Level 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.
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AfterDuraFlex Chimney Cleaning & Sweep in Greenwich: What to Know First
We clean and sweep DuraFlex chimney systems in Greenwich for a flat $229-$389, depending on flue height and creosote class. Most DuraFlex jobs are done same-visit with a camera inspection included, and you get a written price before we touch a brush. If you own a home in Greenwich with a DuraFlex liner or full-relining system, this page covers what actually goes wrong with those components, what a proper sweep costs, and when cleaning is enough versus when the liner needs replacing.
Call (516) 399-5497 to book a DuraFlex sweep or ask a question. Corrine Halstead leads the Greenwich crew, and we have worked on hundreds of DuraFlex systems across Fairfield County.
How DuraFlex Products Fail - and How We Fix Them
DuraFlex makes several liner families you’ll find in Greenwich homes: the 316L stainless Flex line, the Pro line with a smoother inner wall, the Hybrid 442 for higher-temperature appliances, and the DuraFlex AL aluminum liners used on older gas conversions. Each fails differently. Here’s what we see:
- 316L Flex corrugation creosote packing. On wood-burning fireplaces and stoves in Greenwich, the narrow corrugations in 316L Flex trap creosote faster than a smooth-wall liner. In backcountry Greenwich where oak burns hot and slow, we often find Class II glazing inside the corrugation valleys by year one. Our fix is a mechanical sweep with a poly brush sized to the liner ID, then a camera pass to confirm the corrugation valleys are clear. This is the most common DuraFlex issue we correct.
- Pro liner seam separation at the tee or elbow. The Pro series has smoother walls, but we have seen the seam welds at offset elbows loosen after repeated thermal cycling, especially on older installations near Cos Cob and Riverside where flues run through tight chases. The symptom is a faint metallic rattle during high wind, not a visible gap. We confirm with a camera, then either re-crimp the seam or quote a short section replacement, depending on what the footage shows. Written price before any work, as always.
- Hybrid 442 warping on oversized boiler vents. Greenwich homes with older oil-to-gas conversions sometimes have Hybrid 442 liners that were sized for the old oil boiler, not the new gas unit. The liner runs too cool, condensation collects, and the 442 alloy can ripple. That ripple catches soot and eventually restricts draft. We see this in mid-century colonials near Glenville. The sweep removes the soot, but the long-term fix is often a right-sized liner. We’ll tell you plainly whether the sweep buys you a season or whether it’s time to replace.
- AL aluminum liner pitting from acidic gas condensate. DuraFlex AL liners are rated for gas, but Greenwich’s humid summers mean more condensation cycles. Over 8 to 12 years, the aluminum can pit at the low points. During a sweep, we’ll camera the entire length and flag any pinholes before they leak flue gas into the chase. If the liner is intact, a cleaning is all you need. If not, we quote a replacement in writing and show you the footage.
- Improperly torqued clamps at the appliance collar. We did not install most of the DuraFlex liners we service, and we have caught loose or over-tightened hose clamps where the liner meets the stove collar. Over-tightening crushes the liner’s inner wall; under-tightening lets flue gas escape. During a sweep we check clamp torque with a calibrated tool, correct it, and photograph the final setting. This is a small fix that prevents a real carbon monoxide risk in Greenwich living spaces.
Our DuraFlex Chimney Cleaning & Sweep Process
A DuraFlex job runs on a set sequence, and you can watch the camera footage yourself when we’re done. Here’s how it goes from first call to final record:
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Call and written quote. You reach a live person at (516) 399-5497, answer a few questions about your fireplace or stove, and we send a written price before we schedule. No “we’ll see when we get there” pricing. Clause 1 of the Haven Standard: a written price, written scope, and written warranty before work starts.
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Arrival and setup. Our Greenwich tech arrives in uniform, drops floor protection throughout the work path, and does a quick visual check of the firebox and termination cap. You’ll get a text before we pull up, with the tech’s name.
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Camera pass, before. We run a Level 2 camera inspection (NFPA 211) down the full DuraFlex liner before touching a brush. This documents the creosote class, liner condition, seam integrity, and any blockages. You see the footage. We read it to you in plain terms.
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Mechanical sweep and detail work. We run a poly brush sized to your liner ID, then a follow-up pass with a whip or rotary head if the camera showed glazed creosote. Smoke chamber and firebox get hand-cleaned. All soot and creosote is bagged and removed from the property.
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Camera pass, after, and written record. Second camera pass to verify the liner is clean and intact. You get a photo report with before-and-after images, the creosote class, any findings, and the work performed. Clause 4 of the Haven Standard: a documented photo record on every job. That’s been our practice since 2009.
