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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AfterGelco Chimney Liner & Rebuild in Dix Hills: What to Know First
We replace, repair, and rebuild Gelco chimney liners throughout Dix Hills, typically completing most liner jobs in one day. As an independent Gelco service provider, we’re not tied to the manufacturer’s pricing or parts schedule, so you get a straight number before work begins and the same number on the invoice. If you’ve been told your Gelco liner is shot, call (631) 318-8656 and Wendell will give you an honest read on whether it actually is.
This page is for Dix Hills homeowners with Gelco stainless steel or flexible liners, especially those installed between roughly 1995 and 2015. We’ll walk through the failure modes we see most, what a rebuild actually involves, and what it costs here in Suffolk County. If you’re not sure what liner you have, we’ll figure that out on the first visit.
How Gelco Products Fail - and How We Fix Them
- Gelco flexible liners kinking at the smoke shelf. The Gelco Flex line was common in Dix Hills installs during the early 2000s. Where the liner transitions through the smoke shelf and into the flue, the corrugated wall can collapse inward if the original install didn’t use the right offset box. Symptom: you hear a rattle when the wind hits the cap just right, or the fireplace drafts fine at the start of a fire and gets sluggish after twenty minutes. That’s not “dirty chimney” – that’s a deformed liner choking the air path. Fix: we section out the kinked run and pull a new liner through, or install a proper transition plate if the entire liner needs replacement.
- Pinhole corrosion on mid-run Gelco stainless liners burning wood. Gelco’s 316 stainless handled most oak and maple fine, but Dix Hills homes burning a lot of pine or unseasoned cordwood run hotter and more acidic flue gas than the liner was rated for. We see pinholes form along the weld seam about 8 to 14 feet up, where the exhaust has slowed enough to condense but not enough to stop eating the metal. Symptom: a faint smoky smell in the wall cavity or attic, never in the room itself. Fix: if the pinholes are isolated, a sectional splice can buy years. If they’re clustered, it’s a full liner pull and replacement.
- Old Gelco liner cement crumbling at the crown. Gelco recommended a specific high-heat refractory mix for the crown-to-liner junction. Many installers substituted standard mortar. Twenty years later, that junction is powder, and water has been working its way between the liner and the original masonry. Symptom: efflorescence streaking down the brick below the crown, or water staining on the fireplace damper after heavy rain. Fix: rebuild the crown with proper refractory, reset the liner top plate, and re-flash. If the liner itself is sound, we don’t sell you a new one just because the crown failed.
- Termination cap separation on Gelco direct-connect systems. Direct-connect setups, where the liner runs from the appliance or fireplace up to an adapter plate rather than a full-top clamp, put all the weight on the plate screws. Gelco’s early plates used stainless screws into the terra cotta, and those anchors eventually crack the tile. Symptom: the cap wobbles when you touch it with a chimney brush (we’ll show you on camera). Fix: we upgrade to a top-mounted plate anchored through the brick or install a full-length liner with a proper top clamp. This is the most common thing we find on Gelco systems installed before 2005 in Dix Hills.
- Gelco rigid sections separating at the joints. Rigid Gelco liner came in 24-inch sections that twist-lock together. The lock rings are aluminum in some runs, and aluminum against stainless in a wet, acidic flue creates galvanic corrosion. The joint lets go. Symptom: you can feel a slight step or gap when we run the inspection camera up, and sometimes you can hear a ticking sound as sections shift during heating and cooling cycles. Fix: re-seat the section with a proper stainless lock ring if the rest of the liner is sound; sector-replace the run if it’s not. This is a case where the part is cheap and the access is not, so we’ll show you the footage before we quote anything.
Our Gelco Chimney Liner & Rebuild Process
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Call or text (631) 318-8656. You’ll get a live person, probably Wendell. Tell us what you’re seeing: smell, draft problems, water, or a home inspector’s note. We’ll give you a straight answer on what it might be and whether it needs attention before burning season.
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On-site inspection with camera. Wendell or a crew member arrives in uniform, on a real arrival window. We run the camera up the flue and you watch the footage with us. No interpretation games. If your Gelco liner is fine, that’s the end of the conversation and you owe us nothing more than a handshake.
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The verdict and the price. We explain what the camera showed, what’s urgent, and what can wait. If you need a liner repair or rebuild, you get a flat price in writing before a single tool comes off the truck. We’ll tell you when we can do the work and how long it takes.
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Parts decision, made with you. If the job needs new Gelco components, we discuss OEM versus quality aftermarket. Gelco is still manufactured, but lead times on certain rigid sections run three to six weeks. A DuraFlex or Olympia 316 liner may be available the same week and meets or exceeds the same safety standards. We give you the choice and the trade-off, not a lecture.
