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.
Trusted Chimney Sweep for Walnut Homeowners
A chimney sweep in Walnut, CA removes creosote and soot buildup that can ignite without warning. Most Walnut homes burn wood through fall and winter, and even one season of use can leave a quarter inch of flammable residue on the flue walls. We’re Walnut Chimney, led by Russ Dempsey, and we’ve cleaned, inspected, and repaired more Walnut area fireplaces than we can count. If you’re nearby in Orange County, we also offer our Chimney Sweep in Stanton. Our crews work from the firebox to the cap, checking every surface a spark can reach. Homeowners who haven’t had their chimney swept in two or more years should call (855) 341-3461 before the next fire. A clean chimney is a measurable thing, and we’ll show you exactly what we found.
Chimney Sweep Services
Chimney Sweep Services cover the full mechanical cleaning of your flue, smoke chamber, damper, and firebox, not just a quick brush pass. Walnut homeowners typically need this every 50 to 70 fires, but the real number depends on wood type, burn temperature, and whether the chimney has ever been resurfaced. Walnut Chimney uses professional-grade rods, rotary brushes, and a HEPA-filtered vacuum that keeps soot out of your living room. We inspect as we sweep, so if we find a cracked flue tile or failing mortar, we’ll show you photos and tell you plainly what can wait and what can’t. From the firebox to the cap, nothing gets skipped.
We also keep every component in good order, and our home service area spans the San Gabriel Valley and surrounding communities.
Full-Flue Rotary Sweep
Our rotary sweep uses a spinning head that scours creosote from the flue walls more thoroughly than a flat wire brush. It’s the right approach for chimneys with heavy stage 2 or stage 3 creosote, the glazed, tarlike buildup that burns hot and fast. After the mechanical pass, we hand-scrub the smoke chamber and damper shelf. Then we run a camera inspection to confirm the flue is clean end to end.
Firebox and Damper Service
A chimney sweep that ignores the firebox leaves fuel sitting inches from your hearth. We remove ash, vacuum the firebox, and scrape the damper track so the damper opens and seats correctly. A stiff or rusted damper is a common cause of smoke backing into the room, so we test it before we pack up.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Styles & brands we work with
Chimney Cleaning
Chimney Cleaning is the removal of soot, creosote, and debris from the interior surfaces of your chimney and fireplace. You need it when you can see dark, shiny buildup on the flue walls, when smoke lingers in the room, or when you can smell last year’s fires on humid days. Walnut Chimney uses a staged cleaning process: mechanical brushing, hand detailing around the damper and smoke shelf, and a final camera pass. We work with materials from Copperfield and Gelco when we find components that need replacing during the cleaning. If we find damage, we repair what we find using the right brand for the job, so one call covers it all.
Creosote Removal by Stage
Stage 1 creosote is dusty and brushes off easily. Stage 2 is flaky, crusty, and needs a rotary head to break loose. Stage 3 is the glazed, candylike deposit that can burn at over 2,000 degrees, and it sometimes requires chemical treatment or a specialized tool. We identify the stage before we start and match the method to what’s actually on your flue walls.
Chimney Smell and Draft Correction
A chimney that stinks in summer or drafts in winter usually has airflow or cleanliness problems rather than a structural fault. After cleaning, we check the flue sizing, damper position, and cap venting to figure out why smoke and odor went where they shouldn’t. Most draft problems in Walnut homes trace back to a partially closed damper or a clogged spark arrestor.
Fireplace Cleaning
Fireplace Cleaning addresses the visible masonry, firebox, grate, and glass so your hearth works safely and looks right. Soot blackens firebrick, clogs gas burner ports, and hazes glass doors, and even a clean flue won’t stop that. Walnut Chimney cleans fireboxes by hand after the flue pass, removing ash and burned-on deposits without water-blasting your masonry. We clean gas log sets, thermocouples, and pilot assemblies as part of the same visit. For Walnut homes that use the fireplace as a primary heat source, a clean firebox also makes the room warmer, since dirty firebrick reflects less heat back into the room.
