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
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Before
AfterGelco Chimney Cap Installation: The Greenwich Owner’s Guide
We install Gelco chimney caps and Gelco-compatible cap systems in Greenwich, CT, with most installations running $325 to $575 fully installed, including the cap, mounting hardware, and a camera-verified fit check. Most homes we serve in Greenwich already have a Gelco cap that’s doing its job; the install call usually comes when a cap has rusted through at the seam, lifted in a nor’easter, or been dented by a falling branch. We stock common Gelco sizes on the truck and can match a failed cap to a replacement the same visit.
Here’s the pattern we see in Greenwich: the cap doesn’t fail all at once. It works fine for years, then one fall you notice squirrels in the attic again, or water staining near the flue, or the telltale sound of the cap rocking in a November wind. By the time it’s visible from the ground, the cap has usually been compromised for a while. That’s why we always run a camera down the flue when replacing a cap; the cap is the first line of defense, and what it failed to stop is often still in the chimney.
Key takeaways:
- Typical Gelco cap installation in Greenwich: $325-$575, parts and labor included
- We stock Gelco-compatible stainless and galvanized caps in common flue sizes
- Every install includes a camera-scan record of the flue before and after
- Written price before work starts, always, under the Haven Standard
Which Gelco Models This Applies To
Gelco builds caps for both single-flue and multi-flue chimneys, with the most common Greenwich installs being the standard single-flue in 8″×8″, 8″×13″, and 13″×13″ tile sizes, and the larger multi-flue models that span an entire crown. If you know your stencil or part number, we can match it exactly; if not, we measure the outside tile dimensions and the crown height on-site. Gelco caps sit differently than generic box-store caps. They’re built around the flue tile itself, not just dropped on top, so the tile measurement matters more than the brand stamp. A cap sized for the wrong tile will wobble, and a wobbling cap in Greenwich eventually finds its way into your neighbor’s rhododendrons.
We are an independent service provider, not affiliated with Gelco, but we specify and install their caps regularly because the gauge of steel and the seam construction hold up in Fairfield County weather. If you’d rather go with an aftermarket equivalent, we can price that too; many aftermarket caps use a thinner gauge and cheaper hardware. For coastal Greenwich homes, those near Long Island Sound, we typically recommend stainless over galvanized. Salt air subtracts about five years from galvanized, regardless of brand.
One more compatibility note: if your Gelco cap is a multi-flue unit with a hinged lid or a spark arrestor screen, measure the crown, not just the flue. The crown width determines whether the cap sits flush or needs mounting tabs. We’ve seen multi-flue caps ordered from photos that overhang a Greenwich stone crown by two inches and catch wind like a sail.
Signs Your Gelco Chimney Cap Installation Is Failing
- Water stains on the ceiling near the chimney. This almost always means the cap is no longer shedding rain away from the flue opening. In Greenwich colonials, this shows up first in upstairs bedrooms on the chimney side of the house.
- Squirrel or bird noise in the chimney. A Gelco cap with an intact screen keeps animals out. Once the mesh tears or the cap lifts, gray squirrels in Greenwich will find it within a season. They’re persistent, and they return.
- Audible metal rocking or scraping in high wind. When the mounting bracket loosens or a seam splits, the cap moves. This is more visible than dangerous in most cases, but the movement accelerates wear on the flue tile beneath it.
- Rust streaks on the chimney crown. Galvanized caps shed rust as the zinc layer breaks down. In Greenwich, this typically starts around year 8 to 12, sooner near the water. The cap is still there; it’s just not protecting much anymore.
- Debris in the firebox after a storm. Leaves, twigs, or water down the flue mean the cap’s screen is compromised or the cap has shifted off-center. If you find this after a Greenwich nor’easter, don’t wait for the chimney to dry out on its own.
