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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AfterWhy Commack Homeowners Choose Gelco Chimney Cleaning
We provide independent Commack Gelco service for chimney cleaning, inspection, and repair throughout Commack, NY, and we’ve been doing it long enough to know exactly how Gelco liners behave in the chimneys out here. Top Hat Chimney is not affiliated with or authorized by Gelco - we’re an independent service provider, which means we tell you what your liner actually needs, not what a factory protocol says to sell. Wendell Pike has been running crews through Suffolk County since 1999, and he’s pulled enough Gelco liners out of Commack chimneys to know their weak points by heart. If you need straight answers about a Gelco liner, call (631) 502-3612.
Most Commack homes were built between 1950 and 1975, and a lot of them still have original masonry chimneys with clay tile liners that are cracked, offset at the joints, or missing sections altogether. Gelco flexible liners were often installed to fix exactly those problems - but a liner is only as good as the install and the maintenance. We see Gelco aluminum liners with corrugations packed full of hardened creosote, stainless liners with pinhole corrosion from gas-appliance condensate, and oval liners kinked at chimney offsets. These are known failure modes, not surprises, and that’s the difference between a chimney sweep who has worked with Gelco products for years and one who just showed up with a brush.
Why Trust Top Hat Chimney for Your Gelco Chimney Cleaning?
Wendell learned the trade at Southwestern College in Chula Vista, picked up his first brush before he was twenty-five, and has spent the better part of two decades running crews through Suffolk County, including plenty of jobs in the Burr Farms neighborhood of Commack. When we send someone for Gelco in Smithtown or Commack, that person has seen the liner’s failure modes before - the mid-run seam separation, the corrugation buildup, the acidic condensate pinholes - and knows how to diagnose them without guesswork. We do not send a stranger who has to read the manufacturer’s spec sheet while standing on your roof.
Since 1999, Top Hat Chimney has been locally owned and owner-operated. We publish our address and license number. Wendell puts his name on the work, and he runs into you again on Saturday at the hardware store. Every Gelco service job gets upfront pricing before a single tool comes off the truck, and every completed job carries our 90-Day Done Right Promise in writing: if it’s not right, one call brings Wendell back at no additional cost. If it does not need doing, he will be the first one to tell you.
Common Gelco Chimney Cleaning Problems We Fix in Commack
- Creosote packing in Gelco 6″ Round Flexible Aluminum Liners. The corrugated walls of aluminum flex liners trap creosote faster than smooth clay tile or smooth-wall stainless. Wood stoves make it worse - the lower flue temperatures let creosote condense on the corrugations and harden. In Commack homes where a Gelco 6″ aluminum liner serves a wood stove, we routinely rod out first-degree creosote that would have taken a decade to accumulate on clay tile. Catch it early, and it’s a brush job. Let it glaze, and you’re looking at third-degree creosote that no brush touches.
- Mid-run seam separation in flex liner sections. Gelco liners ship in sections that get joined during install. If those joints aren’t properly crimped and supported, the sections can separate over time - especially in Commack chimneys with offset flues from the 1950s and 60s. We pulled a Gelco 6″ round flex aluminum liner from a Commack colonial where the homeowner complained of smoky startups. The liner had separated at a mid-run seam inside the flue. We re-crimped the joint, added a stainless draw band, and rodded out hardened creosote from the corrugations before reinstalling. The draft came back strong, and the customer avoided a $1,400 liner replacement they’d been quoted elsewhere.
- Pinhole corrosion in Gelco stainless liners venting gas appliances. This is the one most Commack homeowners don’t see coming. When a high-efficiency gas furnace or boiler vents into a Gelco stainless liner, the flue gases can produce acidic condensate. That condensate eats pinholes through the steel over time. The liner still looks fine from the top, but a camera inspection shows the damage. This shows up a lot in Commack because so many homes converted from oil to gas when National Grid expanded service into central Suffolk, leaving the original chimney in place with a liner that wasn’t matched to the new appliance.