Gas Log and Burner Detail
Gas fireplaces collect dust and pet hair inside the burner ports, which causes lazy yellow flames and soot on the logs. We pull the log set, brush the burner, clean the ports, and recheck the flame pattern. Then we verify the pilot and thermocouple are clean enough to light reliably.
Glass and Masonry Care
Glass doors haze over with a film that ordinary window cleaner won’t cut. We use a ceramic-glass cleaner made for high heat that restores visibility without scratching. For masonry faces, we remove surface soot and point out any spalling brick or crumbling mortar joints that need separate repair.
Chimney Services
Garden Grove Chimney Sweep services are also available nearby, and at Walnut Chimney our Chimney Services cover three things under one roof: chimney sweeping, chimney repair, and dryer vent cleaning. Most homeowners call for one issue and learn about another, like a missing rain cap or a clogged dryer vent that vents through the same wall. Rather than referring you out, we handle what we find. Our repair work uses materials from DuraFlex, HeatShield, and Copperfield, so when we recommend a liner or a resurfacing job, we’re sourcing the same products certified chimney specialists use nationwide. Chimney and dryer vent safety, handled together, is how we work. One appointment covers the fire hazards you can see and the ones you can’t.
Repair-Ready During the Sweep
If our camera finds a cracked flue tile, we can often start the fix the same day. HeatShield ceramic resurfacing restores flue integrity without tearing down masonry, and DuraFlex liners give you a code-compliant flue where the original tile is no longer safe. We repair what we find, right brand for the job.
Dryer Vent as a Core Service
Your dryer vent and your chimney share a wall and a risk profile. Lint burns fast, and NFPA data points to dryers as a leading cause of home fires. We offer dryer vent cleaning as a primary service, not an add-on, and we’ll scan it during any chimney appointment if the vent is accessible.
Chimney Sweep Certified
Chimney Sweep Certified means the technician doing your sweep has been trained and tested on fire code, flue mechanics, and inspection standards, not just handed a brush. Walnut Chimney is led by Russ Dempsey, who has worked through every kind of flue problem the San Gabriel Valley can produce. For a deeper look at common issues, see our Chimney Sweep Troubleshooting: Common Problems and How to Fix Them. Our crews follow National Fire Protection Association guidelines for chimney and vent inspection, and we document every sweep with before and after camera photos. When we say the chimney is clean, we can show you the footage. Walnut homeowners who want to see proof before paying appreciate that.
Inspection Backed by Video
Every sweep includes a camera pass after the mechanical work. You’ll see the flue walls, the smoke chamber, the damper, and the cap from the inside. We keep the images on file so next year’s inspection can be compared against this year’s baseline.
Code-Aware Reporting
If your chimney needs relining or a new cap, our report tells you what the building code in Los Angeles County requires and what it doesn’t. We don’t inflate issues to sell a liner. We walk you through what we saw and what it means, and you decide with the facts in front of you.
Gas Fireplace Cleaning
Gas Fireplace Cleaning is a service most Walnut homeowners skip, because gas flames don’t produce creosote. They still produce soot, mineral buildup on the glass, and clogged burner ports, and a dirty gas fireplace sends carbon monoxide into the room if the vent path is blocked. Walnut Chimney cleans gas log sets, vented and unvented, plus direct-vent inserts and standing-pilot systems. We check the vent termination outside, because bird nests and spider webs in the cap are common in Walnut’s oak-lined neighborhoods. We also inspect for any rust or corrosion around the burner pan, where a pinhole leak can be an issue long before you smell it.
Vent and Cap Inspection
Gas appliances depend on clear venting. We clean the vent pipe, inspect the termination cap, and confirm the draw with a smoke test. If the cap is damaged, we stock replacements from Gelco and Copperfield and can swap in the right component on the spot.
