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
After
Before
AfterGelco Damper Repair: The Hempstead Owner’s Guide
We stock and install Gelco damper repair components across Hempstead, with most replacements running between $340 and $620 installed depending on your existing collar size and whether the cable assembly needs replacing too. You’ll usually get a same-week appointment, and if we have the right part on the truck, it’s a one-trip job. Most Hempstead homeowners discover the problem the same way: the lever at the fireplace suddenly spins with no resistance, or the damper plate stays shut no matter how hard you pull.
Key Takeaways
- Gelco dampers fail most often at the cable anchor point or the pivot weld, not the plate itself
- OEM Gelco parts are worth the extra cost on fireplaces you use weekly; aftermarket equivalents work fine on occasional-use fireplaces
- NY humidity and salt air from the coast accelerate rust on exposed damper hardware
- We carry common Gelco sizes on the truck; odd sizes take 3 to 5 business days to source
Which Gelco Models This Applies To
Gelco makes two damper lines that show up constantly in Hempstead homes: the Top-Sealing series (the round or oval plate that sits at the flue top, opened by a cable that runs down the flue) and the older Throat-Mount series that sits just above the firebox. Both use a stainless cable, but the Top-Sealing line is the one that keeps us busy in Nassau County. Those cables stretch over time, fray at the pulley, and eventually snap at the lever mount.
The part you need depends on one measurement: the inside diameter of your flue tile, measured at the top. If you can reach the damper, look for a stamped number on the cable housing bracket. No stamp? Measure the flue opening. Gelco sizes run in 1/2-inch increments from 6 inches up to 13 inches for round, with oval equivalents for rectangular flues. Here’s the gotcha most people miss: the mounting collar bolts to the flue tile, and Hempstead’s older masonry chimneys often have irregular tile openings. You can measure 8 inches on one axis and 8-1/2 on the other, and the standard 8-inch collar will not seat. That’s when we fabricate a shim plate or go with a custom-fit aftermarket collar.
On the OEM versus aftermarket question: Gelco’s original cable assemblies use a coated stainless cable that resists the damp, salty air we get here on Long Island. The cheaper aftermarket cables are uncoated and will rust within two seasons. For the damper plate itself, quality aftermarket stainless plates hold up fine. For the cable, spend the extra and get the real Gelco part. If you use your fireplace more than a dozen times a season, it pays for itself in not having to call us back in two years.
Top Hat Chimney is an independent service provider. We’re not affiliated with Gelco, but we stock their parts because they’re what Hempstead fireplaces need.
Signs Your Gelco Damper Repair Is Failing
- The lever spins freely with no resistance. This is almost always a snapped cable at the lever mount or a detached cable from the damper plate. The damper is still up there, but you have no control over it anymore.
- The damper won’t stay open, even when you lock the lever. The detent mechanism in the lever bracket has worn. The spring-loaded pins get rounded off after years of use, and the lever slips back to closed as soon as you let go.
- You smell smoke backing into the room on windy days. A Gelco top-sealing damper that won’t fully open acts like a partial blockage. Wind pressure hits the half-open plate and pushes smoke down instead of letting it rise.
- The cable pull feels gritty or jerky, like sand is in the track. Soot and creosote work their way into the cable housing over time. The cable binds, then stretches, then fails. Catching it at the gritty stage usually means a cable lube and adjustment instead of a full replacement.
- You can hear metal rattling at the chimney top when the wind blows. This is the damper plate banging around because the cable is slack or snapped. The plate is loose at the top of the flue, and every windstorm is wearing the hinge points.
