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.
Before
After
Before
After
Before
AfterDuraFlex Chimney Liner & Rebuild in New York City: What to Know First
DuraFlex chimney liner and rebuild work in New York City typically runs $1,900 to $8,400 depending on flue length, liner diameter, and whether the masonry shell needs rebuilding too. We complete most DuraFlex reline jobs in one day; full rebuilds with scaffold work take two to four days. You’ll get a written price, written scope, and written warranty before anything starts, not after our tech is already in your home. This page is written for homeowners and building owners who already have a DuraFlex liner, suspect it’s failing, or were just told by a sweep that they need one replaced, and want to know what that actually means in a city where chimneys run through parapet walls and tax lots older than the country. Call (980) 580-8641 and a person answers, day or night.
How DuraFlex Products Fail - and How We Fix Them
DuraFlex builds quality liners, but no liner is immune to New York City’s weather, salt air, and the way old masonry shifts. Here’s what we actually find when the camera goes down.
- Corrosion at the tee connection, DuraFlex 304 and 316 series. In New York City, most liners run through an exterior wall or chase, then enter a masonry chimney at the base. The tee, where the liner turns upward, collects condensation and rainwater that wicks through the crown. We see rust-through at the tee welds on 304 stainless in as little as six years in buildings near the river or with heavy heating-oil use. The fix is replacing the tee section and, when needed, upsizing to 316 for the bottom three feet where corrosion concentrates. Not the whole liner, just where it’s actually failing.
- Flex liner sag and belly-out inside old flues, DuraFlex Pro 316. Most Manhattan and brownstone Brooklyn chimneys predate 1930. Their flues are narrow, rough, and rarely straight. A flexible liner that kinked or compressed during install can sag, catch creosote, and eventually tear at the flex crease. We often pull the camera through and show the customer the fold on screen before we talk price. The fix is a new liner section pulled to spec with a hoist on the roof, not a hand pull that compounds the kink.
- Improper sizing for the appliance, DuraFlex HF and HFT series. A woodstove or gas boiler on a liner sized for the previous oil furnace runs into two problems: draft collapse and acidic condensate eating the liner wall. We measure the appliance input BTU and the flue height, then match the liner diameter to what the appliance actually needs. Not what the old one was. Undersized liners fail faster and put more carbon monoxide at the thimble.
- Failed joint bands at mid-run connections. DuraFlex uses proprietary couplers. When other contractors substitute aftermarket clamps or skip the sealant, the joints leak flue gas into the masonry cavity. In attached New York City row houses, that gas can migrate into the neighboring wall cavity. We replace with DuraFlex-specification bands and document every joint in the photo record. That record is Clause 4 of the Haven Standard, and it’s been standard on every job since 2009.
- Creosote glaze on the interior wall, even in “safe” liners. Class III creosote is a hard, tar-like glaze that forms when a liner runs too cool or when wet wood is burned. It’s hard to remove and corrosive. We see it most in liners serving open fireplaces in prewar buildings, where oversized liners and cold masonry make the flue wall a condensing surface. The fix is mechanical cleaning with rotary rods, then a camera check to confirm we got to bare metal. If the glaze has eaten pinholes, liner replacement is the honest answer.
Our DuraFlex Chimney Liner & Rebuild Process
- 1
Written price before anyone arrives. You call (980) 580-8641. We ask about your setup, flue type, and what the previous company said. Then we send a written price and written scope. Haven Standard Clause 1. No ‘technician will quote on site’ theater.
- 2
Camera down the flue, photo record started. Our named tech arrives with a scheduled text you already got. We run the camera top-down and bottom-up, noting liner condition, joint integrity, and what the flue wall actually looks like. You see the footage yourself.
- 3
Parts decision on the spot. If we’re matching an existing DuraFlex liner, we use the right series and diameter. If the existing liner is a discontinued line or has manufacturer-specific connections we can’t source cleanly, we tell you before we cut anything. We’ll quote OEM where it matters, quality aftermarket where it doesn’t, and explain the difference in plain terms.
- 4
Liner replacement or rebuild, done with scaffold where masonry is involved. For a straightforward reline, we pull sections from the roof with a hoist. For a partial rebuild, we cut out spalled brick one course at a time. For a full rebuild, we’re down to the smoke chamber and up from there. The smoke chamber is the space above the firebox where the flue drafts upward; New York City chimneys often hide cracked parging in there that no one saw for forty years.