Burner and Pilot Cleaning
We remove the logs, brush the burner ports, and clean the pilot orifice so the flame burns blue and even. Yellow flames mean incomplete combustion and higher carbon monoxide output. After cleaning, we run the fireplace for ten minutes and check the flame pattern against the manufacturer’s specs.
Chimney Maintenance
Chimney Maintenance is the schedule of small, preventive actions that keep a chimney safe between full sweeps. It includes seasonal checks of the cap, crown, flashing, damper, and visible masonry, plus minor fixes like caulking gaps or tightening a loose spark arrestor. Walnut homeowners who burn wood every weekend should plan a maintenance check every year and a full sweep every one to two years. For a seasonal guide, see our Chimney Sweep Maintenance Checklist for Garden Grove Homeowners. Walnut Chimney offers maintenance as a stand-alone service and as part of any sweep. Our goal is to find the $200 problem now, before it becomes the $2,000 rebuild. A clean chimney is a measurable thing, and maintenance is what keeps it that way.
Cap, Crown, and Flashing Checks
The cap keeps rain and animals out, the crown seals the top of the masonry, and the flashing seals the roof joint. Any of the three can fail silently. We inspect all three during maintenance visits and seal small cracks with an elastomeric crown coat before water gets into the masonry.
Seasonal Pre-Burn Inspection
Before your first fall fire, we run a quick visual and camera inspection of the flue and firebox. If the chimney sat unused all summer, nests or debris can block the flue, and a blocked flue pushes smoke and carbon monoxide into the house. This is the single best insurance against a bad first night of burning season.
Brands We Service
Walnut Chimney works with six professional-grade brands, and we stock components from DuraFlex, HeatShield, Gelco, and Copperfield for the repair side of our work. DuraFlex is our go-to for flexible liner systems, which we install when the original clay tile is cracked or missing sections. The liner conforms to the existing flue path and restores a code-compliant, insulated vent for wood or gas appliances. We’ve relined dozens of chimneys in Walnut with DuraFlex, and the material holds up to the high heat and moisture cycles of Southern California winters.
HeatShield is the ceramic resurfacing system we use to restore flue interiors that are still structurally sound but have spalled tiles or eroded mortar joints. It’s a repair-level credential most basic sweep companies can’t offer, and it can save a chimney from a full rebuild. For caps, covers, and venting components, we source from Gelco and Copperfield, who make stainless steel and copper components that survive years of rain and sun. Whether you have a DuraFlex liner already, a HeatShield-treated flue, or any other make, we can service it.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Smoke backing into the room. This means the flue isn’t drawing, and the cause is usually a blockage, a closed damper, or a flue too cold to draft. If smoke comes back into the house, you’re breathing particulate and carbon monoxide, and the fire should be put out until the chimney is inspected.
- Visible dark, shiny buildup on the flue walls. That’s stage 3 creosote, and it burns at temperatures that can crack tile and ignite nearby framing. You can see it from the firebox with a flashlight if the buildup is advanced. Don’t burn again until it’s removed by a certified sweep.
- A smell like burnt campfire inside the house, even in summer. Creosote absorbs moisture and releases odor when humidity rises. The smell is a warning sign that the flue is heavily coated. A sweep removes the source of the smell rather than masking it.
- Cracked or spalling brick on the exterior chimney. Cracks let water into the masonry, and water expands when it freezes, and expansion forces the brick apart. The freeze-thaw cycle in Walnut’s winter nights is milder than the mountains, but it still takes a toll on older chimneys. Small cracks are cheap to seal; a rebuilt stack is not.
- A fire that burns lazy or yellow in a gas fireplace. This is incomplete combustion. It means the burner ports are dirty or the vent is restricted, and both raise carbon monoxide output. A gas fireplace should burn with a crisp, blue flame. If it doesn’t, schedule a cleaning and vent check.
Our Process, Step by Step
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Setup and floor protection. We lay drop cloths from the door to the hearth, seal the firebox opening, and connect a HEPA-filtered vacuum. Your floors and furniture stay clean. It takes about fifteen minutes before the first brush enters the flue.
