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 Liner & Rebuild in Brooklyn: What to Know First
We install, repair, and rebuild DuraFlex chimney liners across Brooklyn, and most liner jobs are done in a single day once we’re on the roof. A straightforward DuraFlex liner replacement in Brooklyn typically runs $2,800 to $5,200 depending on flue height, access, and whether the old liner comes out clean or fights us. You’ll get a firm price before any work starts, and we’ll show you camera footage of what’s actually going on inside the flue before we recommend anything. This page is for Brooklyn homeowners who own a DuraFlex liner and want straight answers about repair versus replacement, real costs, and what a proper rebuild involves. Call (516) 289-9316 and Wendell or one of his crew will talk you through it.
How DuraFlex Products Fail - and How We Fix Them
DuraFlex makes a solid liner. We’ve installed plenty of them. But every product has weak points, and after working Brooklyn chimneys for over two decades, we know exactly where DuraFlex liners give out and why. Here’s what we see most often:
- DuraFlex 316L teardrop liner kinking at the offset. Brooklyn’s older brownstones and row houses have flues with sharp offsets where the chimney jogs to clear a neighboring wall or roofline. The teardrop profile is strong, but if the liner was pulled through a tight offset without enough care, it kinks right at the bend. That kink becomes a creosote trap and eventually a crack. We pull the liner, inspect the offset path, and either re-pull with proper guide cones or switch to a smooth-wall DuraFlex Pro section for that transition.
- Condensation eating the liner from the outside in. This is a Brooklyn climate reality more than a DuraFlex defect. High-efficiency gas appliances push cooler exhaust, which condenses inside the flue. In Brooklyn’s humid summers and cold winters, that condensation cycle is relentless. On 316L liners running gas appliances, we see pitting and rust-through at the lower third of the liner where that acidic condensate pools. The fix is often a DuraFlex Pro 316Ti liner, which handles condensate better, and making sure the liner is properly sized so exhaust moves fast enough to clear moisture.
- Improper termination at the crown. A lot of DuraFlex liner failures in Brooklyn start at the top, not the body. If the top plate wasn’t sealed correctly against the crown, or the storm collar is missing, water runs down between the clay tile and the liner. Over time that water freezes and thaws through Brooklyn winters, corroding the liner from the outside. We see this on both DuraFlex 304 and 316T series liners. The fix is straightforward: proper top plate, silicone-sealed storm collar, and a cap that actually sheds water away from the flue opening.
- Ripped liner mesh during cap replacements. DuraFlex liners often have a mesh or screen component, especially the flexible corrugated models. When a homeowner has a cap replaced by someone who doesn’t know DuraFlex, we see torn mesh around the cap connection. The liner itself may be fine, but that tear lets rain and debris down the flue. It’s a small repair when caught early; it’s a liner replacement when ignored for a season or two.
- Warped or separated liner at the appliance connector. On both DuraFlex 316L and Pro series jobs, the connection point where the liner meets the appliance collar takes the most heat cycling. In Brooklyn kitchens and basements where gas stoves or boilers run hard through winter, we see the stainless fatiguing at that junction. The liner wall gets thin, the connector loosens, and exhaust starts leaching into the living space. We inspect that connection on every job. If the liner body is sound, we replace the connector section. If the fatigue has spread further up, we’ll tell you straight that a full liner replacement is the safer call.
Our DuraFlex Chimney Liner & Rebuild Process
When you call us about a DuraFlex liner in Brooklyn, here’s what actually happens:
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You call, a person answers. 24/7, and it may be Wendell himself. You’ll describe what’s going on, and we’ll set a time that actually works. No call center, no phone tree.
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We inspect the flue with a camera. Before we quote a liner or rebuild, we put a camera up the flue. You’ll see the footage. If it’s a cracked tile and not a liner problem at all, we’ll tell you that. If a $400 repair buys you another five years, we’ll tell you that too. If it doesn’t need doing, we’ll say so.
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You get a firm price in writing. For a liner replacement, that’s a single number covering parts, labor, and cleanup. For a rebuild, it’s broken out so you understand what each component costs. No surprise line items when the job’s done.
- 4
We pull the old liner and prep the flue. On DuraFlex jobs, we pull the old liner, clean the flue thoroughly, and address any offsets or rough spots before the new liner goes in. That prep work is where most sloppy installs go wrong, and we don’t skip it.
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Install, test, and prove it. We install the new DuraFlex section or full liner using manufacturer-recommended fasteners and connection methods, because we’re an independent DuraFlex service provider and we want the work to hold up. Then we run a draft test and camera-verify the finished job.
