Gas fireplace service
Sweep & inspection
Caps & crowns
Flue relining
Masonry repairLevel 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 Fremont Homeowners Choose Gelco Chimney Cleaning
We provide independent Gelco chimney cleaning, cap replacement, and top-sealing damper repair across Fremont, and our crew has pulled, cleaned, re-seated, and replaced these components for years. What sets our Gelco work apart is that we don’t just sweep the flue and leave, we inspect the cap, the mesh, the mounting legs, and the damper gasket because those are exactly the points where Fremont fog and wind do their damage. You get a complete assessment of the whole system, not just the inside of the pipe. As an independent Gelco service provider, we aren’t authorized by or affiliated with the manufacturer, which means we diagnose what’s actually failing and quote repair or replacement honestly. Call (844) 980-4364. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Why Trust Chimney Cleaning Fremont for Your Gelco Chimney Cleaning?
Gelco caps and top-sealing dampers fail in predictable ways, and you learn those patterns after you’ve handled a few hundred of them. We know where the mesh pushes in. We know where the mounting legs rust loose at the crown. We know how a hardened gasket feels when you press it, and we know when a cap is worth cleaning and re-sealing versus when it’s done. That hands-on familiarity comes from years of working on Fremont’s mid-century ranch homes, many of which still have their original exterior brick chimneys with Gelco components on top.
Raul Escobar, our owner, grew up in the Niles district and learned building systems at Chabot College before spending years in the trade. He started this company because he wanted chimney and vent work done the way he’d want it on his own house: a real diagnosis first, then a repair that holds. We treat a Gelco cap or damper as part of the whole ventilation system, not an isolated piece. And because we also rebuild crowns, reline flues, and clean dryer vents, we see how all those parts interact. A cap that’s failing isn’t just a cap problem. It’s usually a signal the crown below it is moving too.
We use quality stainless and gasket components that fit Gelco equipment. If an OEM or exact-fit stainless piece is available, that’s what we use. If it’s discontinued or back-ordered, we turn to a quality aftermarket equivalent. Nothing gets improvised, and nothing gets passed off as fine when it isn’t.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Common Gelco Chimney Cleaning Problems We Fix in Fremont
- Crushed or corroded mesh screens. Gelco multi-flue and single-flue caps use stainless mesh to keep animals out of the flue. Wind-blown debris, salt air off the Bay, and the occasional determined squirrel all take their toll. Once that mesh is pushed in or rusted through, birds and rodents get into the flue and sometimes into the smoke chamber. We find nests, droppings, and shredded insulation in Fremont flues every season. The fix is a new cap or mesh section, not a patch.
- Rusted or loosened mounting legs. The legs and screw tabs that hold a Gelco cap to the crown are usually the first thing to go. Fog off the Bay keeps exterior brick damp for months at a time, and that moisture works on the fasteners. A cap that shifts on the crown opens a gap for rain and lets heat escape. We pull the cap, inspect the crown underneath, and re-seat it with new stainless fasteners when the cap itself is still sound.
- Hardened top-sealing damper gaskets. A Gelco top-sealing damper works by pulling a gasket down tight against the flue opening. That gasket is rubber or silicone, and after years of heat, creosote exposure, and dry Fremont summers, it hardens and loses its seal. The result is a damper that doesn’t close tight, which means downdraft on windy nights and warm air leaking up the flue all winter. Replacing the gasket and cleaning the seating surface usually restores the seal.
- Staining and pitting from smoke acids and fog. Stainless doesn’t rust the way steel does, but it does stain and pit when wood-smoke acids sit on it season after season. Fremont’s combination of occasional fireplace use and long stretches of damp coastal air means those acids never really wash off. We clean the cap body, inspect for pitting that could compromise the structure, and tell you plainly if it’s cosmetic or structural.
- Seized fasteners that make removal risky. Older Gelco caps often have fasteners that have corroded into place. Forcing them risks cracking the crown or damaging the flue tile underneath. We use penetrating lubricant, patience, and the right tools to free the cap without wrecking what’s below it. This is where experience matters: a rushed removal turns a cap replacement into a crown rebuild.
Gelco Parts & Our Repair-vs-Replace Approach
We don’t stock OEM or genuine Gelco parts, and we won’t pretend otherwise. What we do is match your existing cap or damper with a quality component that fits it correctly. When an OEM stainless cap or gasket kit is available, we use it. When it’s discontinued or on back-order, we use a proven aftermarket stainless or gasket kit instead. The difference is in the fit and the material, not the box it comes in.
Our rule on repair versus replacement is simple. If a Gelco cap is only cosmetically worn, stained, or slightly loosened, we clean it, re-seat it, and seal it. If the mesh is structurally gone, the fasteners have failed, or the body is pitted through, replacement is the honest call. We’ll show you what we’re seeing and quote both options when they both exist, but we won’t recommend spending money on a cap that’s already past the point of saving. The written estimate sets the final price, and the estimate is free. Call (844) 980-4364 to schedule yours.
