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 Chimney Cap Installation: The New City Owner’s Guide
A Gelco chimney cap installed by our team in New City typically runs between $380 and $720 depending on flue size, cap style, and whether the flue needs leveling or a new base. We stock Gelco’s most common stainless-steel models on our trucks and can usually measure, match, and install in a single visit. Most New City homeowners discover their cap has failed during the first hard rain of fall, when water starts showing up in the firebox or rust stains appear on the firebrick.
Which Gelco Models This Applies To
Gelco caps break down into three main series you’ll see around New City: the standard single-flue line (SC series), multi-flue models (MC series), and the band-around-brick units for exterior chimneys common in the split-levels near Veterans Memorial Park. The SC-8, SC-10, and SC-13 cover most masonry flues in this market, with the number indicating the flue opening dimension in inches. Multi-flue models get sized by overall chimney crown dimensions, not individual flue count.
To identify what you’ve got, look for the stamped Gelco logo on the mesh screen frame, usually visible from ground level with binoculars. If the cap’s already missing or too rusted to read, we measure the flue tile opening and the crown overhang. OEM Gelco caps carry a 20-year stainless warranty, but we’ve had excellent results with Gelco-spec aftermarket equivalents from Copperfield for homeowners who want the same gauge mesh and lid pitch at a lower price point. The catch: some aftermarket lids use 24-gauge steel instead of Gelco’s 22-gauge, which matters in New City’s freeze-thaw cycles. We only install caps that match or exceed the original spec.
Signs Your Gelco Chimney Cap Is Failing
- Water in the firebox after rain. The lid has warped or the seam between lid and screen frame has opened, letting runoff drip straight down the flue. In New City’s wet springs, this shows up fast and gets worse once the mesh starts sagging.
- Rust streaks down the chimney face or on the firebrick. Galvanized caps in this climate typically fail at 8 to 12 years. Once rust blooms, the metal is thinning from the inside out, and the cap is living on borrowed time.
- Mesh screen pulling away from the frame or clogged solid with creosote. This blocks draft and turns the cap into a soot trap. We’ve pulled screens in New City homes where the buildup was so thick you couldn’t pass a pencil through.
- Cap tilted, shifted, or missing entirely after a windstorm. The base clamps or masonry anchors have corroded or the flue tile lip they grip has spalled. A cap sitting crooked is a cap that’s not keeping water out.
- Birds or squirrels audible in the flue. The mesh has corroded through at a seam or a corner. Once animals get in, they bring nesting material that can block the flue and create a real fire hazard.
Replacement Cost & What’s Included
For New City homes, here’s how Gelco chimney cap installation typically breaks down:
| Scope | Price Range |
|---|---|
| Single-flue Gelco cap, standard install (flue in good condition) | $380 - $520 |
| Single-flue Gelco cap with flue tile leveling or minor spall repair | $480 - $620 |
| Multi-flue Gelco cap, custom-sized | $580 - $720 |
| Additional masonry seal or crown touch-up | $120 - $240 |
The range depends on three things: cap size and series, whether we need to fabricate a custom base adapter, and the condition of the flue tile edge the cap mounts to. Our price includes the cap, stainless fasteners, removal and disposal of the old unit, and installation with a level check. Every cap we put on carries our 90-Day Done Right Promise in writing. The number on the estimate is the number on the invoice.
DIY or Call Us?
Here’s what you can safely check yourself: from the ground, confirm the cap is seated square and the mesh isn’t visibly damaged. Look for rust streaks on the chimney exterior after rain. That’s about where safe homeowner inspection ends.
Getting on the roof to measure, remove, and replace a chimney cap involves working at height on a pitched surface, often near the edge, with tools and a metal cap that catches wind like a sail. The flue tile lip can be brittle and hidden under old caulk or sealant. We’ve seen DIY attempts where the flue tile cracked, the new cap blew off the next week because the base wasn’t seated right, or the homeowner measured the outside of the flue instead of the inside opening and bought the wrong size entirely. We’re not saying this to scare you. We’re saying it because we’ve been called to fix the aftermath. If it’s not right, we don’t leave until it is. Call (845) 599-0930 and we’ll measure it properly, match the Gelco series, and install it so it stays put.
FAQs
A stainless-steel Gelco cap typically lasts 15 to 20 years in Rockland County’s climate, though galvanized versions often fail at 8 to 12 years due to our wet winters and freeze-thaw cycling. The mesh screen usually shows stress first at the weld points. Call (845) 599-0930 for a free inspection if you’re unsure of your cap’s age or condition.
Minor issues like a loose screw or small mesh tear can sometimes be addressed, but once the lid has warped or the frame has rusted through, repair costs approach replacement and won’t carry a warranty. We document what we find with camera photos so you can see exactly what we’re seeing. Call (845) 599-0930 and we’ll give you an honest read on repair versus replace.
Most Gelco cap replacements in New City take 45 minutes to 90 minutes from ladder set to cleanup, assuming the flue tile is sound and we have the right model on the truck. Multi-flue or custom-base jobs can run longer. We book enough time so we’re not rushing, and we don’t leave until the cap is level, secure, and passing a draft check.
We stock the SC-series single-flue models and common multi-flue sizes on our service trucks, and we keep additional inventory at our shop for New City calls. If you have an unusual size or the older Gelco band-around-brick style, we may need a day to pull it in. Either way, we’ll measure first so we order exactly once. Call (845) 599-0930 to schedule.
Written by Russell Haines, Owner, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving New City and nearby areas.