DuraFlex Chimney Liner & Rebuild Nationwide

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

DuraFlex chimney liner and rebuild work in Yonkers typically runs $2,400 to $6,800 depending on liner length, flue access, and how much of the existing chimney structure has given out. Most DuraFlex liner replacements take one day once materials are in hand; a full rebuild from the roofline up runs three to five days. We give you a written price on paper before any work starts, not a phone estimate with fine print. This page is for Yonkers homeowners with a DuraFlex liner that’s failing, a chimney that’s spalling or leaning, or a liner that was red-flagged during a home inspection. If you’ve got a camera report that says “liner compromised,” call (551) 212-3526 and we’ll walk you through what you’re actually looking at. Corrine Halstead heads our Yonkers crew, and she’ll tell you the same thing she tells every homeowner: the camera doesn’t lie, and neither does the quote.

Call (551) 212-3526

How DuraFlex Products Fail - and How We Fix Them

DuraFlex makes solid stainless liners, but “solid” doesn’t mean “forever.” Here are the five failure patterns we see repeatedly in Yonkers homes, across the specific series and configurations we encounter:

• DuraFlex 316L single-wall flex corroding at the flue gas transition. In older Yonkers row houses where the water heater shares a flue with the fireplace, condensation collects at the first 3 to 5 feet of liner above the appliance tap. That acidic condensate eats pinholes in the 316L alloy faster than the upper reaches. We see it on camera as a line of rust blooms right at the T-connection. The fix is almost always a sectioned replacement, not a patch. Patch clamps on flex are a temporary band-aid that the liner’s flexing works loose within a season.
• DuraFlex Pro liner collapsed at the offset bends. The Pro series handles tighter radius turns, but installers in older Yonkers chimneys with severe offsets sometimes force the flex past its rated bend. The liner kinks, the inner wall partially closes, and draft drops to the point where smoke rolls back into the room. When we scope it, the kink shows as a readable narrowing on the camera footage. The fix is pulling the liner and either rerouting with proper offset supports or, when the flue path is too aggressive, stepping the homeowner through a rebuild of the smoke chamber to ease the angle.
• DuraFlex smooth-wall dented or crushed from chimney impact. A falling limb during a Nor’easter, a rogue ladder, a masonry crown that cracked off and tumbled down the flue before installation. Smooth-wall liners have tighter clearances than flex, and a dent that’s only 1/4 inch deep can turn into a creosote collection shelf. We find these by running the camera slowly and measuring the deformation against the liner’s spec. A dented section gets cut out and replaced. A crushed liner is a full replacement, and we’ll show you the video before quoting the work.
• DuraFlex connector boxes and rain caps failing at the mortar joint. Yonkers freeze-thaw cycles work the gap between the cap and crown relentlessly. Water seeps in, freezes, expands, and the connection loosens. The liner itself may be fine, but water is now running down the outside of the pipe and into the smoke chamber. We have fixed what we call “cap creep” dozens of times: reseal the cap with high-temp silicone, recrown the chase, and in some cases add a storm collar if the installer skipped it. That last one happens more than you’d think.
• DuraFlex hybrid systems where the firebox floor has shifted. In Yonkers homes built on clay soil near the Saw Mill River, foundation settling puts pressure on the firebox. The liner stays intact, but the firebox floor shifts and the liner separates from the flue tile below. This shows up as smoke in the basement and a draft reversal you can feel. The rebuild here is structural: we remove the firebox floor, true up the base, and reconnect with a proper adapter plate. We don’t just shove mortar into the gap and walk away.

Our DuraFlex Chimney Liner & Rebuild Process

1. 1
   The call. You reach a live person at (551) 212-3526, day or night. We ask what the chimney’s doing, what the home inspection flagged, and what the previous company did. No hold music, no voicemail.
2. 2
   The camera scope. We run a Level 2 camera inspection down the flue. You watch the screen with us. If there’s a hole, a kink, a separation, or a failed joint, you’ll see it with your own eyes before anyone asks you to spend a dollar.
3. 3
   The parts decision. If the damage is a single section, we price a match-quality DuraFlex replacement section or an equal-spec aftermarket piece from our Haven buying network, which sources from HeatShield and Gelco as well. If the liner is structurally compromised, we recommend full replacement and explain exactly why. You get a written options list with OEM and aftermarket pricing side by side.
4. 4
   The work. Your named technician, background-checked and uniformed, performs the liner pull, section swap, or full rebuild. If the chimney stack itself is spalling, leaning, or cracked, we bring in our masonry crew under the same roof and same quote. No subcontractor roulette.
5. 5
   The proof. A second camera run after the work is done. Before-and-after footage, date-stamped. Clause 4 of the Haven Standard requires it, and we’ve been doing it on every job since 2009.
6. 6
   The paperwork. You get a written scope of work, an itemized invoice, and a written warranty on parts and labor. The 365-Day Done Right Promise is stamped right on it. If it’s not done right within a year, we make it right.

Before

After

What DuraFlex Chimney Liner & Rebuild Costs in Yonkers

We publish prices because you shouldn’t have to guess. Here’s what DuraFlex liner and rebuild work actually costs in Yonkers, based on the jobs our crew completes week to week:

• Stainless steel liner replacement, single story: $2,400 to $3,600. Covers a typical 15 to 25 foot run in a one-story Yonkers colonial with a straight flue.
• Stainless steel liner replacement, two story or steep roof: $3,200 to $5,200. Longer runs, scaffold work, or a chimney that requires a pull-and-drop from above.
• Section repair (patching or replacing one section of flex): $600 to $1,500. Only when the camera footage proves the rest of the liner is sound, and the homeowner wants to extend the liner’s life rather than replace it outright.
• Partial chimney rebuild (crown, top courses, liner swap): $4,200 to $7,800. Covers the top 3 to 5 feet of masonry that Yonkers freeze-thaw routinely destroys.
• Full chimney rebuild from the roofline up: $7,500 to $15,000. Structural rebuild, new liner, new crown, new cap, full flashing detail.
• Smoke chamber repair or firebox floor rebuild: $900 to $3,400 on top of the liner work. This is the hidden cost that dishonest contractors quote separately after the liner is already out. We quote it up front.

What moves the price: roof pitch, scaffold requirements, whether or not the old liner comes out cleanly, and how much masonry needs to come down. Yonkers chimneys built before 1960 often have no clay tile at all, which complicates liner sizing. Call (551) 212-3526 for a free estimate. The price you get on paper is the price you pay.

Why Yonkers Homeowners Call Level Two Chimney Yonkers for DuraFlex Work

We’re an independent DuraFlex service provider, not a manufacturer warranty center, and that matters more than you’d think. We can tell you honestly when a repair makes sense and when it’s time to stop feeding money into a liner that’s past its useful life. Since 2009, we’ve inspected more than 38,000 chimneys, every single one with a written price before work started and a documented photo record when it was done. Our techs know the difference between a DuraFlex Pro installed correctly and a cheap flex liner fished in by a guy with a van and no camera. If a HeatShield resurfacing is a better fit than a full liner, we’ll tell you that too, because we’re not married to one product line. We’re married to giving you a straight answer. Our live phone line runs 24/7, and a text goes out when your technician is on the way. The license number is on every job sheet.

FAQs