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 Austin Homeowners Choose DuraFlex Chimney Cleaning
We provide Duraflex repair in Austin and independent chimney cleaning service, and we’ve worked on these flexible aluminum liners for over two decades. What separates our DuraFlex work from a general chimney sweep is simple: we know how corrugated 316L and 304 alloy liners behave in Central Texas heat, humidity, and the occasional ice storm. Ashby Chimney Austin is not affiliated with or authorized by DuraFlex – we’re an independent service provider that happens to install, clean, and repair more of these liners than almost anyone else in the Austin area. If you need a DuraFlex liner swept, inspected, or repaired, call us at (254) 274-4486 and we’ll give you a written price before any work starts.
Here’s the thing most Austin homeowners don’t realize until they’re standing in a smoky living room: a DuraFlex liner is only as good as the installation and the maintenance behind it. The liner itself is quality material. The problems we fix week after week come from what happens around it – hardened creosote from oak fires, kinked sections from a rushed install, caps that rusted through and invited birds in. Nathan Corliss has been Chimney Sweeping and inspecting chimneys in Austin for well over a decade, and he’ll tell you the same thing he tells everyone from Tarrytown to Mueller: say the price first, explain the work, put the promise in writing.
Why Trust Ashby Chimney Austin for Your DuraFlex Chimney Cleaning?
Our technicians work on DuraFlex liners weekly across Austin’s masonry and prefab chimneys, including Duraflex repair in Round Rock. That matters because DuraFlex systems have quirks a generalist won’t catch. The corrugated walls of a DuraFlex AL 316L liner hold creosote differently than a smooth clay tile or a rigid stainless pipe. The seam overlaps on older DuraFlex 304 sections corrode in specific patterns when exposed to acidic condensate from high-efficiency gas appliances. A kinked section from a bad original install will eventually cause draft problems that mimic a dozen other issues. We can spot these because we’ve seen hundreds of them in Austin homes.
Nathan grew up in the San Fernando Valley and learned the trade hands-on through the building trades program at Los Angeles Trade-Technical College before relocating to Central Texas and building his crew. He’s known for being straight with people. If a DuraFlex liner is fine, he says so. If it needs attention, he explains it in plain language until it makes sense. Our work, including Duraflex in Georgetown, is backed by the 365-Day Done Right Promise: if a covered repair fails within the guarantee period, we return and correct it at no charge. That’s not a warranty you buy separately. It’s included with every repair we perform on DuraFlex systems in Austin, in writing.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Fix in Austin
These are the five most frequent DuraFlex-related callouts we get across Austin. If any of these sound familiar, call us before the next burn season:
- Glazed creosote on corrugated DuraFlex AL 316L walls. Austin’s hot, humid summers followed by sudden cold snaps mean fireplaces sit dormant for months, then get used hard for a few weeks. Any creosote left in the liner hardens into a glaze that brushes can’t remove. We use a rotary whip with a flexible nylon head that takes off the glaze without gouging the aluminum. Wet, unseasoned oak makes this worse, and we see a lot of it in older Austin neighborhoods where firewood gets stored outside in the humidity.
- Pinhole corrosion at seam overlaps on DuraFlex 304 sections. If you run a high-efficiency gas appliance through an older 304 liner, acidic condensate eats at the seam overlaps. The holes start small, often near the bottom connector. We catch them during inspections before they become draft failures or, worse, exhaust leaks into the home. This is an Austin-specific problem because of how many homes here converted from wood to gas in the 1980s and 90s without upgrading the liner.
- Kinked or crushed liner sections from failed original installation. When a liner is pulled through tight offsets without proper tees, it kinks. Sometimes the kink is visible only from the top. Kinked sections restrict draft, trap creosote, and can eventually crack along the corrugation ridges. We find these constantly in Austin’s older bungalows in Hyde Park and Travis Heights, where chimneys from the 1920s through 1960s have tight bends and single-wythe brick construction.
