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 Cupertino, CA
We clean and repair Gelco fireplaces and chimney systems throughout Cupertino, including the older ranch and Eichler-style homes that make up so much of the city’s housing stock. The difference here is simple: many of these fireplaces were built in the 1950s through 1970s and haven’t been opened up in decades. We know what that neglect looks like, and we know what these Gelco systems need to run safely again. Call (833) 593-7116 for a free estimate. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday.
Why Cupertino Residents Choose Us for Gelco Service
Gelco fireplaces and prefabricated chimney systems are built to last, but they don’t last forever without attention. Fireboxes crack. Dampers warp. Spark arrestors rust through and let squirrels in. We’ve seen all of it in Cupertino, over and over, often in homes where the new owner just bought the place for the fireplace and wants it working right without tearing out half the living room. That’s the work we do. As an independent service provider, we’re not affiliated with Gelco, which means we tell you straight what your system actually needs. If a firebox panel is cracked but the chimney structure is sound, we replace the panel. If the whole thing is compromised, we say so. We repair, install, and service Gelco equipment with quality parts that fit it, and we’re careful to distinguish between the jobs that need OEM Gelco parts and the ones where a solid aftermarket cap works fine. Kurt Jessup, our owner, learned building systems and combustion ventilation through the HVAC and construction technology program at Evergreen Valley College, then spent close to two decades working chimneys across the South Bay before starting this company in 2014. His approach on every job: inspect, explain, then repair. No pressure, no mystery.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Common Gelco Chimney Cleaning Problems We Solve in Cupertino
- Cracked refractory firebox panels. Years of heat cycling plus moisture intrusion from the occasional winter rain will eventually crack the panels in a Gelco Heat-Circulating Fireplace. It’s one of the most common things we find in Cupertino’s older ranch homes, especially when the chimney cap has been missing for a while and water has been getting in. A cracked panel isn’t always a teardown, but it needs to be looked at before the next fire.
- Corroded dampers that don’t seal. A warped metal damper lets conditioned air escape up the flue year-round. In Cupertino’s mild climate, homeowners often leave the fireplace unused for months, so the damper sits closed and the corrosion worsens. We replace dampers that no longer seal so the fireplace holds heat when you actually want it.
- Failed mortar joints and spalling brick. Creosote and condensation work through the firebox over time, eating away at mortar joints until brick faces start flaking off. This is especially true in fireplaces that haven’t been swept in years, which is common in the 1950s-70s houses here. We repair firebox masonry in-house, no handoff to a separate mason.
- Missing or damaged spark arrestors and caps. The older ranch neighborhoods of Cupertino are full of uncapped chimneys, and squirrels figure that out fast. A missing cap means animals, nests, water, and debris dropping into the flue. We install multi-flue caps and spark arrestors to keep the system sealed.
- Glazed creosote in flues that sit idle for months. Cupertino’s dry Mediterranean climate means fireplaces go unused all summer, and what’s left in the flue sits and hardens. By the time fall arrives, what would have been a routine sweeping turns into glazed creosote removal. We handle it with the right brushes and technique, and we’ll tell you honestly whether a chemical treatment makes sense for your flue.
Gelco Service in Cupertino: What Local Conditions Mean for Your Equipment
Let’s be specific about what happens in Cupertino. The mild, dry summers here mean fireplaces go unused for four or five months at a stretch, and during that time the creosote left in the flue doesn’t just sit there. It hardens and glazes, making it far more difficult to remove in the fall than if the same flue got swept every year. Add to that the uncapped chimneys you see across the older ranch tracts near neighborhoods like Rancho Rinconada, and you get a predictable seasonal problem. Squirrels and chimney swifts take over flues during the spring and summer, building nests and pulling in debris. By late summer, homeowners start hearing scratching sounds and notice an odor, and they call us. What we find, in order: a nest, a blockage, sometimes water damage from a missing cap, and almost always a layer of glazed creosote underneath it all. The first fall inspection on a Gelco Prefabricated Chimney System in these homes often turns into a Level 2 inspection simply because the system hasn’t been opened in years and it’s never been relined. That’s not scare tactics. It’s what the housing stock and the wildlife patterns actually produce around here.