Our Gelco Service Process – Step by Step
- 1
Diagnosis. We start on the roof, not in the living room. We inspect the Gelco cap or damper, the crown, the flue, and the firebox as one connected system. We look for the specific failure modes this page describes because Fremont’s fog and dry-season neglect create them in patterns.
- 2
Repair or replacement. If the cap or damper can be cleaned and re-sealed, that’s what we do. If it needs a new cap, new mesh, a new gasket, or new fasteners, we quote the work and do it on the spot when we can. We explain every step in plain English before we touch anything.
- 3
Test and verify. After a top-sealing damper job, we open and close it several times to feel the seal. After a cap replacement, we check that it’s seated level and the fasteners are torqued. We also run the flue inspection camera to confirm nothing got missed inside.
- 4
Documentation and follow-up. You get a written note of what we found, what we did, and what we’d watch going forward. If something can safely wait, we’ll tell you that too. We repair what others only report, but we never recommend a repair just to fill an invoice.
See the difference
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After
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After
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AfterGelco Products We Service & Install in Fremont
Our crew works on Gelco multi-flue stainless chimney caps, Gelco top-sealing damper assemblies, Gelco single-flue stainless caps with mesh spark screens, and Gelco fireplace glass door and screen enclosure sets. That covers most of the Gelco components you’ll find on Fremont’s 1950s and 1960s ranch homes, whether they’re original installations or later retrofits. If you’re not sure what you have, we’ll identify it during the estimate. We service and install these products with quality parts that fit them, and we’re upfront that we’re an independent shop, not a Gelco dealer.
We Also Service These Brands
While this page focuses on Gelco, our chimney repair work also covers DuraFlex flexible stainless liner systems and HeatShield ceramic flue resurfacing. If your Gelco cap is fine but the flue below it is cracked or deteriorated, we can reline or resurface it with professional-grade materials from those manufacturers. One call covers sweep, repair, and dryer vents.
FAQs – Gelco Chimney Cleaning Service in Fremont
No. We are an independent Gelco service provider, not authorized, sponsored, or warranty-backed by the manufacturer. That independence means we diagnose what’s actually failing and quote repair or replacement honestly. It also means we have no incentive to push a brand-new cap when cleaning and re-seating would work just as well.
It depends on how the mesh is attached and how much of it has failed. If the mesh is dented in one section but the cap body and mounting legs are still sound, replacing a mesh section is often possible. If the corrosion has spread through the fasteners or the cap body is pitted, a full replacement is the honest call. We’ll show you what we’re seeing and quote both options when they both exist. Call (844) 980-4364 for a free estimate.
Usually it is. The most common cause is a hardened gasket that no longer makes a tight seal against the flue opening. Replacing the gasket and cleaning the seating surface restores the seal in most cases. If the damper frame itself is warped or the cable is damaged, replacement may be required. Either way, a damper that leaks costs you heat all winter and lets downdraft push smoke into the house on windy nights. Call (844) 980-4364 and we’ll diagnose it.
Gelco caps hold up as well as any stainless cap in this climate, provided the mounting is solid and the fasteners are checked periodically. The failures we see most often aren’t the cap body giving out. They’re the legs rusting loose because the crown grout failed, or the mesh getting crushed because a branch landed on it, or the gasket hardening because the damper hadn’t been exercised in years. We were called to a Fremont home where the owner heard flapping in the flue on windy nights; the multi-flue cap’s spark-screen mesh had been pushed in and the mounting legs had rusted loose at the crown. We pulled the cap, cleaned the flues, cleared a small nest from the smoke chamber, and re-seated a stainless replacement cap with new fasteners, then cleaned the top-sealing damper gasket so it closed flush again. The flapping stopped and the damper sealed tight. The brand wasn’t the problem. The mounting was.
Yes. A proper sweep includes pulling the cap or damper so we can clean the entire flue from top to bottom, not just what we can reach from the firebox. We remove the Gelco cap carefully, inspect the mesh and mounting legs, set it aside, sweep, and then reinstall it with the fasteners checked. If the cap is damaged and unsafe to reinstall, we’ll show you and quote a replacement. Your sweep isn’t complete until the cap is back on tight and the damper seals.
Gelco chimney cleaning in Fremont typically costs between $189 and $379 for a standard sweep with cap removal and inspection, depending on the flue height, access, and whether the cap or damper needs additional cleaning or gasket work. Cap replacement or damper repair is quoted separately after we diagnose what’s needed. The written estimate sets the final price, and estimates are free. Call (844) 980-4364 for an exact quote on your system.
Book Your Gelco Service in Fremont, CA
If your Gelco cap or top-sealing damper hasn’t been inspected in over a year, call us. A clean chimney isn’t a luxury, it’s just what stands between your fireplace and your roof. We serve Fremont homeowners with the same care we’d give our own flues, and we show you what we find before we recommend anything. Call (844) 980-4364. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by Raul Escobar, Owner at Chimney Cleaning Fremont, serving Fremont since 2011.