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 Installation: The Deer Park Owner’s Guide
Gelco chimney cap installation in Deer Park typically runs $275 to $525 installed, and we almost always have the common sizes on the truck. If your cap is rusted through, missing its spark screen, or you’re finding chunks of it in the yard after a storm, that’s usually where the story starts. Most folks in Deer Park discover the problem when rainwater starts running down the flue, or when a squirrel sets up housekeeping for the winter. The fix is usually straightforward: remove the old cap, measure the flue tile, match it to the right Gelco or comparable cap, and have it secured before the next rain. Wendell Pike has been doing this swap on Long Island rooftops long enough to know which caps hold up here and which ones don’t make it two seasons.
Which Gelco Models This Applies To
Gelco makes a few different cap lines, and the model matters when you’re matching one to your flue. The most common we see in Deer Park are the Gelco snap-on caps designed for standard square or rectangular flue tiles, and the Gelco top-mount models that fasten to the crown with masonry screws. The key measurement is the outside dimensions of your flue tile, not the inside opening. A cap that’s sized for the inside diameter will practically fall into the flue, and a cap that’s too big won’t seat. Gelco identifies their caps by these outside tile dimensions, stamped on the underside of most models. If the stamp is gone or unreadable, we measure the tile ourselves with a tape, and we don’t guess. When it comes to replacement parts, an OEM Gelco cap is the right call if you’re replacing one piece and want a visual match. But we’re also honest about this: a heavy-gauge stainless cap from another reputable line often outlasts the original in Long Island salt air, and it can cost less. We stock both, and we’ll show you the differences before you spend a dime. Top Hat Chimney is an independent service provider; we’re not affiliated with Gelco, but we install and service their products every week across Deer Park.
Signs Your Gelco Chimney Cap Installation Is Failing
- Water in the firebox after heavy rain. The cap’s top is rusted through or the mounting has pulled loose, letting rain run straight down the flue. In Deer Park, a northeast blow off the Sound will find that leak fast.
- Birds or squirrels in the chimney. The spark screen or mesh sides have corroded away. Once the screen fails, a raccoon or squirrel doesn’t need much of an opening to move in.
- Chunks of rusted metal beside the chimney or in the yard. The cap has reached the end of its life and is literally shedding. If it’s dropping pieces, the rest of the cap isn’t far behind.
- Visible rust the first season. That’s a galvanized cap in salt air. The plating has failed, and rust spreads fast once it starts. You’re not looking at a ten-year part anymore.
- Cap sits crooked or bangs when the wind blows. The mounting screws have worked loose or the flue tile itself has shifted. A loose cap lets rain in around the gap and eventually abrades the tile edges.
Replacement Cost & What’s Included
In Deer Park, a Gelco or comparable stainless steel cap installed by us runs from $275 on the low end for a standard single-flue tile up to about $525 for multi-flue setups, oversized tiles, or caps that need custom sizing. The spread comes down to three things: the flue tile dimensions, whether the old cap is rusted into place and needs careful removal, and whether the crown needs patching where the old mounting screws were. The price we quote includes the cap itself, removal and disposal of the old one, mounting hardware, and cleanup. Every job is covered by our 90-Day Done Right Promise; if the cap comes loose or leaks, one call brings Wendell back and we make it right. You’ll also get the $40 off any repair over $200 standing offer, which brings the job in at a better price than any phone quote will tell you. Call (631) 214-2108 for a free estimate; we don’t give you one number over the phone and another at the door.
DIY or Call Us?
You can inspect your cap from the ground with binoculars – that’s safe and smart, and it’ll tell you if you even have a problem worth acting on. What’s not safe is getting a ladder out and climbing onto a Deer Park roof with a drill, a box of Tapcons, and a cap under your arm. A flue cap replacement means working at height, usually on a slope, often with a chimney chase below you. One wrong step is a hospital trip, and that’s before we talk about the damage a bad mount does to your crown. If it doesn’t need doing, I’ll tell you that too. But if the cap’s gone, the repair is a two-hour job for a crew that does it every week, and it’s a lifelong worry if it’s done wrong. Give us a call at (631) 214-2108 and we’ll come look at it, no trip charge inside the county.
FAQs
A stainless steel cap should last 10 to 15 years in Deer Park’s salt air, while a galvanized cap often rusts through in 3 to 5 years. If you’re replacing a Gelco cap, consider going stainless for the next one; the price difference is modest and the lifespan doubles. Call (631) 214-2108 and we’ll show you both options before you commit.
In most cases, no. Once the rust has eaten through the top or the mesh, patching buys you a season at best, and a failed cap lets water and animals into your flue the whole time. If just a mounting screw has stripped out, we can often reseat the cap with a larger anchor and save it; come have us look at it before you buy a new one.
The swap itself takes 30 to 45 minutes, from putting the ladder up to sweeping the rooftop clean. Add a little time if the old cap is rusted into place or the crown needs patching. Wendell works on Deer Park rooftops all week; he’ll give you a real arrival window and call if it slips.
We stock the common Gelco-compatible sizes on the truck, and we can order odd sizes or custom multi-flue caps within a few days. We also carry quality caps from other lines including DuraFlex and HeatShield, so if a different brand serves your flue better, we’ll say so plainly. Stop guessing at an online order; call (631) 214-2108 and we’ll match the cap to your tile.
Written by Wendell Pike, Owner, Top Hat Chimney - Deer Park, NY at Top Hat Chimney, serving Deer Park and nearby areas.





Before
After
Before
After
Before
After