DuraFlex Chimney Liner & Rebuild Nationwide

DuraFlex Chimney Liner & Rebuild in Manhattan: What to Know First

Level Two Chimney Manhattan provides independent DuraFlex chimney liner installation, repair, and full chimney rebuilds across Manhattan, typically completing liner work in one to two days depending on flue access and building height. Liner replacement in Manhattan brownstones, co-ops, and pre-war buildings generally runs $2,800 to $7,500, while a full chimney rebuild with new DuraFlex liner starts around $9,000 and can reach $25,000 on taller structures with masonry work. Every job gets a written price before work starts, a camera-documented photo record, and the 365-Day Done Right Promise. Call (862) 319-8047 for a free estimate.

Call (862) 319-8047

This page is written for Manhattan homeowners and co-op boards who already own a DuraFlex liner or are researching DuraFlex for a liner replacement and want someone who knows the product’s failure points, not just how to install it. As an independent DuraFlex service provider, we’re not authorized by the manufacturer, but we’ve pulled, inspected, and replaced enough DuraFlex liners across the borough to know exactly where they fail and what that failure looks like on camera.

How DuraFlex Products Fail - and How We Fix Them

• Oval-to-round deformation at the flue collar (DuraFlex 316Ti and 316Ti-Smooth). In Manhattan pre-war buildings, liners are often pulled through tight clay tile flues under tension, which can distort the oval shape and break the weld seam where the liner meets the appliance connector. We’ll camera the collar first, map the distortion, and either re-round with a mandrel or replace the liner section entirely.
• Pinhole corrosion in the first 18 inches above the appliance (DuraFlex Duraliner). This is the single most common DuraFlex failure we see in Manhattan. Combustion condensate pools at the base of the liner and sits on the stainless, eating through within 8 to 12 years. The camera shot shows a ring of rust exactly where the liner turns vertical. We cut out the corroded section, install a new DuraFlex base tee, and re-insulate that section to keep flue gas hot enough to carry condensate up and out.
• Crushed flex sections behind the smoke chamber (DuraFlex AF and 316Ti-Smooth). Manhattan rooftop access is often through tight bulkheads, and liners get crushed when installers angle them through the smoke shelf before the final vertical pull. You’ll get draft reversal, smoke spillage, and creosote buildup we can measure. We re-line from the top down rather than pulling blind, then verify with a second camera pass.
• Seam separation in smooth-wall liners (DuraFlex 316Ti-Smooth and 316Ti-Smooth-Light). Smooth-wall DuraFlex liners are more rigid than the flex versions and more prone to seam splitting when the chimney shifts. Manhattan clay tile flues in buildings on landfill or old seawall fill shift more than most. We find the seam split with the camera, then decide: if the chimney structure is sound, we’ll replace the liner. If the chimney itself is moving, the liner fix is a bandage and the masonry work comes first.
• Improper prior installation with aftermarket parts (any DuraFlex line). We regularly open walls or thimbles in Manhattan to find DuraFlex liners connected with generic band clamps, foil tape, or mismatched thimble adapters. Aftermarket connectors on a DuraFlex job are a warranty-killer and a draft-killer. We use manufacturer-spec DuraFlex connectors whenever the liner itself is sound. If the liner is beyond repair, we’ll quote a full replacement and document why with photos.

Our DuraFlex Chimney Liner & Rebuild Process

Here’s how a typical DuraFlex job runs with us, start to finish:

1. 1
   Call and real diagnosis. You call (862) 319-8047, a live person answers, and we book a camera-scan inspection. No voicemail tag. Corrine Halstead or a named tech shows up with a Level 2 camera rig.
2. 2
   Camera down the flue, live view with you. We push the camera from the appliance connector to the roof cap and narrate what we see in real time. You’ll see the pinholes, the crushed section, or the clean liner with the bad connector. Clause 4 of the Haven Standard requires a photo record on every job, and you get the images before we talk price.
3. 3
   Parts decision on the table. If we can repair with OEM DuraFlex parts and keep your warranty intact, we’ll say so. If an aftermarket part is genuinely equal, we’ll say that too, and tell you the cost difference. No mystery parts. No “trust us” moments.
4. 4
   Written scope, written price, written warranty. You get a document that says exactly what’s being replaced, what it costs, what parts we’re using, and what the warranty covers. You sign before anything starts. The price doesn’t change unless you change the scope.
5. 5
   The work and the test. We pull or repair the liner, run a draft test with a manometer, and fire the appliance if it’s safe to do so. Then we camera the finished flue from top to bottom so you can see the liner is properly seated, sealed, and clear.
6. 6
   Cleanup and the file. We leave the site broom-clean, hand you a written completion report with the photo documentation, and your job is on file with us permanently. If anything fails within 365 days, the Done Right Promise applies.

Before

After

What DuraFlex Chimney Liner & Rebuild Costs in Manhattan

Here’s what we quote, in writing, before any work starts:

• DuraFlex 316Ti flexible liner replacement, 25-35 feet, single-story flue: $2,800 to $4,200
• DuraFlex 316Ti-Smooth installation, multi-story flue with scaffold access: $4,500 to $7,500
• Corrosion section repair at the base tee (DuraFlex Duraliner): $850 to $1,600
• Full chimney rebuild with new DuraFlex liner, Manhattan masonry work included: $9,000 to $25,000 depending on roof height, parapet work, and liner run

Price moves on four things in Manhattan: flue height, roof access (a scaffold on a 6-story UES walkup costs more than a 2-story West Village brownstone), whether the flue lining itself is clay tile that needs breaking out, and whether the masonry around the chimney is part of the job. We give you the written number before we start, and we don’t pad it after the fact. Call (862) 319-8047 for a free estimate on your specific flue.

Why Manhattan Homeowners Call Level Two Chimney Manhattan for DuraFlex Work

We’re the sweep company that made camera-documented inspection the default back in 2009, years before insurers or regulators required it. That practice is now Clause 4 of the Haven Standard, and it’s why every DuraFlex job we touch comes with a photo record, not a tech’s notes from memory. Our techs are background-checked and uniformed, you get a named technician and a text when they’re on the way, and our calls are answered by a live person 24/7. If a DuraFlex liner is beyond saving, we’ll tell you, and we’ll show you the camera footage on the spot. We also work with HeatShield and Gelco systems, so if a ceramic resurfacing is genuinely the better call for your flue, we won’t upsell you into a stainless liner you don’t need. Corrine Halstead walks every job herself at least once, and she built the company on putting camera footage and a written price in front of a customer before asking them to sign anything. The camera doesn’t guess. Neither do we.

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