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.
Why Fontana Homeowners Choose Gelco Chimney Cleaning
Fontana Gelco service means more than running a brush up a flue. We work on Gelco caps, dampers, screens, and prefab venting sections across this city every week, and that repair history tells us exactly how these components age in Fontana’s dry heat and Santa Ana wind. We’re an independent shop, not authorized or endorsed by Gelco, but our crews know their hardware from field experience, not a catalog.
Fontana’s older tracts south of the 210 near the former Kaiser Steel site are full of original masonry fireplaces wearing Gelco multi-flue caps and top-mount dampers that have been through thirty or forty Inland Empire summers. Those are the systems we see most. When you call Ashwood Chimney Sweep at (833) 805-3229, you get the company Norm Castillo built, not a franchise call center.
Why Trust Ashwood Chimney Sweep for Your Gelco Chimney Cleaning?
Norm Castillo grew up off Sierra Avenue in Fontana, not far from where the old Kaiser Steel mill used to run, and he never really left. He picked up his trade fundamentals at Chaffey College in Rancho Cucamonga, went through their HVAC and building systems program, and narrowed his focus entirely to chimneys, flues, and venting systems. Close to two decades later, he’s still the guy locals call when a fireplace hasn’t been touched in years or a gas insert is venting wrong and nobody can figure out why.
That background shapes how we handle Gelco equipment. A Gelco top-mount damper is not a mystery to us. We’ve removed enough of them to know which gaskets harden first, which fasteners seize in Fontana’s heat-and-dry cycles, and which cap screens tear when the wind off the Cajon Pass loads them with leaf litter and bird nesting. We match replacement parts to the existing Gelco hardware without forcing aftermarket pieces that don’t seat correctly. The repair gets done right the first time because we’ve seen the wrong way more times than we can count.
Styles & brands we work with





Common Gelco Chimney Cleaning Problems We Fix in Fontana
Here’s what actually shows up in Fontana homes, based on what we pull off roofs and out of flues every month:
- Crushed or clogged Gelco cap screens. Santa Ana wind events strip leaves from every eucalyptus and pepper tree in the city and drive the debris straight into chimney caps. We routinely find Gelco spark arrestor screens packed tight enough to block draft, and just as often find screens that have been bent or crushed by wind-thrown branches. The fireplace smokes on startup, and the homeowner assumes the flue is clogged. The flue is fine; the cap screen is the problem.
- Seized fasteners on cap and screen assemblies. Fontana’s hot summers and dry air cycles cause the stainless hardware on Gelco caps to seize over time. The cap still looks fine from the ground, but the screws won’t turn when we go to pull it for a sweep. We deal with this by replacing rusted or seized hardware with new stainless fasteners during service, not by leaving the cap half-attached and hoping it holds through the next wind event.
- Hardened top-mount damper gaskets. This is the one owners notice most. A Gelco top-mount damper with an original gasket will eventually develop a leak that lets cold air drop down the flue and fireplace odors rise into the living room on idle days. The damper feels stiff at the handle or the cable gets hard to pull. The gasket material has hardened to the point it no longer seals. A sweep alone won’t fix this; the gasket needs replacement.
- Corroded prefab flue joints and cap flashing. In Fontana’s older stucco subdivisions from the 1970s and 80s, many prefab fireplaces were installed with Gelco venting sections and cap flashing at the roofline. Decades of inland heat cycling followed by the occasional intense winter rain cause those joints and flashing points to corrode. Water staining on the firebox or smoke chamber is the tell. Left alone, it rots the framing around the chase.
- Birds nesting through damaged cap screens. Once a Gelco screen gets even a small tear, starlings and sparrows in Fontana will find it. Nests get built inside the cap, the flue gets blocked, and the next fire smokes into the house or carbon monoxide drafts back down. We remove the nesting during the sweep and replace the damaged screen before we leave, because in this city, if there’s a hole, a bird will find it within a season.
Call (833) 805-3229 to schedule a Gelco cap, damper, and flue inspection. A clean flue isn’t a luxury – it’s just the job done right.
Gelco Parts & Our Repair-vs-Replace Approach
We match Gelco caps, screens, and damper assemblies with correctly sized OEM-equivalent parts and hardware. That means a replacement cap is sized for the existing flue tile or prefab chase, not shimmed or spaced with whatever happened to be on the truck. If a Gelco cap frame is still dimensionally sound, we replace the screen, replace the fasteners, and reseat the whole assembly. If the frame is rusted out of dimension or the spark arrestor mesh has torn away from the frame, we replace the cap. No force-fitting, no “this will get you through the winter.”
And if the flue structure itself is failing, we tell you plainly. A new Gelco cap will not fix cracked tile liners or spalling brick. It’ll make the top look better while the flue keeps deteriorating. We’d rather lose a small accessory sale and keep you as a customer who knows what’s actually wrong with the chimney. Call (833) 805-3229 and we’ll walk you through exactly what your system needs and what can wait.