BeforeAfterReplacement Cost & What’s Included
Most Gelco cap installations in Greenwich run between $325 and $575. A straightforward single-flue stainless cap with standard mounting is at the lower end. A multi-flue cap, a cap on a steeper roof, or an install that requires crown repair or a custom-fitting bracket lands at the upper end. We write the price before we touch the chimney, and the written quote included in your paperwork is the price you pay, not an estimate that changes once the ladder goes up. That’s Haven Standard Clause 1: written price, written scope, written warranty.
Every Gelco cap install includes the cap itself, the correct mounting hardware for your crown, and the labor. We also document it. Camera goes down the flue before the cap goes on, and we photograph the finished install from the roof. You get the photo record before the tech leaves your driveway. That’s Clause 4 of the Haven Standard, the practice we’ve kept on every job since 2009. Corrine Halstead, who runs our Greenwich team, won’t sign off on an install she can’t show you from three angles.
| Scope | Typical Installed Price |
|---|---|
| Single-flue stainless Gelco-style cap | $325-$425 |
| Single-flue galvanized Gelco-style cap | $275-$350 |
| Multi-flue stainless cap, standard crown | $450-$575 |
| Multi-flue with crown repair or custom bracket | $525-$650 |
Every install is covered by our 365-Day Done Right Promise. If the cap fails or the fit isn’t right within a year of the install date, we make it right at no charge. The camera doesn’t guess. Neither do we.
DIY or Call Us?
You can safely check whether your Gelco cap is visibly damaged from the ground using binoculars. If the cap is askew, the screen is torn, or you can see daylight through a seam, you’ve identified the problem. What you shouldn’t do is climb a Greenwich roof with a replacement cap under one arm. Our installers work on ladders rated for the pitch of these roofs and wear harnesses on slopes over 6/12, which includes a healthy share of older Greenwich homes. Falls from chimney height are the most preventable injury in this trade, and most DIY cap installations that go wrong in Fairfield County go wrong at the ladder, not at the cap.
Even if you get up there safely, the install has a specific order of operations: removing the failed cap without damaging the crown, matching the tile dimensions, seating the new cap level so wind doesn’t catch it, and securing it so a coastal storm won’t move it. If you’re comfortable with that scope, the aftermarket caps available at Greenwich hardware stores work as a stopgap. If you want it done once, with a documented photo record and a written warranty, call us at (516) 399-5497 and we’ll schedule a visit.
FAQs
A Gelco stainless cap typically lasts 15 to 20 years in Fairfield County, while galvanized runs 8 to 12 years, less if your chimney faces the Sound or catches driving rain. The failure point is usually the seam, not the cap surface itself. If your cap is past that range and showing rust or movement, it’s replacement time, not repair time. Call (516) 399-5497 for an exact quote.
In most cases, no. Once a seam splits or the screen tears, the cap’s protection is gone, and patching a cap in Greenwich just buys you a year before the same failure returns. The exception is a loose mounting bracket, which can sometimes be reseated if the cap itself is sound. We’ll tell you plainly which situation you have after we look at it.
The typical install takes 45 to 90 minutes from ladder-up to finished photo record. Most Greenwich homeowners have it done between breakfast and lunch. A multi-flue cap or one requiring crown prep adds time; we’ll scope that in the written quote before scheduling.
Yes, we carry common Gelco-style stainless and galvanized caps in 8″×8″, 8″×13″, 13″×13″, and standard multi-flue sizes. If your measurements fall outside what’s on the truck, we can source the correct size, often the same week. We also stock parts from DuraFlex and HeatShield for liner and repair work.
Get a Written Price for Your Gelco Cap in Greenwich
If your Gelco cap is rusting through, rocking, or letting water into the flue, the fix starts with one visit, not an open-ended estimate. You’ll get a written price before we start, a camera record when we finish, and a one-year guarantee on the work. Serving Greenwich and nearby areas with background-checked, uniformed installers and 24/7 live phone support. Call (516) 399-5497 today for a free estimate.
Written by Corrine Halstead, Owner, Level Two Chimney Greenwich at Level Two Chimney Greenwich, serving Greenwich and nearby areas.