- Kinked Gelco 5.5″ Oval Flexible Aluminum Liners at chimney offsets. Oval liners are built to fit narrow flue passages, but the shape makes them more prone to kinking at offset bends. Thermal cycling - the repeated expansion and contraction through Commack’s freeze-thaw winters - gradually collapses the oval cross-section at the bend. That reduces draft and makes the liner harder to clean properly. We find this often in Commack split-levels where a Gelco oval liner was pulled through a flue with a sharp offset at the smoke chamber.
- Termination cap wear on Gelco factory aluminum caps. The liner itself might be fine while the factory aluminum cap on top is pitted, warped, or missing its screen. Commack’s wet Atlantic-influenced winters accelerate cap wear. We often replace a worn Gelco aluminum cap with a heavier-gauge aftermarket stainless cap that outlasts the original - and that’s an upgrade, not a downgrade.
Gelco Parts & Our Repair-vs-Replace Approach
We use OEM Gelco liner sections when our suppliers have them, and we stock common Gelco sizes locally for faster turnaround on Commack jobs. But we’re also honest about when the aftermarket option is better. For terminations and caps, we often recommend heavier-gauge aftermarket stainless over the factory aluminum - the aluminum simply doesn’t hold up to Suffolk County weather the way 304 or 316 stainless does. For liner sections, we repair rather than replace whenever the metal is sound and the seam integrity can be restored. A re-crimp, a draw band, and a proper support brace cost a fraction of a new liner pull.
Here’s the honest part: not every liner needs to be replaced. If the metal is still intact, the seams can be made tight, and a camera inspection confirms the liner is still functioning, we’ll tell you to keep your money. When the metal is too far gone - pinhole corrosion that spans multiple feet, or a kink so collapsed it can’t be reshaped - replacement is the only honest answer. You’ll see the camera footage and get a plain-English verdict, every time, no exceptions. Call (631) 502-3612 for a free estimate.
Our Gelco Service Process - Step by Step
- 1
Diagnosis. We start with a visual inspection of the Gelco liner from the roof and the fireplace or appliance connection, then run a camera through the full length of the flue. This is where we catch the seam separations, pinholes, and kinks that a brush alone would miss. In Commack homes with 1960s shared-flue configurations - where the builder ran the oil-burner flue and the fireplace flue through the same clay tile liner - the camera is non-negotiable. That setup violates current code and creates serious draft and backdrafting problems.
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Cleaning. We rod out the liner with brushes sized to the Gelco diameter and profile - 6″ round, 8″ round, 5.5″ oval, or 7″ round insulated. Creosote in aluminum corrugations takes more passes than a smooth-wall liner, because the ridges hold material. We don’t rush this.
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Repair or replacement. If we find seam separation, we re-crimp and add a stainless draw band. If we find a kink at an offset, we assess whether it can be reshaped or whether a section needs to be pulled and replaced. If the metal is corroded through, we recommend a new Gelco liner or, where appropriate, an upgrade to a heavier-gauge stainless pipe.
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Verification. After the work is done, we run the camera again to confirm the liner is clear and the seams are seated. Then we do a draft test. You get the camera footage and a plain-English report of what we found and what we did.
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Warranty. Every Gelco service job is backed by our 90-Day Done Right Promise in writing. If it’s not right, one call brings Wendell back. No charges, no argument.
Gelco Products We Service & Install in Commack
We service and install the Gelco liner products most common in Commack chimneys: the 6″ Round Flexible Aluminum Liner, the 8″ Round Flexible Stainless Liner, the 5.5″ Oval Flexible Aluminum Liner, and the 7″ Round Insulated Stainless Liner. For Commack homes with wood-burning fireplaces, the 6″ aluminum is the most common in the field, and it’s the one that keeps us busiest. For oil-to-gas converted furnaces, the 8″ stainless with proper insulation is the right conversation to have. We stock common Gelco sizes and components locally, and we can source the rest through our supplier network on a short turnaround.
We Also Service These Brands
Gelco is one of several liner and chimney product lines we work with. We also service and install DuraFlex and HeatShield products, along with components from Olympia Chimney, Famco, and Copperfield. The right liner for your Commack chimney depends on the appliance, the flue dimensions, and the condition of the masonry - not on which brand we happen to stock on the truck.