- Soot accumulation at the bottom connector where the DuraFlex liner meets the appliance flue collar. This is where smoke spillage starts. The connector gets blocked, draft backs up, and suddenly the living room fills with smoke every time you light a fire. It’s often mistaken for a flue blockage higher up. We pull the connector, clean it thoroughly, and check the liner above it with a camera before putting anything back together.
- Rusted-through caps letting birds and debris into the liner. Austin gets plenty of rain in spring and fall, and the cheap caps installed with many original DuraFlex systems rust through at the mesh. Birds drag nesting material in, and one spark turns that into a chimney fire. We replace rusted caps with proper DuraFlex rain caps. In the Mueller development, we also see prefab fireplaces with metal flues that warp in Austin’s heat, causing baffle misalignment – and a warped baffle is a repair, not a cleaning.
DuraFlex Parts & Our Repair-vs-Replace Approach
When a section of DuraFlex liner, connector, or cap must be replaced, we use DuraFlex OEM components. Generic aftermarket flex liners rarely match the corrugation pitch and diameter exactly, and a mismatched section creates draft turbulence and a weak point. We keep common DuraFlex AL 316L and 304 sections, connectors, and caps in local stock for fast turnaround across Austin. If we need something unusual, it’s usually here within a day or two.
Our rule on repair versus replace is plain: we replace when visible perforation, heavy corrosion, or mechanical kinking compromises the liner’s structural integrity or UL listing. We repair when the issue is isolated – a bad connector, a rusted cap, a small section of damage at the bottom. We’ll show you the camera footage. If the liner can safely serve another several seasons, we say so. We’re not going to sell you a full reline because of a $40 connector. Call (254) 274-4486 if you want an honest opinion backed by camera evidence.
Our DuraFlex Service Process – Step by Step
Here’s exactly how a DuraFlex cleaning or repair goes with us, from the phone call to the written guarantee:
- 1
Diagnosis. We start with a camera inspection of the full DuraFlex liner run. We’re looking for creosote stage, seam corrosion, kinks, connector blockage, and cap condition. You see the footage, not just our summary. Nathan or one of our senior techs walks you through what we found and what it means for your specific liner.
- 2
Repair or service. For cleaning, we run a rotary whip sized to your liner diameter – not a one-size-fits-all brush. For repairs, we pull the affected section, prep the connection points, and install OEM DuraFlex components that match the existing pitch and diameter.
- 3
Test. After any repair or cleaning, we check draft at the appliance, run a smoke test where appropriate, and re-inspect the connection points with the camera. If it doesn’t pass, we don’t pack up.
- 4
Warranty. Every repair gets a written guarantee. If a covered repair fails inside the guarantee period, we return and fix it at no charge. That’s the 365-Day Done Right Promise – part of the Kingswell Guarantee standard, not an add-on you pay for.
See the difference
Before
After
Before
After
Before
AfterDuraFlex Products We Service & Install in Austin
We work on the full DuraFlex product family: DuraFlex AL 316L, the standard liners we see in most Austin wood-burning fireplaces; DuraFlex 304, common on gas conversions and high-efficiency appliances; DuraFlex Pro, the heavier-gauge option on newer installs; and DuraFlex Smooth Wall, which accumulates less creosote and is easier to clean than the corrugated lines. We also commonly service and replace the associated components – top plates, rain caps, connectors, tees, and termination kits. We stock the most common AL 316L and 304 sections locally so we’re not waiting on a truck from out of state when your fireplace needs to work.
We Also Service These Brands
DuraFlex isn’t the only liner system in Austin. We carry and service HeatShield, which resurfacing older fireclay flues, and Gelco, another flexible liner brand we see in older installs. Our techs are trained on all three, and we’ll recommend the system that fits your chimney and appliance rather than the one we happen to stock. That’s the benefit of working with a multi-brand shop.
FAQs – DuraFlex Chimney Cleaning Service in Austin
No. Ashby Chimney Austin is an independent service provider. We are not affiliated with, authorized by, or endorsed by DuraFlex. We choose to work on DuraFlex products because they’re common in Austin homes and we know them thoroughly. The parts we install are genuine OEM DuraFlex components, but the company behind the work is us, backed by our own written guarantee.