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You walk away with our 90-Day Done Right Promise. Every job, in writing. If something’s not right, one call brings us back at no cost.
What DuraFlex Chimney Liner & Rebuild Costs in Brooklyn
| Job | Typical Range | What Moves It |
|---|---|---|
| DuraFlex liner replacement (single flue, one story) | $2,800 - $3,800 | Flue height, access, liner diameter |
| DuraFlex liner replacement (two- to three-story Brooklyn brownstone) | $3,500 - $5,200 | Roof pitch, offset count, scaffolding needs |
| Partial rebuild (top 15-20 courses of brick, new crown, top plate) | $3,000 - $6,500 | Brick match, crown complexity, flashing work |
| Full chimney rebuild (from roofline up or full height) | $6,800 - $14,000+ | Height, brick salvage, structural repairs, permits |
| Liner repair (connector replacement, small section patch) | $350 - $800 | Access, parts, whether camera inspection shows deeper damage |
Brooklyn rebuild prices skew higher than the boroughs to the east for two reasons: roof access is tighter, and brick matching on prewar brownstones is harder. We’ll never quote you a rebuild without camera footage showing why it’s necessary. Free estimates on liner and rebuild work. Call (516) 289-9316.
Why Brooklyn Homeowners Call Top Hat Chimney for DuraFlex Work
We’ve been at this since 1999, and Wendell Pike has worked Brooklyn chimney tops from Flatbush Avenue to the quieter blocks of Carroll Gardens. That’s a long enough run that the phone number still gets picked up by a live person at 2 a.m., and the name on the truck is the same name you’ll run into at the hardware store. Every DuraFlex job gets the 90-Day Done Right Promise in writing. Background-checked crew in uniform. And if DuraFlex isn’t the right fix for your flue, we also work with HeatShield and Gelco ceramic systems, so we can give you an honest comparison instead of pushing one brand because it’s what’s on the truck. We’re locally owned, independently operated, and we put our name on every job because we’ll see you again on Saturday.
FAQs
It depends on the repair and how old the liner is. DuraFlex warranties cover manufacturing defects, not installation errors or environmental damage. If someone installed the liner improperly and it failed, the original installer’s workmanship is usually the issue, not the product. We’re an independent DuraFlex service provider, not a manufacturer-authorized shop, so we’ll always tell you if a repair is worth doing or if a warranty claim with the original installer is the better path first. Call (516) 289-9316 and we’ll walk through your specific case.
You can often match a section, especially on the Pro series where connections are designed for sectional installation. But the older the liner and the more condensation damage we see, the less sense a patch makes. On DuraFlex 316L liners over eight years old running gas appliances, we typically recommend full replacement because the wear is usually consistent along the entire lower third, and patching one spot just moves the failure point. We’ll show you the camera footage and let you decide with your eyes, not our word. Call (516) 289-9316 for a free estimate.
Most common sizes are available locally within a day or two. We keep standard 316L and Pro series diameters on hand for typical Brooklyn flues, and specialty sizes or odd offsets take about three to five business days. If it’s a safety issue, like an active leak into the living space, we’ll tell you the straight timeline and get it scheduled the same week. Call (516) 289-9316 and we’ll give you a real arrival window, not a four-hour window that slips.
The camera tells us. A liner repair is about the stainless sleeve inside the flue. A rebuild is about the masonry structure around it. In Brooklyn, we see plenty of cases where the liner is fine but the crown is shot and the top courses of brick are spalling. We’ll inspect both, show you footage of each, and give you a plain-English verdict. If the masonry doesn’t need it, we won’t sell it to you. Call (516) 289-9316 to schedule an inspection.
It means we’re not owned by DuraFlex, not authorized by them, and not beholden to their dealer network. We install and service their products because we’ve seen them hold up well in Brooklyn chimneys for years. But when a different liner or ceramic system is genuinely better for your flue, we’ll tell you that too. We’re paid to fix your chimney, not to move a particular brand. Call (516) 289-9316 and we’ll give you the honest comparison.
Ready to Get Your DuraFlex Liner Looked At?
Call (516) 289-9316 for a free estimate on DuraFlex chimney liner and rebuild work in Brooklyn. A live person answers, every time. Wendell or one of his crew will walk the roof, run the camera, and tell you exactly what’s needed and what it will cost before anything gets touched. Free second opinion on any written estimate. No trip charge inside the county. Senior and veteran discounts always. $40 off any repair over $200.
Written by Wendell Pike, Owner, Top Hat Chimney at Top Hat Chimney, serving Brooklyn and nearby areas.