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Warranty and follow-up. Every DuraFlex sweep carries the 365-Day Done Right Promise. If we missed something, we come back and make it right. You also get a written recommendation for your next sweep, based on what we actually saw, not a calendar default.
BeforeAfterWhat DuraFlex Chimney Cleaning & Sweep Costs in Greenwich
Here’s what we actually charge for DuraFlex work in Greenwich. These are flat ranges, not estimates you have to call to unlock:
- Standard DuraFlex sweep with Level 2 camera inspection: $229-$289
- Glazed creosote removal (Class II or III): add $80-$140 depending on severity
- Smoke chamber cleaning and sealing: $175-$250
- DuraFlex liner camera evaluation (no sweep, just the diagnosis): $129, credited toward future work
- Clamp re-torque and collar seal replacement: $45-$90
What moves the price: flue height (a three-story Greenwich colonial costs more than a single-story ranch), creosote class, and access (steep roof pitches near the Mianus River corridor add time). You’ll always see the number in writing before we start.
That’s the whole point. We don’t do “call for a quote.” Call (516) 399-5497 for a free estimate on your DuraFlex sweep. And if you have a written quote from another Greenwich company, bring it. We’ll give you a free second opinion on it.
Why Greenwich Homeowners Call Level Two Chimney Greenwich for DuraFlex Work
The camera doesn’t guess. Neither do we. Every DuraFlex job we do in Greenwich runs through the same standard we built our name on: camera down the flue, a written price on the table, and a documented record when we’re done. That’s been our process since 2009, and we’ve completed more than 38,000 chimney inspections and cleanings under it. Our Greenwich techs are background-checked, uniformed, and we put our license number on every page. One call to (516) 399-5497 reaches a live person, day or night.
When a DuraFlex liner needs more than a sweep, you’ll hear it from us straight. No scare pitch. We’ll show you the camera footage and explain exactly what it means. And because we also work with HeatShield and Gelco materials, we’re not married to one fix. If HeatShield resurfacing buys your liner ten more years for less than half the cost of replacement, that’s what we’ll recommend. If the DuraFlex liner is failing, we’ll quote the replacement in writing and source materials through our buying network to keep the price honest. Your call, based on what you can see, not what we tell you to believe.
FAQs
No. DuraFlex warranties require regular cleaning and inspection, and a mechanical sweep with a properly sized poly brush does not void coverage. What voids a DuraFlex liner warranty is neglect: creosote buildup that allows a chimney fire, or installation errors like wrong sizing. We document every sweep with camera footage, which is exactly the record you want if a warranty claim ever comes up. Call (516) 399-5497 and we’ll walk you through what your specific DuraFlex series requires.
Most Greenwich homes burning seasoned hardwoods need a sweep every 30 to 50 burns, which works out to once a year for regular users. But the honest answer depends on what the camera shows. A DuraFlex 316L liner with corrugated walls packs creosote faster than a smooth-wall liner, so if you burn oak and your fires run low and slow, you might need sweeping twice a season. We’ll tell you after the first inspection what your actual schedule should be. Schedule your first sweep at (516) 399-5497 and we’ll set the baseline.
Yes, but not with a standard brush. Glazed or Class III creosote is tar-like and hard, and a poly brush alone will not break it. We use a rotary whip head with nylon line or a chemical treatment followed by a mechanical pass, depending on how thick the glaze is. The after-camera pass confirms the liner walls are clean down to the steel. This adds to the sweep price, but it’s the difference between a liner that appears clean and one that actually is. We’ll show you the before-and-after footage so you can judge the work yourself.
Three things tell us: pinholes or rust-through on the camera footage, seam separation at the elbows or tee, and a liner that’s so warped or crushed that even a clean sweep leaves restricted draft. If we see any of those, we’ll put the footage on the screen and explain what it means in plain terms. We will not recommend replacement without camera evidence you can see yourself. If the liner is sound, a sweep is all you need. Call (516) 399-5497 for a camera inspection and a straight answer.
No. We are an independent DuraFlex service provider, not a factory-authorized dealer or installer. That independence matters to you: we have no incentive to tell you a DuraFlex liner is fine when it is not, and no incentive to sell you a replacement you don’t need. We work with materials from DuraFlex, HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield, sourced through our buying network, so we recommend what the camera shows is right for your Greenwich flue, not what a single manufacturer wants moved this quarter.
Written by Corrine Halstead, Owner, Level Two Chimney Greenwich at Level Two Chimney Greenwich, serving Greenwich and nearby areas.