on DuraFlex, we’re not a single-brand shop. We also service and install HeatShield ceramic repair compound systems and Gelco chimney products. That matters when a San Antonio homeowner needs an honest recommendation across multiple material options rather than a pitch for whatever one brand is being pushed that season.
FAQs – DuraFlex Chimney Cleaning Service in San Antonio
No. We are an independent DuraFlex service provider. We are not affiliated with, endorsed by, or authorized by DuraFlex or its parent company. What that means in practice: we recommend repairs based on what your liner actually needs, not on a manufacturer’s guidelines about when to replace. Our independence is the point.
Yes, for components where the OEM part matters. We stock and install DuraFlex termination caps, top plates, rain collars, and factory rivets. For flexible liner sections that require full replacement, we specify UL 1777 compliant 316L or AL 29-4C equivalent material. The alloy and compliance matter more than the branding on the box.
A standard DuraFlex inspection with camera documentation and cleaning typically takes 90 minutes to two hours. A component repair like a pop-rivet collar or top plate replacement usually completes in one visit. A full liner pull and replacement is a half-day to full-day job depending on chimney height and access. We give you a written time window when you book, and you’ll get live arrival tracking through The Relay Visibility Guarantee.
We service the DuraFlex 316L flexible stainless liner, the AL 29-4C liner for high-efficiency gas, the Pro liner system, and the Hybrid oval-to-round connector. If you have an older DuraFlex installation without documentation, the camera inspection will identify the liner type by its construction and alloy markings.
Cleaning with poly-line rotary heads does not void a DuraFlex warranty when done properly. Using steel cable heads on a corrugated stainless liner will damage it and could void warranty coverage, which is why we don’t use them. For repairs, using non-OEM components in certain positions could affect warranty terms, so we use OEM parts where the manufacturer specifies them. If your warranty is active, we’ll document everything with photos so you can submit a claim if needed.
DuraFlex chimney cleaning in San Antonio typically runs $225 to $395 for a standard inspection and cleaning, depending on liner length, access, and creosote condition. Component repairs like a rain collar or pop-rivet replacement add $150 to $500 depending on what’s needed. A full liner replacement typically falls between $1,800 and $3,800 in San Antonio. Call (254) 276-4116 for an exact written quote after our camera inspection, and you’ll see the photos that justify every dollar.
Yes, using the right method. We run a rotary whip with poly lines to break up glazed creosote that’s fused into the corrugations. Poly lines are non-abrasive to the stainless interior, unlike steel cable heads which score and tear the thin 316L or AL 29-4C material. The process takes longer than a standard Chimney Sweep but preserves the liner’s integrity, and we document the before and after with camera photos.
We run a camera through the full liner length from the top or through the appliance opening, depending on access. The camera captures every seam, the pop-rivet collars, the tee body, and the top plate area. You see those images in real time or immediately after the inspection. That’s the Relay Visibility Guarantee in action: you’re not paying for a verbal report, you’re paying for documented evidence of what’s inside your chimney.
With occasional low-temperature wood burning and proper annual cleaning, a DuraFlex 316L liner in San Antonio typically lasts 15 to 25 years. The wildcards are moisture and creosote glaze. Our humid climate and wind-driven rain accelerate corrosion at fittings if caps or rain collars are damaged. Glazed creosote from low-temperature fires traps moisture against the stainless and shortens liner life. Annual inspection catches both problems before they force a replacement.
In most cases, yes, the tee body can be replaced as a standalone component if the liner itself is still sound. We assess the tee body snout for misalignment from foundation settling, check for condensation pooling, and photograph the connection points. If the liner above the tee is in good condition, a component replacement is the honest repair. If the liner has work-hardened cracks or significant corrosion, we’ll show you the photos and recommend a full pull.
Most likely, the top plate clamp was loosened or the rain collar shifted during cleaning, and wind is vibrating the loose metal against the liner. Sometimes the termination cap itself has a loose spark arrestor screen. We check and resecure the top plate, reset the rain collar, and tighten the cap during a follow-up visit. If the rattling persists, the camera inspection will identify whether a liner seam near the top has separated and needs repair. Call (254) 276-4116 and we will diagnose it with photos.
Book Your DuraFlex Service in San Antonio, TX
If you own a DuraFlex liner in San Antonio, don’t wait for a draft problem or a smell to tell you something’s wrong. Call (254) 276-4116 today. A live person answers, we’ll book your inspection with a written time window, and you’ll get a written price and photos before any work starts.
Written by Cory Mitchell, Owner at Hadley Chimney San Antonio, serving San Antonio since 2003.