Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
Gas fireplace serviceLevel 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 Cleaning in Commerce City, CO
Grafton Chimney Sweep provides independent Gelco service across Commerce City, from full sweeps and Level 2 inspections to creosote removal and damper repair. What makes our Gelco work here different is the housing: many Commerce City chimneys combine a factory-built Gelco unit with a 1960s clay-flue chase, and the correct repair depends on getting both halves right. We’re an independent shop, not affiliated with or authorized by Gelco, and our technicians have up to 15 years of experience. Call (833) 749-6226 for a free estimate.
Why Commerce City Residents Choose Us for Gelco Service
Gelco equipment shows up in Commerce City in several forms: Heat-Stream gas inserts, wood-burning inserts, factory-built metal fireboxes in newer infill homes, and glass-door and damper assemblies on original masonry fireplaces. Each one ages in its own way. A technician who has taken apart enough of these units knows where the linkage binds, where the baffle warps, and which gaskets fail first after a hard burn season.
That familiarity is the whole reason homeowners call us instead of a sweep who mostly handles plain masonry fireplaces. We carry quality parts that fit Gelco equipment, and we pair OEM Gelco gaskets, damper hardware and refractory panels with quality aftermarket equivalents only when a piece has been discontinued. Scheduling is straightforward. You get a clear time window, a written estimate before any work begins, and a technician who can fix what he finds rather than hand you a report and a referral.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Common Gelco Chimney Cleaning Problems We Solve in Commerce City
Five problems come up again and again on Gelco units along the Front Range:
- Glazed third-degree creosote on baffles and firebox walls. Burning from October through March with sudden temperature swings drives creosote deep into a glassy, tar-like layer that a brush alone won’t touch. We remove it with the right method for the stage of creosote present, not a one-size pass.
- Seized or snapped damper linkage and pivot pins. On older Gelco inserts, the linkage corrodes and the damper stays open or won’t close at all. That’s a heat-loss problem and a safety problem at once, and it’s repairable more often than homeowners expect.
- Shrunken or cracked glass-door gaskets. A gasket that shrinks lets air leak past the door. The unit then burns hot and dirty, and creosote builds faster. Replacing the gasket restores control over the burn.
- Cracked refractory panels and warped baffles. These sit inside the firebox and take direct heat. When they crack or warp, the insert no longer protects the chase around it, and the flue begins to absorb heat it wasn’t built for.
- Inserts venting into a 40-60-year-old clay-tile flue that already cracked from freeze-thaw. Commerce City’s dry winters and repeated freeze-thaw cycles crack clay tile, and a hairline crack behind an insert is easy to miss without a camera.
Gelco Service in Commerce City: What Local Conditions Mean for Your Equipment
In the older ranch neighborhoods around ZIP 80022, a Gelco insert often sits inside a brick chimney that was built without a proper flue liner, or with a shallow smoke shelf that fights the draft. A factory-built insert needs a correctly sized flue with a smooth, sealed interior, and an unlined or poorly drafting chase gives it neither. The result is smoke spillage on cold starts, weak draft all season, and creosote collecting where no brush will ever reach it. That’s why our Commerce City sweeps look at the chase before touching the insert. On these ranches, the fireplace and the flue have to be judged as a single system – the insert can be perfectly sound and still perform badly because of what surrounds it.
Gelco Models & Products We Service in Commerce City
We service Gelco Heat-Stream gas fireplace inserts, Gelco wood-burning fireplace inserts, Gelco factory-built metal fireboxes in newer infill homes, and Gelco glass-door and damper assemblies on original masonry fireplaces. The products are the kinds of units homeowners actually have in Commerce City. How we approach parts is simple: original Gelco gaskets, damper hardware and refractory panels wherever those pieces are still available, and a quality aftermarket equivalent only for a component that has been discontinued. We fit parts to the specific unit in front of us rather than forcing a universal piece to do a job it wasn’t made for. That’s part of why Gelco equipment gets repaired properly here rather than replaced out of frustration.
See the difference
Before
After
Before
After
Before
AfterGelco Service Pricing in Commerce City
Pricing depends on what the unit actually needs. A standard sweep on a Gelco insert typically runs $180 to $340. A Level 2 inspection with camera work typically runs $250 to $450. Damper linkage repair typically runs $150 to $400 depending on parts. Gasket replacement typically runs $75 to $200, and refractory panel replacement typically runs $200 to $600. A heavy creosote removal job, where the glaze has to be chemically treated, typically runs $400 to $900. These are estimates, not final prices. The written estimate you receive after the technician assesses the unit sets the number, and that estimate is free.
Call (833) 749-6226 for an exact quote on your Gelco unit in Commerce City.
Serving Commerce City, CO – Our Local Coverage Area
We serve Commerce City and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs – Gelco Chimney Cleaning in Commerce City
Yes, it usually does. An insert has baffles, a firebox liner, glass doors and a damper assembly that all collect creosote and need individual attention. A plain masonry fireplace gets brushed and vacuumed. An insert gets brushed, its baffle and firebox walls get inspected for glaze, its gasket gets checked for shrinkage, and its damper linkage gets tested. In Commerce City, we also check the chase the insert vents into. Call (833) 749-6226 for an exact quote – estimates are free.
The most common cause is a draft problem, not a dirty chimney. A cold flue has no upward pressure, and a shallow smoke shelf or an unlined chase makes it worse. A short warming burn helps, but if smoke spills every time, the flue needs to be inspected. That’s a Level 2 inspection, and it’s worth doing before the burn season starts. Call (833) 749-6226 for an exact quote – estimates are free.
In most cases, yes. Damper linkage and pivot pins on older Gelco inserts seize or snap, and the repair is a replaceable-part job rather than a whole-unit replacement. We free the linkage if it can be freed, replace hardware that’s failed, and confirm the damper seats closed before we leave. Call (833) 749-6226 for an exact quote – estimates are free.
Once a year is the baseline for a wood insert, and more often if you burn heavily from October through March. Commerce City’s freeze-thaw swings glaze creosote faster than a steady, mild burn would. Fall inspection and spring cleaning is the routine most of our customers follow. Call (833) 749-6226 for an exact quote – estimates are free.
Yes, it’s a real problem. A cracked clay liner lets heat and combustion gases escape into the brickwork it was meant to protect, and it can let carbon monoxide back into the home. A camera inspection confirms the extent. From there, the fix may be a HeatShield resurfacing or a DuraFlex flexible liner system, depending on the damage. Call (833) 749-6226 for an exact quote – estimates are free.
Service Areas Near Commerce City
We also serve homeowners in nearby Denver, Aurora, and Westminster. If you’re just outside Commerce City, call and we’ll confirm coverage for your Commerce City area address before booking.
Book Your Gelco Service in Commerce City Today
If your Gelco insert is spilling smoke, sticking at the damper, or overdue for a sweep, call Grafton Chimney Sweep at (833) 749-6226. We’ll send an experienced technician, inspect the unit and the chase behind it, and give you a free written estimate before any work starts. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by the team at Grafton Chimney Sweep.