Sweep & inspection
Caps & crowns
Masonry repairLevel 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.
Why Yonkers Homeowners Choose Gelco Chimney Cleaning
We provide independent Yonkers Gelco service for chimney cleaning, inspection, and repair throughout the area, working on Gelco liner kits and caps in pre-war brick row houses, Park Hill colonials, and everything in between. Since we’re not a factory-authorized shop, we recommend what actually holds up in Yonkers’ riverside humidity and freeze-thaw winters, not what a manufacturer’s spec sheet assumes. If your Gelco liner or cap needs attention, call (914) 233-3156 and we’ll give you a written price before anyone touches a brush.
Gelco makes solid entry-level chimney liners and caps. We see them constantly in Yonkers homes, and we’ve learned exactly where they succeed and where they struggle. A Gelco 6″ x 35′ liner kit installed correctly in a dry, properly capped chimney does its job fine. But Yonkers throws specific conditions at these products: riverfront salt air, humid summers that soften creosote into a sticky glaze, and winters that freeze and thaw masonry until caps shift and liners pull at their top plates. That’s where our experience matters. We know what to look for before a small Gelco issue becomes a liner replacement or a chimney fire.
Why Trust Hadley Chimney Yonkers for Your Gelco Chimney Cleaning?
Our owner, Cory Mitchell, came up through Los Angeles Trade-Technical College before bringing his trade east, and he’s spent years tearing down and rebuilding chimney systems in Yonkers’ older housing stock. He and our crew have worked on enough Gelco installations to spot problems early: the way insulation wrap separates at seams, the way galvanized cap mesh corrodes near the river, the way stainless cap screws seize after two winters. That familiarity means we don’t waste time diagnosing what we’ve already seen a dozen times.
Every Gelco job we do in Yonkers follows the same commitments we bring to our Chimney Sweep services. You get a background-checked, uniformed technician with a live arrival window, before-and-after photos from inside the flue, and a written price before work starts. Our 365-Day Done Right Promise covers every repair with a written guarantee and a free second visit if anything fails. As an independent Gelco service provider, we’re not bound by factory service restrictions, so we can be straight with you about when a Gelco part is worth keeping and when an aftermarket upgrade makes more sense for a Yonkers chimney.
Styles & brands we work with
Common Gelco Chimney Cleaning Problems We Fix in Yonkers
Here’s what we actually find when we open up Gelco installations in Yonkers chimneys:
- Insulation wrap separating at liner seams. Gelco liner kits ship with a foil-faced insulation wrap that’s meant to hold together for years. In unconditioned chimneys, especially on Yonkers’ older wood-frame homes, temperature swings break down the adhesive and the wrap pulls apart at the seams. Once that happens, the liner loses insulation value and creosote cools faster against the walls, building up thicker than it should. We remove the old wrap, clean the liner surface, and re-wrap or reline depending on how far the degradation goes.
- Galvanized cap mesh corroding near the riverfront. Gelco’s galvanized cap option is budget-friendly, but Yonkers neighborhoods within a mile or two of the Hudson get salt air that eats through that mesh in three to five years. The mesh then blocks draft instead of protecting it. We replace these with heavy-gauge stainless caps that outlast the original without costing much more up front.
- Liner pulling away from the top plate. When a Gelco liner isn’t supported with enough brackets, it settles and pulls away from the top plate at the crown. This creates a gap where exhaust can leak into the chimney chase instead of venting out. We see this regularly in Yonkers’ three-story walk-ups near Getty Square, where long liner runs put extra weight on every connection. We re-secure the liner and add proper support brackets so it stays put.
- Stainless cap screws seizing after two winters. The stainless screws on Gelco caps are fine hardware, but Yonkers’ freeze-thaw cycles and humidity corrode the threads where they meet the cap base. After two winters, they often won’t turn without stripping. We use penetrating oil and careful extraction to remove them without damaging the cap or crown, then replace with anti-seize coated hardware when we reinstall.
- Hardened creosote glazing behind the cap mesh. Just like the Park Hill colonial we worked on with a Gelco 6-inch liner untouched for four seasons: the insulation wrap had split along two seams, and creosote had turned into a hard glaze right behind the cap mesh. That’s a chimney fire waiting for a spark. We removed the cap, ran a rotary whip with a creosote-specific head, then replaced the damaged Gelco cap with stainless and re-secured everything at the top plate. The homeowner got photos of every step.
Gelco Parts & Our Repair-vs-Replace Approach
When you need a Gelco part replaced, we can source OEM components if you want exact spec. But we’re also honest with you about when an aftermarket part makes more sense in Yonkers. Gelco’s galvanized caps, for example, are inexpensive but don’t hold up to riverfront humidity the way a heavy-gauge stainless cap does. We typically stock stainless aftermarket caps and liner components locally, which means faster turnaround on common jobs without waiting on a factory shipment.
Our repair-vs-replace philosophy is simple. If a Gelco liner is torn, kinked, or has a separated seam, we usually recommend full liner replacement rather than patching. Even a small breach compromises draft and creates a carbon monoxide risk. Patching a liner sounds cheaper, but it’s a temporary fix on a component that protects your house from fire and gas exposure. If a cap is reusable and the liner is sound, we’ll tell you that too and save you the money. Call (914) 233-3156 and we’ll talk through what your specific setup needs.
Our Gelco Service Process – Step by Step
- 1
Diagnosis. We run a Level 2 camera inspection through your Gelco liner, checking seams, insulation wrap, top plate connection, and cap condition. You get photos of everything we see, including any creosote buildup behind the cap mesh.