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The liner pull and rebuild. We protect the work area inside, remove the old liner, clean the flue, address any masonry the liner attaches to, and run the new components. Full rebuilds include a poured crown, proper top plate, and stainless cap. Partial work includes sectional repair and re-termination.
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Test fire and the Done Right Promise. We run a small test fire, check draft and smoke path, and hand you the final invoice. Every job carries the 90-Day Done Right Promise in writing. If something isn’t right, one call brings us back at no charge.
What Gelco Chimney Liner & Rebuild Costs in Dix Hills
Here are honest ranges based on what we’ve charged in Dix Hills over the last few years:
- Gelco liner inspection with camera: $149 to $249, waived if you do the repair with us
- Sectional splice or joint repair on existing Gelco liner: $275 to $600
- Full flexible liner replacement (Gelco, DuraFlex, or Olympia), typical 25-foot run: $2,100 to $3,800 depending on diameter and access
- Rigid Gelco section replacement, per section with labor: $180 to $340 per section, plus access
- Crown rebuild with liner re-termination: $900 to $2,200 depending on crown size and flashing
- Full chimney rebuild from the roofline up (brick, liner, crown, cap): $6,500 to $14,000
What moves the price: roof pitch and chimney height, whether the old liner comes out in one piece or fights us, and whether the surrounding masonry is still sound enough to anchor the new liner. Dix Hills homes built in the 1960s through 1980s often have taller chimneys and steeper roof lines than the post-2000 builds, which adds labor time. Estimates are free. Call (631) 318-8656 and Wendell will give you a number you can plan around.
Why Dix Hills Homeowners Call Top Hat Chimney for Gelco Work
We’ve been working chimneys in Dix Hills and the Half Hollow Hills area since 1999. Wendell grew up out west and learned the trade at Southwestern College in Chula Vista, but he’s spent more than twenty years on these particular roofs, and he’s run the camera up more Gelco liners in this town than he can count. If a liner doesn’t need replacement, he’ll tell you that and send you on your way. If it does, he’ll show you the footage before quoting a dollar.
Every job is covered by the 90-Day Done Right Promise in writing. Our phone rings to a live person 24 hours a day, which matters when you notice a problem on a Friday night and don’t want to lose a weekend of fires. We carry Gelco for owners who want to stay with the brand, and we also stock and install DuraFlex and HeatShield when a different product makes more sense for your flue and your budget. Ask anyone on your street.
FAQs
No, not when the replacement is installed by a licensed professional using code-compliant components. Most Gelco liner warranties are 10 to 25 years prorated and specifically require a certified installer, so if your liner is still under warranty, call Gelco first, then call us. We’ll work with them on the claim and install whatever they send. If the warranty period has passed, aftermarket 316 stainless from DuraFlex or Olympia is perfectly safe and often faster to get than waiting on a Gelco part. Call (631) 318-8656 and we’ll help you sort out what your warranty actually covers.
A liner can usually be saved if the damage is isolated to one section and the rest of the stainless is still sound. The only way to know for sure is a camera inspection. We’ve saved Dix Hills homeowners thousands over the years by sectioning out a kinked or corroded run instead of selling a full liner replacement. The footage and a plain-English verdict, every time, no exceptions. If the camera shows widespread corrosion or multiple failed joints, replacement is cheaper than repeated section work.
Most full liner replacements are done in one day. Sectional repairs usually take two to four hours. A full rebuild from the roofline up runs two to four days depending on weather and materials. We’ll give you a real arrival window and call if it slips, which matters in Dix Hills where a chimney job can get rained out just as easily as a golf game.
That depends on what the camera shows. Pinhole corrosion low in the run means combustion gases and carbon monoxide can leak into wall cavities instead of going up the flue, and that’s a hard no until it’s fixed. A loose joint or a cracked crown that’s letting in water is less urgent but still needs attention before the next burning season. When in doubt, have it inspected before you light another fire. The inspection is cheap; the consequences of a liner failure are not.
That’s the classic Dix Hills symptom of a failed crown or missing cap letting rain track straight down the inner wall. Water sits on the top plate, mixes with creosote, and the acid eats the liner from the top down. The lower sections often look fine, which is why a homeowner might only notice the rust when they look down from the roof and wonder what happened. Fix is usually crown and cap replacement and treating the affected section. Call (631) 318-8656 and we’ll show you exactly where the water’s getting in.
If your Gelco liner is giving you trouble, call (631) 318-8656 for a free estimate. Wendell will look at the chimney, show you the camera footage, and tell you straight whether it needs work now or can wait. No pressure, no upcharge at the door, and the 90-Day Done Right Promise on whatever we do. Serving Dix Hills and the Half Hollow Hills area since 1999.
Written by Wendell Pike, Owner, Top Hat Chimney at Top Hat Chimney, serving Dix Hills and nearby areas.