Gelco Models & Products We Service in Cupertino
We work on Gelco Heat-Circulating Fireplaces, See-Through Fireplaces, Corner Fireplaces, and Prefabricated Chimney Systems across Cupertino. Each of these has different panel configurations, damper setups, and chimney runs, and each one has its own way of failing after years of use and occasional neglect. We choose quality parts that fit the actual system, not whatever is cheapest on the shelf. For critical components like firebox panels and dampers, we source OEM Gelco parts when they’re available. For caps, flashing, and other exterior components where OEM has been discontinued, we use high-quality aftermarket equivalents that hold up in the dry heat and occasional wildfire-season winds this area gets. We’re an independent shop, not a Gelco dealer, and we’ll never pretend otherwise.
See the difference
Before
After
Before
After
Before
AfterGelco Service Pricing in Cupertino
Chimney cleaning for a Gelco fireplace in Cupertino typically runs between $200 and $450, depending on the condition of the flue and whether we’re dealing with routine soot or hardened glazed creosote. Cap installation generally falls in the $250 to $550 range, including the cap itself and the labor to get it secured properly. Firebox panel replacement runs higher, typically $500 to $1,600 per panel, since OEM panels for Gelco systems aren’t always cheap and the job involves careful removal and resetting. If a flue needs resurfacing rather than replacement, HeatShield restoration is often a cost-considered alternative to full relining, and we’ll walk you through when that makes sense for your chimney. Every estimate is free, and the written estimate sets the final price. No guesses, no pressure. Call (833) 593-7116 for an exact quote for your fireplace.
Serving Cupertino, CA – Our Local Coverage Area
We serve Cupertino 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 Cupertino
Expect a thorough look at what’s actually there. In a 1960s ranch home with an original Gelco system, the flue probably has years of accumulated creosote and the firebox may show cracking from heat cycling. We’ll perform a Level 2 inspection, which includes a camera scan of the flue interior, and we’ll show you the footage. You’ll see with your own eyes whether the flue needs relining or just a thorough sweeping. Nothing gets recommended without camera evidence you can inspect yourself. Call (833) 593-7116 to book an inspection. Estimates are free.
The odor usually comes from creosote and trapped animal debris inside the flue, made worse by the dry summer heat in Cupertino. An uncapped chimney collects nests, leaves, and the occasional squirrel, and when that material sits in a warm flue, the smell drifts down into the house. The fix is straightforward: remove the debris, sweep the flue thoroughly, and install a cap with a spark arrestor so it doesn’t happen again. If the odor persists after cleaning, the issue may be moisture in the firebox, and we’ll explore that during the inspection. Call (833) 593-7116 to get your system opened up and cleaned out.
You can often repair cracked panels by replacing them individually, and that’s a job we do regularly on Gelco Heat-Circulating and Corner Fireplaces in Cupertino. The question is what else is going on behind the panel. If the chimney structure is sound and the crack is confined to the panel itself, replacement of the panel is straightforward. If moisture has worked through the panel and deteriorated the chimney walls, then a full replacement may be the honest answer. We’ll inspect, show you what we find, and give you a straight recommendation either way. Call (833) 593-7116 to schedule the inspection.
Yes. A spark arrestor cap does two jobs at once: it keeps embers from leaving the flue and starting a fire near the home, and it keeps animals and debris out. In Cupertino, where the Santa Cruz Mountain interface sits close and wildfire season is an annual reality, many homeowners want this added to their older Gelco systems. We install multi-flue caps and spark arrestors and we’ll make sure the cap is properly sized for your chimney’s actual geometry. Call (833) 593-7116 for a free estimate on cap and spark arrestor installation.
A Level 1 inspection is a visual check of the accessible parts of the fireplace and chimney, which is what we do during a routine sweep. A Level 2 inspection goes further: we run a camera into the flue to check the interior surfaces, look at the attic and crawlspace clearances, and assess the entire system for damage or blockages. For most Gelco systems in older Cupertino homes, especially ones that haven’t been opened in years, we recommend a Level 2 because it’s the only way to see what’s really happening inside the flue. Call (833) 593-7116 and we’ll help you figure out which level your fireplace actually needs.
Service Areas Near Cupertino
Chimney Cleaning Sunnyvale serves Cupertino and the surrounding South Bay communities, including Sunnyvale, Santa Clara, North San Jose, and Milpitas. We also work in Sunnyvale and Los Altos for Gelco owners in those areas. Regardless of where you are, one call covers your chimney and your dryer vent.
Book Your Gelco Service in Cupertino Today
The first cold snap in Cupertino always brings a rush of calls from homeowners who waited too long. Don’t be one of them. Call (833) 593-7116 now for a free estimate on your Gelco fireplace or chimney. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday. Get the system inspected before the squirrels and the creosote make it worse.
Written by Kurt Jessup, Owner at Chimney Cleaning Sunnyvale, serving Cupertino since 2014.