Yes. When a section of liner, connector, or cap must be replaced, we use DuraFlex OEM components. We don’t substitute generic flex liner because the corrugation pitch and diameter rarely match, and a mismatch compromises draft and structural integrity. If an OEM part isn’t available locally, we’ll tell you before we start and give you the option to wait rather than install something second-rate.
A standard DuraFlex cleaning and inspection on an Austin home takes about 60 to 90 minutes. Repairs vary depending on what we find. A cap replacement might take 30 minutes. A section replacement at the bottom connector could take two to three hours. We schedule a real arrival window and give you a written price before work begins, so you’re not waiting around wondering.
We service and install DuraFlex AL 316L, DuraFlex 304, DuraFlex Pro, and DuraFlex Smooth Wall. That covers the vast majority of DuraFlex residential liners installed in Austin. If you have an older or unusual DuraFlex product, call us at (254) 274-4486 and we’ll identify what you have and whether we can help.
No. Proper cleaning and maintenance using OEM components will not void a DuraFlex warranty. In fact, skipping annual sweeps is a far bigger risk to your liner’s lifespan. What will void a warranty is using a generic aftermarket section that doesn’t match the original specs, or letting a kink or corrosion issue go unaddressed until the liner fails. We document every repair with camera footage, which gives you a record if a manufacturer claim ever comes up.
Most DuraFlex chimney cleanings in Austin run between $180 and $340 depending on liner length, creosote stage, and whether significant glazing requires rotary treatment. A cap replacement typically adds $90 to $180 including the OEM DuraFlex cap. Every job gets a written price before any work starts, and the number on the invoice matches the number we quoted at the door. Call (254) 274-4486 for an exact quote – estimates are free.
Yes. Glazed creosote is the most common issue we see on DuraFlex AL liners in Austin, especially in homes that burn unseasoned oak. We use a rotary whip with flexible nylon heads sized to your liner diameter, which removes the glaze without gouging the aluminum. We do not use steel scrapers or chains on aluminum liners. If the glaze is severe, we’ll do a second pass and re-inspect with the camera to confirm the walls are clean before we call the job done.
A DuraFlex AL 316L liner used lightly in Austin can last 20 years or more if it’s kept clean and the cap stays intact. The bigger risk in Austin is what happens during the long dormant stretches. Creosote hardens, moisture collects, and small problems become big ones between seasons. We recommend an annual inspection even if you only light a fire three or four nights a year. It’s cheaper than replacing a liner, and it stops the slow failures that catch people off guard in early December.
Not usually. Small holes near the bottom connector are often isolated – caused by years of heat and moisture at the weakest point. If the rest of the liner is in good shape, we can often replace just that bottom section with an OEM DuraFlex section and connect it properly. If the corrosion is widespread or the liner is kinked higher up, replacement may be the right call. We’ll show you the camera footage before we recommend anything. Call (254) 274-4486 and we’ll take a look.
It depends on the liner’s alloy and condition. DuraFlex 304 is designed for gas appliances and handles condensate better than AL 316L. But many wood-burning liners in Austin are AL, and converting to gas without checking the liner’s condition can lead to corrosion and leaks. We’ll inspect the liner, confirm what it’s rated for, and tell you honestly whether you need a new liner or a different grade. Don’t make the swap blind.
Yes. The top plate must be sized to your flue’s inside and outside diameter, and the cap should match the liner’s OD. A generic cap can restrict draft or let in water. We stock DuraFlex rain caps and top plates in common sizes for Austin homes, and we’ll match what’s there rather than rig something that half-fits. A $25 universal cap is a false economy if it rusts through in two seasons and lets birds in – we see that failure constantly.
Book Your DuraFlex Service in Austin, TX
Call (254) 274-4486 for a free estimate on DuraFlex cleaning, inspection, or repair in Austin. We answer live, 24/7. You’ll get a written price before any work starts, a real arrival window, and a written guarantee on completion. That’s the Kingswell Way: say the price, show up, leave it cleaner, put it in writing, come back if it fails.
Written by Nathan Corliss, Owner at Ashby Chimney Austin, serving Austin since 2002.