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
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Before
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Before
AfterGelco Chimney Cap & Crown in Denton: What to Know First
We provide independent Gelco chimney cap and crown service in Denton, typically turning cap replacements around in one visit and crown repairs in one to two days. Every job starts with a camera-scan inspection, a written price you approve before we touch anything, and a photo record you keep. Gelco caps and crowns hold up well in North Texas sun, but the galvanized steel lines eventually show rust at the weld seams, and the precast concrete crowns on older Gelco installs often crack where the flue meets the wash. If you’re seeing water stains on your firebox ceiling or hearing metal rattle in a windstorm, the cap or crown is the first place we look. Call us at (940) 373-6912 for a free estimate.
How Gelco Products Fail - and How We Fix Them
- Gelco Model C stainless single-flue caps: The mesh sides on the C-series trap pollen and cottonwood debris from Denton’s spring windstorms, and when homeowners pressure-wash them from below, water drives rust into the corner welds. We remove the cap, media-blast the seam corrosion, and either weld-repair or replace with a Gelco-compatible cap from our Haven buying network. The camera goes down the flue before we reinstall - Clause 4 of the Haven Standard requires it.
- Gelco galvanized multi-flue caps (Model M line): The galvanized coating on M-series caps thins at the drip edge after seven to ten years of Denton UV exposure. Once the zinc layer fails, the underlying steel flakes in sheets. We catch this during routine sweeps because the rust particles wash down onto the smoke shelf. Our fix is a full M-series replacement with stainless steel, or a quality aftermarket multi-flue from Olympia Chimney if the homeowner wants a different mesh density.
- Gelco precast crown assemblies on 1990s builds: These were poured with a high water-to-cement ratio that spalls (surface crumbles) when water freezes in the pores. Denton doesn’t get many hard freezes, but the thermal swing from 70-degree afternoons to 30-degree January nights is enough. We grind back the loose material, apply a bonded crown coat, and slope the wash to shed water toward the drip edge - not back toward the brick.
- Gelco chase cover retrofits: When a Gelco cap is mounted to a factory-built chase cover, the screws often back out as the galvanized steel expands and contracts. The gap pulls sideways rain into the chase. We find stripped screw holes regularly in the Oakmont and Southridge neighborhoods, where these assemblies went in during the 2005-2012 building boom. Our repair is helicoil threading or a new chase cover with properly sized expansion gaps.
- Gelco wind-load failures on tall flues: The Model C and Model L caps use a set-screw mounting band that loosens when the flue tile itself has hairline cracks from thermal shock. The cap tilts, the mesh gaps, and squirrels move in. We don’t just tighten the band - we camera the flue tile to confirm it’s sound, then install a Gelco-compatible base plate that distributes clamping force across four points instead of two.
Our Gelco Chimney Cap & Crown Process
- 1
Call and schedule. A live person answers, 24/7. We book a window, text you when the tech is en route, and send a named, background-checked technician.
- 2
Camera-scan inspection. We run the camera down the flue before touching the cap or crown. You see what we see - spalling, cracks, rust streaks, animal debris. The camera doesn’t guess - and neither do I.
- 3
Written price and scope. We deliver a fixed price, a written scope of work, and a written warranty before any tools come out. Haven Standard Clause 1: have it in writing.
- 4
Parts decision. If your cap or crown is repairable, we say so. If it needs replacement, we source Gelco OEM or a compatible aftermarket part through our Haven buying network - DuraFlex, Olympia Chimney, or Famco - and explain the trade-off in warranty coverage and price.
- 5
Repair or install. We fabricate on-site when needed, seal with rated crown coat or silicone, and torque every fastener to spec.
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Final camera pass and documentation. We camera again to confirm clear flue and proper cap alignment. You receive photos, the written warranty, and our 365-Day Done Right Promise before we leave.
BeforeAfterWhat Gelco Chimney Cap & Crown Costs in Denton
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Gelco cap removal and reinstall (same cap, resealed) | $180 - $260 | Flue tile condition, height of chimney, rusted fasteners |
| Gelco single-flue cap replacement (stainless) | $320 - $480 | Flue diameter, mesh specification, wind-load rating needed |
| Gelco multi-flue cap replacement | $540 - $780 | Chase dimensions, custom fabrication, access difficulty |
| Crown repair - bonded coating | $380 - $620 | Crown square footage, depth of spalling, need for mesh reinforcement |
| Crown rebuild - poured concrete with proper pitch | $1,200 - $1,800 | Crown size, flue count, scaffolding requirements |
We don’t charge for the estimate, and we don’t start work until you’ve approved the written price. Bring us a competitor’s written quote - our Free Second Opinion applies to Gelco work too. Call (940) 373-6912.
Why Denton Homeowners Call Emberly Chimney Cleaners Denton for Gelco Work
We’ve inspected and cleaned more than 38,000 chimneys since 2009, and a healthy share of those have been Gelco caps and crowns in Denton homes from the 1990s through the 2010s building waves. Corrine Halstead and our crew know the difference between a Model C that’s worth saving and a galvanized M-series that’s throwing good money after bad. We carry DuraFlex and HeatShield materials alongside Gelco-compatible parts, so we’re not locked into one manufacturer’s inventory or pricing. Every tech is background-checked, uniformed, and licensed - their number is on the invoice you sign. And the 365-Day Done Right Promise means if the crown coat cracks or the cap seal fails, we make it right without a second invoice.
FAQs
No. As an independent Gelco service provider, we use OEM or compatible parts and document the work. Gelco’s warranty covers manufacturing defects, not who installs it. We keep your parts receipt and installation photos on file under Haven Standard Clause 4.
Most single-flue replacements take two to three hours from ladder set to final camera pass. Multi-flue caps or chase cover retrofits may run four hours. We book enough time to do it once and do it right.
If the crown has surface spalling or hairline cracks but the structural slab is sound, a bonded crown coat with proper pitch correction usually lasts 10-15 years. If the crown is cracked through to the flue tile or the wash has reversed slope pooling water toward the brick, we recommend a full pour. The camera and a hammer test tell us which in about ten minutes.
We stock common Gelco-compatible stainless caps and crown coat materials. Uncommon sizes or custom wind-load specs order through our Haven buying network and typically arrive in two to three business days. We’ll tell you before you book whether your part is on the truck or incoming.
Water in the firebox, rust streaks on the exterior brick, or a cap that rattles or sits crooked are the three most common signs. But we’ve also found that what looks like a crown leak is actually deteriorated flashing or a cracked flue liner. That’s why we camera first, price second, and work third. Call (940) 373-6912 and we’ll schedule a look - estimates are free.
Written by Corrine Halstead, Owner, Emberly Chimney Cleaners Denton at Emberly Chimney Cleaners Denton, serving Denton and nearby areas.