Replacement Cost & What’s Included
Here’s what Gelco damper work costs in Hempstead right now:
| Job | Typical Installed Price |
|---|---|
| Cable replacement only (OEM Gelco cable) | $180 to $280 |
| Complete damper assembly replacement, standard round (6-9 inch) | $340 to $480 |
| Complete damper assembly replacement, large or oval (10-13 inch) | $450 to $620 |
| Custom shim plate for irregular flue opening | Add $60 to $90 |
The spread comes down to roof access and flue condition. A second-story chimney on a steep pitch takes longer and costs more than a single-story walk-up in a Hempstead ranch. If your flue tile is cracked or spalling, we’ll tell you before we install anything, because mounting a new damper to a failing tile is a waste of your money.
Every Gelco install includes the part, the labor, a camera check of the completed fit, and our 90-Day Done Right Promise in writing. The number Wendell gives you before the job is the number on the invoice. Period.
DIY or Call Us?
There are two things you can safely check yourself. First, confirm the lever is actually failing and not just loose at the bracket. A hex key on the bracket screws takes two minutes. Second, confirm the flue is clear of any obvious obstruction if you can see down from the roof, but be honest about your ladder comfort and roof pitch. A lot of Hempstead roofs are steep enough that we’d rather you stay on the ground.
The DIY version of this repair goes wrong in two ways. The first is the cable routing: the Gelco Top-Sealing system runs the cable through a series of pulleys, and if you get the cable crossed or the tension wrong, the plate won’t seat fully and you’ve created a new problem. The second is roof work itself. Standing on a wet-asphalt shingle roof while pulling cable through a flue is how people end up in the ER. This is the part of the job where experience matters, and the part you should not learn from a YouTube video.
Call (516) 963-1068 before you start any of this yourself. Wendell will tell you over the phone if it sounds like a cable, a plate, or a flue problem, before anyone has to climb on a roof.
FAQs
In Hempstead’s coastal climate, we see Gelco Top-Sealing dampers last 10 to 15 years if they’re swept annually and the cable is kept adjusted. Salt air is the biggest shortener: it attacks the cable at the roof line and at the lever, and those are the two points that fail first. Throat-mount dampers, being fully inside the flue, last longer, often 20 years or better. The plate itself rarely fails; it’s almost always hardware.
If we didn’t install it and you’re unsure how old it is, we can usually estimate it from the hardware style. Call (516) 963-1068 and we’ll set up a free estimate.
Yes, and more often than you’d think. If the plate is sound and the hinge pins aren’t wallowed out, a cable replacement plus bracket adjustment gets you years more service, typically for $180 to $280 installed. We will not recommend a repair if the plate has rust-through or the hinge points are worn beyond adjustment. If it doesn’t need doing, we’ll tell you.
Unsure which way your damper is trending? Call (516) 963-1068 and describe what you’re seeing, we’ll give you a straight read.
A standard cable replacement is 45 minutes to an hour. A full damper assembly replacement on a standard round flue is 90 minutes to two hours from setup to cleanup. Odd shapes, steep roofs, and chimney caps that need removal all add time, but most Gelco damper work in Hempstead is done in a single visit.
Need it scheduled around work? Call (516) 963-1068.
We stock the common Gelco sizes on the truck: 6-inch through 9-inch round cable assemblies, standard lever kits, and replacement plates for the most common Top-Sealing models. Larger ovals and custom-fit collars take 3 to 5 business days from our supplier. If we have the part when we arrive, it gets installed that visit. If we don’t, we tell you before anyone starts work so you know exactly when it’ll be done and what it’ll cost.
Want to know if your size is on the truck? Call (516) 963-1068 with your flue measurement and we’ll check.
Call Before You Climb
If your Gelco damper lever is spinning freely or your fire’s smoking into the room, call us at (516) 963-1068. We’ll ask a few questions over the phone, give you an honest read on what it’s likely to be, and get you on the schedule before burning season kicks in. Wendell and his crew serve Hempstead, Uniondale, Garden City, and the rest of Nassau County, and we publish our price before the job starts, not after. If it doesn’t need doing, Wendell will tell you. That’s how it’s been since 1999.
Written by Wendell Pike, Owner, Top Hat Chimney, serving Hempstead and nearby areas.