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.
Gelco Chimney Cap & Crown in New York City: What to Know First
Gelco chimney cap and crown work in New York City typically runs $340-$1,400 depending on whether we’re replacing a cap, building a new crown, or doing a full crown-and-cap combo on a multi-flue stack. Most Gelco jobs are completed in one visit, and you’ll have a written price before anyone touches the roof. This page is for homeowners with Gelco products who’ve noticed rust streaks, cracked crown mortar, or water in the firebox and want the actual fix, not a sales pitch. Call (980) 580-8641 and we’ll schedule the inspection.
How Gelco Products Fail - and How We Fix Them
- Classic Series cap screen burnout at the weld points. The Gelco Classic line uses a standard stainless mesh that holds up fine for a decade, but in New York City we see the corner welds fail first, especially on caps facing the prevailing wind off the Hudson. Once one weld pops, the mesh sags and animals get in. Our fix is a full cap replacement with a reinforced weld pattern, not a patch. Patching a burned weld just moves the failure six inches over.
- Deluxe Series lid warping from thermal cycling. The Gelco Deluxe hoods are heavier gauge, but New York City rooftops get brutal temperature swings: 95°F in July, 10°F in January. The lid expands and contracts enough that the center screws back out over time. We see it on about one in five Deluxe caps we inspect. We replace the lid and reseat the fasteners with thread locker, or swap the whole unit if the channels are scored.
- Custom Gelco cap sizing errors from original installation. Half the Gelco caps we’re called out to fix in New York City were ordered one size too small by the previous installer. A cap that doesn’t overhang the flue tile by at least an inch lets rain drive in sideways. We measure the actual flue dimensions, not the nominal size stamped on the old cap, and order accordingly.
- Crown wash deterioration under Gelco cap legs. Gelco caps sit on the crown, and if the original crown wash was poured too thin, the weight of the cap concentrates stress at the leg points. We see star cracks radiating from cap legs on older brownstones and prewar buildings across the five boroughs. The fix is a new crown at proper thickness, then the cap gets reseated on fresh mortar beds.
- Multi-family roofs with mismatched Gelco caps. We regularly find buildings in New York City where the original Gelco cap on flue A was replaced years ago with a knockoff on flue B, and now flue B is pulling water. Imitation caps use lighter mesh and thinner lids. We restore the run with genuine Gelco or a spec-matched equivalent and document every piece in the photo record.
Our Gelco Chimney Cap & Crown Process

Here’s how a Gelco job goes at Emberly Chimney Cleaners, from first call to final photo:
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You call, a person answers. We ask what you’re seeing, not to sell you, but to know what the tech should expect on the roof. We book a window that fits your schedule.
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Camera inspection before any recommendation. The tech runs the camera down the flue and photographs the cap and crown from the roof. You see everything we see, explained in plain terms. Clause 4 of the Haven Standard makes this standard on every visit, and it has been since 2009.
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Written scope and price. You get the exact work, the exact parts, and the exact number in writing before anything is touched. No verbal “trust me” pricing, ever.
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The repair or replacement. We use OEM Gelco parts where they still carry the warranty you want, and quality spec-matched aftermarket parts where the OEM piece is discontinued or overpriced for what it is. We tell you which is which and why.
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Post-work test. For caps, we test the draft and check for any smoke rollback. For crowns, we water-test the surface to confirm it sheds properly.
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You get the photo record. Before and after images, the written warranty on the parts and workmanship, and the 365-Day Done Right Promise stamped on the job. If it’s not done right, we make it right.
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AfterWhat Gelco Chimney Cap & Crown Costs in New York City
Here’s what we quote most often for Gelco work in New York City, based on the past several hundred jobs:
| Job | Typical Range |
|---|---|
| Gelco Classic cap replacement (single flue) | $340-$590 |
| Gelco Deluxe cap replacement (single flue) | $480-$750 |
| Multi-flue Gelco cap, custom size | $700-$1,200 |
| Crown repair (partial patch) | $300-$550 |
| Full crown rebuild with cap reset | $700-$1,400 |
What moves the number: roof access difficulty, flue size, whether the crown needs a full tear-out or a partial patch, and whether you want OEM Gelco or a spec-matched alternative. Walk-ups with narrow roof hatches in older New York City buildings add labor. Every quote is written, line-itemed, and delivered before we start. Call (980) 580-8641 for your free estimate.
Why New York City Homeowners Call Emberly Chimney Cleaners for Gelco Work

We inspect the way you’d want to be inspected: with a camera, not a flashlight. Since 2009, we’ve completed over 38,000 chimney inspections and cleanings, every single one with a written price before work started and a documented record when it was done. Our technicians are background-checked and uniformed, and their license information is on every page. When a Gelco cap is too far gone, we don’t improvise. We source through our network using Gelco, DuraFlex, HeatShield, Olympia Chimney, Famco, and Copperfield materials, which keeps prices honest. Live phone support runs 24/7. And bring us any competitor’s written estimate; we’ll give you a free second opinion on it.
FAQs
No. We are an independent Gelco service provider in New York City and are not affiliated with or authorized by Gelco. What that means for you: we’re free to tell you when a Gelco OEM part is worth the money and when a quality aftermarket equivalent does the same job for less. Nobody at Gelco signs off on our recommendations, and that’s how it should be.
No, replacing a Gelco cap with a properly sized, spec-matched cap does not void any existing warranty on the chimney structure or liner. Where your Gelco cap itself is still under warranty, we’ll walk you through what Gelco needs for a claim: photos, measurements, and the original purchase record if you have it. We document everything so you have what you need either way.
Yes. We measure the actual flue dimensions and match the material gauge, lid overhang, and mesh size. If you have a matched run of Gelco caps and one needs replacing, we’ll spec the replacement so it doesn’t look like a patch job. If the original was custom-built to the flue, we’ll order custom again rather than forcing a stock size that’s wrong.
Most Gelco cap replacements and crown repairs are completed in one visit, typically within a week of inspections depending on part availability. Common Gelco sizes are stocked locally; oddball multi-flue customs take longer. We’ll tell you the lead time in the written quote. Call (980) 580-8641 and we’ll pin down a date.
The 365-Day Done Right Promise covers it. If the cap or crown work we did isn’t right within a year, we make it right at no cost to you. That promise is stamped on every job we do in New York City under the Haven Standard, including Gelco work.
Written by Corrine Halstead, Owner, Emberly Chimney Cleaners at Emberly Chimney Cleaners, serving New York City and nearby areas.





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