Our Gelco Service Process – Step by Step
- 1
Diagnosis. We start by pulling the Gelco cap or damper assembly and running a camera down the flue. You see the footage yourself. We’re looking for screen damage, damper gasket condition, flue joint corrosion, creosote buildup, and any water staining that points to failing prefab flashing. No work gets recommended until we can show you why on the camera.
- 2
Repair or replacement. We sweep the flue first, then address the Gelco hardware. Damper gaskets get replaced with correct-diameter material. Torn screens get replaced with matching mesh and stainless fasteners. If the cap is beyond saving, we install an OEM-equivalent Gelco cap sized to the flue and seated properly at the crown.
- 3
Test. After reassembly, we check the draft with the damper open and verify the top-mount damper seals when closed. On a gas insert running through Gelco venting, we verify the vent path isn’t restricted and the joints are seated at the correct pitch. The job isn’t done until the system drafts clean and the damper holds.
- 4
Documentation. You get a written summary of what we found, what we did, and what your next service interval should be. If we saw early-stage damage that can wait, we’ll tell you what to watch for and when we’d recommend returning.
See the difference
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After
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After
Before
AfterGelco Products We Service & Install in Fontana
We service and install the full range of Gelco chimney hardware homeowners actually have on their roofs in Fontana. That includes Gelco multi-flue chimney caps in stainless and black-painted steel, Gelco chimney caps with spark arrestor screens, Gelco top-mount dampers and fireplace-face dampers, and Gelco prefab fireplace venting and flue components. We stock common cap sizes, damper gaskets, screen mesh, and stainless fasteners locally, which means most Gelco repairs in Fontana don’t wait on a parts shipment.
If you have a Gelco cap or damper installed by another company, we can still service it. The hardware is the same, we just didn’t put it up there.
We Also Service These Brands
Gelco is one of several professional-grade brands we work with. We’re also stocked and certified to install DuraFlex flexible liner systems and we’re HeatShield-capable for flue liner restoration without full demolition. One contractor handles the sweep, the cap, the damper, and the liner. That’s the whole point of calling a full-service shop.
FAQs – Gelco Chimney Cleaning Service in Fontana
No. We are an independent Gelco service provider, not authorized or endorsed by Gelco. What that means is our credibility comes from field repair history, not a manufacturer badge. We’ve serviced enough Gelco caps, screens, and dampers in Fontana and the surrounding Inland Empire to know how they age, how they fail, and how to fix them correctly, and we bring that same expertise to our Gelco service in Bloomington.
Yes, if the cap frame is still sound, we replace the screen, replace the fasteners with stainless hardware, and reseat the cap. If the frame itself is bent or rusted out of dimension, replacing only the screen leaves you with a cap that won’t sit right and will tear the new mesh within a season. We’ll show you the frame and let you make the call. Call (833) 805-3229 and we’ll give you a straight answer.
That’s the gasket hardening. Gelco top-mount dampers seal against a gasket that sits on the cap frame, and in Fontana’s dry inland heat, that gasket loses its flexibility over time. The handle gets stiff, the cable feels tight, and air starts moving down the flue when the fireplace is idle. The fix is replacing the gasket and lubricating or re-routing the cable if it’s binding. It’s a common repair in Fontana homes with original dampers from the 1980s and 90s.
It does, and faster than most owners expect. High summer heat dries out gaskets and seizes fasteners. Santa Ana winds load cap screens with debris and tear mesh that’s already compromised. And Fontana’s rare but intense winter rains find every small gap at the cap flashing or flue joint. A Gelco cap that’s never been inspected after five years in Fontana is usually carrying at least two of these problems.
Annually, even if you don’t burn much. Fontana’s South Coast AQMD no-burn days mean fireplaces often sit unused for long stretches during winter inversions, and creosote hardens and glazes in that idle time. The cap screen should also be checked every year because wind-blown debris and bird activity in Fontana will clog or damage it faster than the flue itself needs sweeping. For an exact assessment, call (833) 805-3229.
Gelco chimney cleaning in Fontana typically runs $200 to $375 for a standard sweep and inspection, and more if cap, screen, or damper repair is needed during the same visit. If we’re replacing a Gelco cap screen or damper gasket at the same time, the repair parts are priced separately after we show you the damage on camera. Call (833) 805-3229 for an exact quote, estimates are free.
Book Your Gelco Service in Fontana, CA
If your Gelco cap hasn’t been pulled this decade, or the damper hasn’t sealed right since last winter, we’ll put it on the schedule. Call Ashwood Chimney Sweep at (833) 805-3229 for a free estimate on Gelco service in Fontana, CA.
Written by Norm Castillo, Owner at Ashwood Chimney Sweep, serving Fontana and the Inland Empire since two decades in the trade.