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 Marietta Homeowners Choose DuraFlex Chimney Cleaning
We provide independent DuraFlex in Marietta chimney cleaning, repair, and refinishing service throughout Marietta, GA, and we’ve worked hands-on with these liners long enough to know exactly where they fail and why. Most chimney sweeps can run a brush through a flue. What separates our DuraFlex work is that we inspect the liner wall, the crimp collars, the offsets, and the appliance connection, then show you photos of anything we find before we recommend a repair. Call (478) 796-8742 for a straight answer and a written price before any work begins.
Ashby Chimney Marietta is an independent DuraFlex service provider. We are not affiliated with nor authorized by DuraFlex, and we won’t pretend otherwise. What we are is a local crew that has pulled, cleaned, patched, and reinstalled enough DuraFlex liners in Cobb County homes to know the difference between a liner that needs forty minutes of rotary cleaning and one that needs to come out. Nathan Corliss, our owner, learned the trade at Los Angeles Trade-Technical College and has spent nearly twenty-two years on roofs and inside flues. He writes every quote himself, and he won’t sell you a liner you don’t need.
Why Trust Ashby Chimney Marietta for Your DuraFlex Chimney Cleaning?
DuraFlex liners are well made, but they live inside chimneys, and Marietta chimneys are hard on metal. Humid air pushes moisture through brick, condensation forms inside the flue, and creosote builds on the corrugated walls faster than a homeowner expects. A sweep who doesn’t know DuraFlex’s specific weak points will miss early-stage damage. We don’t, because we see these liners every week.
Our technicians recognize the difference between a 316L flexible liner and a Pro 316L smooth-wall, between a proper appliance connector and a homeowner-installed adapter that was never going to hold. When we open a cleanout door or pull a cap, we’re looking at crimp alignment, seam tightness, and wall thickness, not just running a brush up and calling it done. Nathan’s crew has worked houses near Kennesaw Mountain, off Roswell Road, and throughout the older neighborhoods around the Marietta Square, offering Duraflex service in Kennesaw and beyond. The older houses are where we earn our keep: offset clay flues, unlined sections, and liners that were installed twenty years ago and never touched again. We quote a flat price before we touch a brush, and every repair goes in writing under the Kingswell Guarantee. If it fails inside the guarantee period, we return at no charge.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Fix in Marietta
- Liner seam separation at the appliance connector. DuraFlex 316L and Pro 316L liners expand and contract with every fire. Over years of thermal cycling, the crimp collar at the appliance connector can work loose, especially when the original install used a clamp that wasn’t sized correctly. The appliance then vents partially into the chase instead of up the flue. We realign the collar, replace the clamp with exact-spec hardware, and test the draft before we leave.
- Creosote accumulation at the first offset bend. The corrugated inner wall of a DuraFlex 316L flexible liner catches smoke particulates at the first offset, where draft velocity drops and the flue gases cool. Marietta’s pattern of low, smoky fires during our short winter cold snaps makes this worse, the fires never get hot enough to burn the creosote off. We remove Stage 1 and Stage 2 glaze with rotary whips sized to the liner diameter, never steel scrapers that would gouge the corrugations.
- Crushed or ovalized liner section after a chimney fire or masonry shift. If a chimney fire happens, or if the masonry settles, a flexible liner can ovalize inside the clay tile. Once the cross-section is compressed, the liner no longer drafts correctly and can trap CO. We map the damage with a camera, show you the video, and replace only the failed section when the rest of the liner wall still measures within spec.
- Moisture wicking behind the insulation wrap. DuraFlex liners installed with insulation wrap can trap condensation between the wrap and the liner wall. Over several humid Georgia summers, that moisture corrodes the outer surface and produces acidic condensate at the base. We find this often in Marietta chimneys that were insulated for high-temperature performance but never had the top plate sealed correctly. The fix starts with the cap and flashing, not the liner.
- Corrosion and pinhole leaks in aluminum gas liners. DuraFlex aluminum liners are rated for gas appliances only, but builder-grade installs from the 1990s and 2000s often used undersized or poorly supported sections. Condensation from high-efficiency gas units pools at the low point and eats through the aluminum. We flag pinholing during inspection and replace the affected section with correct-spec flex rather than slapping sealant over a hole.
DuraFlex Parts & Our Repair-vs-Replace Approach
We source genuine DuraFlex flex sections, connectors, tees, and caps through open distributor channels. We are not a factory store, and we don’t claim to be. For clamps and sealant, we use OEM or exact-spec aftermarket parts when the liner wall shows measurable thinning, but we will not put an aftermarket patch on a liner with compromised structure just to make a sale cheaper. A liner with more than two failed sections, or visible pinholing in the first 15 feet, gets replaced, not patched. Patching a liner that’s already failing in three places is how you end up with the same problem six weeks later, which is exactly the kind of thing our guarantee exists to prevent. If you’re not sure whether your DuraFlex liner needs a section replaced or a full re-line, call (478) 796-8742 and we’ll put eyes on it.