FAQs - Gelco Chimney Cleaning Service in Commack
No. Top Hat Chimney is an independent Gelco service provider - we are not affiliated with or authorized by Gelco. What that means for you is straightforward: we tell you what the liner actually needs, not what a factory protocol dictates. We’ve serviced Gelco chimney systems in Commack and across Long Island for years, and our recommendations come from what we see inside chimneys, not from a manufacturer’s quota.
We use OEM Gelco liner sections when our suppliers have them in stock, and we keep common Gelco sizes on hand locally for faster Commack service. But we’re also honest about when aftermarket is better - for example, we routinely recommend heavier-gauge aftermarket stainless caps instead of factory aluminum caps because the aluminum doesn’t hold up to Suffolk County weather. The liner itself, when it’s being replaced, is where OEM matters most, because the diameter and flex profile need to match the existing install.
Because the corrugated walls of the aluminum flex liner create far more surface area than smooth clay tile, and those corrugations trap creosote at a much faster rate. The effect is more pronounced with wood stoves, because the flue gases are cooler and creosote condenses more readily. In Commack homes where a Gelco 6″ aluminum liner serves a wood stove, we often find first-degree creosote buildup in a single burning season that would have taken years to accumulate on the original clay tile. Once a year, burn or no burn. Chimneys break in the off-season too. Call (631) 502-3612 for an exact quote - estimates are free.
It depends on where the damage is and how far it extends. A single pinhole near a termination can sometimes be addressed with a stainless patch section or by replacing just the damaged portion, but pinhole corrosion from acidic condensate usually indicates a systemic problem - if there’s one pinhole, there are often more forming nearby. We decide based on what the camera shows, not on a guess. If the metal is still sound and the seams can be restored, we’ll repair. If the corrosion spans multiple feet, replacement is the only honest call.
A Level 2 inspection is the camera-based inspection we recommend whenever a Commack home has undergone a change in heating appliance - like the oil-to-gas conversions that have been so common since National Grid expanded natural gas service into central Suffolk - or whenever a chimney has experienced a weather event, a chimney fire, or a long period without professional maintenance. On a Gelco-chimney home, a Level 2 inspection includes running a camera through the full liner length to check for seam separation, pinhole corrosion, kinking at offsets, and creosote buildup in the corrugations, which is why we also offer our Chimney Cleaning & Sweep services. It also includes the accessible portions of the exterior chimney and the appliance connections.
The liner itself doesn’t need waterproofing, but the masonry chimney around it absolutely does in Commack’s climate. Central Suffolk’s freeze-thaw cycles - wet Atlantic-influenced winters with repeated crossings of the freezing point - accelerate mortar joint erosion and spalling on the aging masonry chimneys common throughout Commack. Water that penetrates the masonry can reach the liner and speed up corrosion, especially on aluminum. We apply chimney waterproofing after a cleaning and Gelco repair in Northport or Commack whenever the masonry shows moisture intrusion. Spring inspections routinely reveal winter frost damage that went unnoticed because the chimney wasn’t examined at the end of heating season.
Gelco chimney cleaning in Commack typically runs between $180 and $340, depending on the liner type and how heavily the corrugations are packed with creosote. Aluminum flex liners take longer to clean than smooth stainless or clay tile because the ridges hold material, and a liner that hasn’t been cleaned in several years will cost more than one maintained annually. Every quote is upfront - the number you hear on the phone is the number on the invoice. Call (631) 502-3612 for an exact quote, and ask about the $40 off any repair over $200 and the 10% discount for seniors and veterans.
Book Your Gelco Service in Commack, NY
If your Commack chimney has a Gelco liner, or you think it might, call Top Hat Chimney at (631) 502-3612. We’ll answer with a live person, give you a real arrival window, and send Wendell and his crew - background-checked, uniformed, and ready to show you the camera footage and a plain-English verdict. Free estimates, no trip charge inside the county, and the 90-Day Done Right Promise on every job.
Written by Wendell Pike, Owner at Top Hat Chimney, serving Commack since 1999.