- 2
Repair or replacement. We give you a written price before any work starts, with a clear recommendation on whether we’re cleaning, repairing, or replacing the Gelco component. No verbal ballparks that change once we’re on the roof.
- 3
Testing. After the work, we run a draft test and check every connection point. On Gelco liners, we verify the top plate is sealed and the cap sits level with proper clearance from the flue opening.
- 4
Warranty. Every repair comes with the 365-Day Done Right Promise in writing, including a free second visit if anything fails within a year. If it’s not right, we come back.
See the difference
Before
After
Before
After
Before
AfterGelco Products We Service & Install in Yonkers
We work on Gelco 4″ x 35′ and 6″ x 35′ Chimney Liner Kits, which cover most single-flue gas and oil appliance venting setups in Yonkers homes, as well as wood-burning fireplaces that need relining. We also service and replace Gelco galvanized and stainless chimney caps, the two cap options Gelco sells for standard flue sizes. When we install, we stock heavy-gauge stainless replacement caps and liner components locally so most jobs don’t wait on shipping. If you’re unsure which Gelco kit or cap you have, we can identify it during the inspection and tell you exactly what’s on your chimney.
We Also Service These Brands
Gelco is one brand we know well, but Yonkers homes carry all kinds of chimney components. We also install and service DuraFlex flexible liner systems and HeatShield ceramic repair compound, along with Olympia Chimney, Famco, and Copperfield products. When your chimney needs work, the brand matters less than whether the person on your roof knows how it actually performs in a Yonkers winter.
FAQs – Gelco Chimney Cleaning Service in Yonkers
No. We are an independent Gelco service provider, not a factory-authorized shop. What this means for you is that we’re not bound by manufacturer service restrictions, so we recommend what actually works for Yonkers homes. If a Gelco part should be replaced with something more durable, we’ll tell you that without worrying about voiding a factory relationship.
We can source genuine Gelco parts when you want exact-spec replacements. However, we often install heavy-gauge aftermarket stainless caps and liner components that outlast Gelco’s standard galvanized options, especially near the Yonkers riverfront. Before any part goes in, you’ll know exactly what it is, what it costs, and why we’re recommending it.
Most Gelco cleaning and inspection jobs in Yonkers take 60 to 90 minutes from setup to final test. Cap replacements add another 20 to 30 minutes. Full liner replacement can take a half day to a full day depending on flue height, access, and whether the old liner needs extraction first. We always give you a time estimate with your written price, and we text when we’re on the way.
We service and install Gelco 4″ x 35′ and 6″ x 35′ Chimney Liner Kits, plus Gelco galvanized and stainless chimney caps. If you have a Gelco product we didn’t list, call us. We’ve likely worked on it, and if we haven’t, we’ll tell you straight instead of pretending.
Cleaning and inspection by an independent technician does not void a manufacturer warranty. However, if we replace a Gelco part with an aftermarket equivalent, that part is no longer covered by Gelco’s warranty. That’s why we always present OEM and aftermarket options before any work, so you decide with full information. Many Yonkers homeowners choose aftermarket stainless because the Gelco galvanized options simply don’t hold up to local humidity. Your call, either way.
In Yonkers, a Gelco chimney cleaning with full inspection typically runs $180 to $340 depending on liner condition, cap accessibility, and how much creosote has built up behind the cap mesh. Gelco cap replacement adds $120 to $250 for standard stainless. Full liner replacement with a Gelco or comparable kit runs $2,500 to $4,500 depending on flue height and chimney access. Call (914) 233-3156 for an exact quote; estimates are free and we’ll show you photos before you decide anything.
Once a year, minimum. Between humid summers that turn creosote sticky and winters that freeze and thaw the cap base, a Gelco cap left in place for multiple seasons becomes a spot where creosote glazes behind the mesh and blocks draft. Annual removal during your sweep lets us brush out what’s accumulated and check cap screws before they seize. If your fireplace heavy use or you live near the riverfront, twice a year isn’t unreasonable. Call (914) 233-3156 to book Gelco Chimney Cleaning in City Island, NY or nearby Yonkers areas.
Yes. If the liner passes camera inspection and draft testing, there’s no reason to replace it. We swap the cap, check the top plate seal, and you’re done. This is one of the most common Gelco jobs we do in Yonkers, since galvanized caps fail faster than liners in our humidity.
It can be. Peeling insulation wrap reduces the liner’s ability to hold heat, which lets creosote cool and accumulate faster inside the flue. That buildup is what becomes a chimney fire risk. If you see insulation wrap pulling away from your Gelco liner, call (914) 233-3156 for an inspection. We’ll show you exactly what’s happening with camera photos before recommending anything.
Somewhat. Flexible stainless liners like Gelco need a rotary whip or a brush sized specifically for the liner’s diameter so you don’t tear the corrugations. Rigid metal chimneys can take different tools. We also watch the seams and top plate connections more carefully on Gelco installations because that’s where Yonkers freeze-thaw cycles and liner settling cause the most failures.
Yes, if the cap itself is still sound. When we repair or rebuild a chimney crown, we remove the Gelco cap, do the masonry work, then reinstall the cap with new anchors and anti-seize on the screws. If the cap mesh is corroded or the cap base is warped, it makes sense to replace it while the crown is open. We’ll tell you which applies once we see it up close.
Book Your Gelco Service in Yonkers, NY
If you have a Gelco liner or cap in a Yonkers chimney, don’t wait for creosote to build up or the cap mesh to clog. Call (914) 233-3156 for a free estimate. We’ll inspect, send photos, and give you a written price before any work starts. If I wouldn’t leave it on my own fireplace, I’m not leaving it on yours.
Written by Cory Mitchell, Owner at Hadley Chimney Yonkers, serving Yonkers since 2003.