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
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Before
AfterHeatShield Flue Liner Replacement: The Huntington Owner’s Guide
A HeatShield flue liner replacement in Huntington typically runs $2,800 to $4,500 installed, depending on chimney height and whether the terra cotta needs partial rebuild before the new liner drops. We stock HeatShield-compatible flue liner kits on our trucks, and most Huntington replacements are completed in a single day. Homeowners usually discover the problem during a Level-2 inspection - often after a chimney fire scare, a failed real estate transaction, or a sweep who won’t sign off on the system until the liner is documented sound.
Which HeatShield Models This Applies To
HeatShield builds two distinct liner systems, and knowing which one you have determines whether we’re replacing a sleeve or resurfacing in place. The Cerfractory Flue Sealant system is a resurfacing product applied directly to existing terra cotta - it doesn’t get “replaced” so much as reapplied when it delaminates. The HeatShield Pro and HeatShield UL systems are actual stainless steel liners or hybrid sleeves, and these are what we typically pull and replace in Huntington’s older Colonials and Cape Cods.
To identify your system, check the cleanout door or top plate for a stamped metal tag. HeatShield Pro tags show a series number (Pro 200, Pro 300) that corresponds to liner diameter. The UL-listed systems carry a silver certification sticker with the install date - critical because HeatShield’s factory warranty on Pro series is 20 years from that date, and we’ve seen Huntington homeowners assume coverage that expired in 2019. We are an independent service provider with no affiliation to HeatShield Corporation; we source their products through authorized distribution and match them against DuraFlex and Gelco equivalents when the application calls for it.
OEM HeatShield liners ship with factory-spec top plates and bottom collars. Aftermarket equivalents from Gelco meet the same UL 1777 standard but may use slightly different gauge stainless - 316Ti in some Gelco runs versus HeatShield’s standard 316L. For Huntington’s salt-air exposure, especially within a mile of Huntington Harbor or Northport Bay, we often spec the higher-grade material regardless of brand.
Signs Your HeatShield Flue Liner Replacement Is Failing
- Flaking or spalling visible at the cleanout. If you’re sweeping out fragments that look like burnt pottery shards, your terra cotta liner is shedding behind a HeatShield resurfacing job that may no longer be bonded. We see this most in Huntington’s pre-1950s homes where the original flue was sized for coal and never properly adapted to oil or gas conversions.
- Smoke drafting into living spaces during shoulder-season fires. A liner with gaps or separation loses the negative pressure that pulls smoke upward. In Huntington’s fall and spring, when outdoor temperatures sit close to indoor, weak draft becomes obvious first.
- White efflorescence or rust streaks on exterior masonry. These salts indicate moisture penetrating the flue system, usually through a liner crack that’s allowing condensation to reach the brick. The north-facing chimneys along Cold Spring Harbor Road collect more of this than south exposures.
- A chimney fire that seemed minor but left the house smelling of creosote for days. Even a small flue fire can warp or crack a stainless liner at the elbow or offset. HeatShield Pro liners with factory-welded seams hold up better than hand-seamed retrofits, but nothing survives sustained over-firing unscathed.
- Your sweep refuses to issue a certificate of inspection. In Suffolk County, a Level-2 inspection with photo documentation is standard for real estate and insurance. If the camera shows gaps, shadows, or liner displacement, no ethical sweep signs off. We’ve had Huntington homeowners bring us second-opinion photos from inspectors who stopped short of recommending replacement - our camera usually confirms what theirs suggested.
Replacement Cost & What’s Included
For a typical Huntington single-flue chimney, 15 to 25 feet from fireplace to crown:
| Component | Price Range |
|---|---|
| HeatShield Pro or equivalent liner kit (liner, top plate, bottom connector) | $1,400 - $2,200 |
| Labor: removal, sizing, installation, seal | $1,000 - $1,800 |
| Terra cotta partial rebuild (if needed at offset or top) | $400 - $800 |
| New crown or cap (if deteriorated) | $350 - $600 |
| Typical total installed | $2,800 - $4,500 |
What drives the range: chimney height above roofline, number of offsets or bends, accessibility (steep Huntington roofs on Centerport or Halesite water-view homes add time), and whether the existing liner can be extracted intact or must be cut and pulled in sections. We price every job upfront after camera inspection - the number on the estimate is the number on the invoice. Our 90-Day Done Right Promise covers the installation in writing, no arguing. If it’s not right, we come back.
DIY or Call Us?
There’s a short, honest list of what a Huntington homeowner can safely check: confirm the damper opens fully, verify the chimney cap isn’t clogged with leaves, and look down the flue with a flashlight for obvious obstructions. That’s the boundary.
Everything past that point involves real hazard. A flue liner replacement requires working at height on a pitched roof, handling sharp stainless edges, and properly sizing combustion air for the connected appliance. More critically, an improperly seated liner creates a path for carbon monoxide into living spaces - odorless, invisible, and fatal. We’ve responded to calls in South Huntington and Elwood where a homeowner’s self-installed liner separated at the thimble, and the CO detector saved lives that the installation put at risk. For this work, a trained professional isn’t a luxury. It’s the job done right.
Call (631) 776-4075 for a free estimate. We’ll camera the flue, show you the photos, and price the replacement plain.
FAQs
How long does a HeatShield flue liner last in Huntington?
A properly installed HeatShield Pro stainless liner should last 20 to 30 years, though salt-air corrosion and acid condensation from modern high-efficiency appliances can shorten that in homes within a mile of Long Island Sound. Annual inspection catches early degradation before it becomes replacement. Call (631) 776-4075 to schedule - estimates are free.
Can a HeatShield liner be repaired instead of replaced?
Small gaps in a resurfacing system can sometimes be patched with new Cerfractory sealant, but cracked or separated stainless liners require full replacement - patches fail at temperature extremes, and no sweep we know will warranty a partial fix. We show you the camera footage and give you a straight recommendation either way. Call (631) 776-4075 for an exact quote - estimates are free.
How long does the replacement take?
Most single-flue replacements in Huntington are completed in four to six hours, with the crew arriving between 8 and 9 AM and finishing before dinner. Two-flue systems or chimneys with tight offsets may run into a second day, but we stock standard diameters on our trucks to avoid delay. Call (631) 776-4075 to check availability - estimates are free.
Do you stock HeatShield liners, or is there a wait?
We carry 6-inch, 7-inch, and 8-inch HeatShield-compatible kits on our trucks, along with DuraFlex and Gelco equivalents in the same sizes. Odd diameters or lengths over 35 feet require a two-day order from our distributor in Bohemia. We’ll know exactly what you need after the camera inspection. Call (631) 776-4075 to book - estimates are free.
A clean chimney isn’t a luxury - it’s just the job done right.
Written by Russell Haines, Owner, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving Huntington and nearby areas.