Our DuraFlex Service Process – Step by Step
- 1
Inspection and diagnosis. We camera-scan the full liner from top and bottom, measure wall thickness at three points, and check the appliance connector and cap. You see the photos. If the liner is within spec, we tell you that plainly and move to cleaning.
- 2
Cleaning or repair, priced before work starts. For cleaning, we run rotary whips matched to the liner diameter and material, 316L, 304L hi-temp, or aluminum, never a one-size-fits-all brush on a corrugated surface it wasn’t designed for. For repairs, we quote the exact section, connector, tee, or cap and a written number before we turn a single screw.
- 3
Replacement or reinstallation where needed. When a section is crushed or pinhole-corroded, we remove and replace only that section when the remaining liner measures sound. We use DuraFlex flex sections and top plates that match the original install, and we re-support the liner correctly at each offset.
- 4
Draft testing and verification. We don’t call a liner fixed because it looks right. We run a draft test, verify the appliance is exhausting correctly up the flue, and check for any bypass at the connector. Then we clean the firebox, leave the hearth cleaner than we found it, and put the guarantee in writing.
See the difference
Before
After
Before
After
Before
AfterDuraFlex Products We Service & Install in Marietta
We work on the full line: DuraFlex 316L Flexible Chimney Liner for wood and pellet, Pro 316L Smooth-Wall Liner where draft and cleanout matter, 304L Hi-Temp Liner for wood and oil appliances, and DuraFlex Aluminum Liner approved for gas. We stock flex sections, connectors, top plates, and caps for most common diameters so a typical section replacement doesn’t mean a two-week wait for parts. In Marietta’s older houses with offset clay flues, we also install new DuraFlex liners where the original clay has cracked or is unlined, sized and insulated for the actual appliance, not a guess, with Chimney Sweep precision.
We Also Service These Brands
DuraFlex is one of the liners we work with most, but it’s not the only one. We service and install HeatShield and Gelco systems, along with Olympia Chimney, Famco, and Copperfield components. If your chimney has a different liner brand or a ceramic system, we’ll quote it the same way: written price, real photos, guarantee in writing.
FAQs – DuraFlex Chimney Cleaning Service in Marietta
No. We are an independent DuraFlex service provider, not an authorized dealer or warranty representative. That means warranty claims go through DuraFlex directly, and we’ll help you document the work properly. What it doesn’t mean is that we’re guessing. Our crew services these liners every week in Marietta and knows the product lines well enough to spot problems a generic sweep would miss.
Yes, for liner sections, connectors, tees, and caps we source genuine DuraFlex components through open distributor channels. For clamps and sealant, we use OEM or exact-spec aftermarket parts, never whatever happens to be in the van. If your liner needs a section replaced, we’ll show you the part number and the distributor invoice if you want to see it.
A standard cleaning on a DuraFlex liner takes one to two hours, depending on creosote stage and liner length. A section replacement or cap and top plate job usually runs half a day. We’ll give you a real arrival window before the appointment, and we call if anything changes. No waiting on a four-hour block with no update.
We cover DuraFlex 316L Flexible, Pro 316L Smooth-Wall, 304L Hi-Temp, and Aluminum Gas liners. If your liner is a DuraFlex product and you’re not sure which series it is, we can identify it during the inspection and tell you whether it’s approved for your appliance, because that matters more than most people think. A 316L liner on a gas appliance can be wrong in both directions.
Cleaning and inspecting your liner never voids a manufacturer warranty. What can void a warranty is using the wrong brush type, an incorrectly sized scraper, or a patch that was never intended for the product. We match our cleaning method to the exact liner material and diameter, and we document everything with photos. If you have an active warranty claim, we’ll provide the inspection report and images you need to file it.
Most DuraFlex chimney cleanings in Marietta run between $175 and $300 depending on liner length, creosote stage, and whether the cap and top plate need attention. A section replacement, new cap, or connector repair is quoted separately after we camera-scan and see exactly what’s there. You get a written price before any work starts, and the number on the invoice matches the quote at the door. Call (478) 796-8742 for an exact quote, estimates are free.
Book Your DuraFlex Service in Marietta, GA
Tell you the price first, show you the work, put it in writing, that’s the whole job. If your DuraFlex liner needs cleaning, repair, or a straight answer about whether it’s safe to burn, call (478) 796-8742. A live person answers, 24 hours a day.
Written by Nathan Corliss, Owner at Ashby Chimney Marietta, serving Marietta, GA since 2002.