- 5
Draft test and camera footage on the way out. We verify the draft with a pressure reading, run the camera again, and show you the before and after side by side.
- 6
You walk away with the file. Photos, camera footage, readings, written scope, and written warranty. If it’s not done right, we make it right. That’s the 365-Day Done Right Promise, stamped on every job under the Haven Standard.
BeforeAfterWhat DuraFlex Chimney Liner & Rebuild Costs in New York City
Here’s what we quote, in dollars, for the most common DuraFlex jobs in New York City. These are installed prices, not parts-only.
- DuraFlex liner section replacement, single flue, 20-30 ft. $1,900 to $3,400 depending on diameter and roof access.
- Full stainless reline, DuraFlex Pro 316, 25-35 ft with tee and rain cap. $3,800 to $6,200.
- Partial masonry rebuild, top 3-5 feet of chimney, plus new liner. $4,500 to $7,300.
- Full chimney rebuild from roofline up, includes new DuraFlex liner, crown, and cap. $6,800 to $9,600.
- Liner repair only, mid-run coupling or tee replacement. $850 to $1,700.
What moves the price: scaffold requirements, roof pitch, liner diameter and alloy, whether the flue runs through an interior or exterior wall, and how much masonry actually needs rebuilding. We don’t quote over the phone on rebuild work without a camera look, but we will give you the written range before anyone schedules a visit, and the exact price before anyone starts. Estimates are free. We also honor a free second opinion: bring us any competitor’s written quote and we’ll tell you honestly whether you’re being overcharged, even if you end up not hiring us.
Why New York City Homeowners Call Emberly Chimney Cleaners for DuraFlex Work
Most New York City chimney companies will tell you the liner is shot, hand you a number, and leave you to take their word for it. We don’t do that. Corrine Halstead, our owner, grew up in Inwood and spent years working inspections and cleanings across all five boroughs before starting Emberly. She still shows customers the camera footage herself, pointing out exactly what the flue walls look like before any conversation about price. That’s the standard. The camera doesn’t soften what it finds. Neither do I.
Beyond the camera, we stock and source DuraFlex, HeatShield, and Gelco through Haven’s buying network specifically to keep customer prices honest. Every tech is background-checked, uniformed, and license information is displayed on every page. Calls are answered by a live person, 24/7. And the 365-Day Done Right Promise means we stay responsible for the job after we leave the roof.
FAQs
No, provided the work is done to the liner’s installation spec and the product is still within its warranty window. As an independent DuraFlex service provider, we are not affiliated with or authorized by DuraFlex, and we don’t claim manufacturer warranty coverage on our labor. We document every joint and connection with the camera so you have a real record if a warranty claim is ever needed.
We can match series and diameter in most cases, including DuraFlex Pro 316 and the HF/HFT series. If the existing liner is heavily creased, kinked, or corroded along most of its length, patching it is throwing good money after bad. We’ll show you the footage and tell you which one you’re looking at. Call (980) 580-8641 for an exact quote, estimates are free.
For the common diameters and series, same week in most New York City boroughs. For specialty or discontinued DuraFlex lines, we’ll tell you the lead time before you commit to anything. No surprises after the flue is open.
A camera inspection will tell us in minutes. If the liner is intact, not pitted, and joint bands are sound, you pay for a sweep. If the liner has pinholes, joint gas leakage, or glaze that’s eaten the wall, you’ll see it on screen before we talk replacement price. No scare-selling, no liner replacement you can’t verify.
A leaking liner lets flue gas and creosote vapors into the masonry cavity, and in attached New York City rowhouses, that means your neighbor’s wall too. Carbon monoxide at the thimble and chimney fires at the creosote layer are the two risks. If the camera shows a cracked liner joint, the repair is not optional. Call (980) 580-8641 and we’ll give you the straight answer with the footage to prove it.
Book Your DuraFlex Inspection in New York City
If you have a DuraFlex liner and want to know whether it’s still doing its job, the camera will answer that in under an hour. Call (980) 580-8641 for a free estimate. You’ll talk to a person, get a written price before any work starts, and walk away with a documented record of exactly what we found. That’s how we’ve done it since 2009, and it’s how we’ll do it at your place.
Written by Corrine Halstead, Owner, Emberly Chimney Cleaners at Emberly Chimney Cleaners, serving New York City and nearby areas.