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Mechanical sweep of the flue. We run a rotary brush or flat wire brush down the full length of the flue, from the cap to the smoke shelf. The choice depends on the creosote stage we see. The brush breaks the deposits loose, and the vacuum captures everything at the firebox opening.
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Firebox and damper detail. We hand-scrape the firebox, vacuum the ash, and clean the damper track and pivot points. If the damper is warped or rusted through, we note it and quote a replacement. A damper that doesn’t seat lets heated air escape up the flue all winter.
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Camera inspection. After the sweep, we run a camera from the firebox to the cap. You’ll see the clean flue walls and any cracks, gaps, or damage the brush uncovered. The camera footage is the basis for any repair recommendation we make, and we show it to you before we quote anything.
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Report and recommendations. We walk you through what we found, what we cleaned, and what needs attention. If we recommend a liner or resurfacing, you’ll see the camera stills that justify it. Nothing gets recommended without evidence you can see for yourself, and you get a written summary for your records.
How Much Does Chimney Sweep Cost in Walnut?
A standard chimney sweep in Walnut runs $180 to $340 for a single-flue, wood-burning fireplace in good condition. That includes the mechanical sweep, firebox and damper detail, and the camera inspection. Gas fireplace cleaning in Walnut typically runs $150 to $250. If the chimney has heavy stage 3 creosote, an animal nest, or hasn’t been cleaned in many years, the price moves toward the higher end because of extra labor and tooling. Dryer vent cleaning, if added during the same visit, is a separate line item, and we’ll tell you the number before we start.
A few things affect the final price: the height and accessibility of the roof, the creosote stage, whether the damper needs repair, and whether the flue has damaged tile that requires a separate quote. The best way to avoid overpaying is to get an inspection from a company that shows you the camera footage. Without photos, you have no way to verify what you’re paying for. Our free estimate includes the inspection, and the price we quote is the price you pay unless we find something that requires your approval before any extra work begins. Call (855) 341-3461 for a free estimate, and we’ll tell you exactly what your chimney needs and what it costs.
Our Service Area Near Walnut
Walnut Chimney serves Walnut and the surrounding San Gabriel Valley and Southeast Los Angeles communities. We regularly work in Chimney Sweep in West Athens, Chimney Sweep in North El Monte, and Chimney Sweep in Torrance, plus Boyle Heights, Westmont, Temple City, East San Gabriel, and Alondra Park. Most appointments are scheduled within the week, and we’ll confirm the arrival window when you book.
Serving Walnut, CA — Our Local Coverage Area
We’re based in the Walnut area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Chimney Sweep in Walnut
A chimney sweep is the mechanical cleaning of the flue, smoke chamber, damper, and firebox to remove creosote, soot, and debris that can catch fire. It also includes a visual and camera inspection of the chimney’s structure. Walnut Chimney performs the sweep from the top and bottom for full coverage.
A standard chimney sweep in Walnut takes 45 to 90 minutes, depending on the creosote level and whether we’re also cleaning the firebox and running the camera. Heavy buildup or an animal nest can add time. We’ll confirm the expected duration when we see the chimney.
A wood-burning chimney sweep in Walnut costs $180 to $340 for a standard single-flue fireplace, and gas fireplace cleaning runs $150 to $250. Level of buildup, roof access, and any repairs change the total. Call (855) 341-3461 for a free estimate based on your specific chimney.
Yes. We install and service DuraFlex liner systems, HeatShield ceramic resurfacing, and components from Copperfield and Gelco. Whether your chimney has a liner from one of these brands or original clay tile, we can clean, inspect, and repair it.
We handle urgent safety issues like a chimney fire, a blocked flue, or carbon monoxide concerns as quickly as scheduling allows. If you suspect an active chimney fire, call 911 first, then contact us once the fire is out. For non-emergency issues, we’ll get you on the schedule within the week.
Our repair work using DuraFlex liners and HeatShield resurfacing carries the manufacturer’s warranty on materials, and we stand behind our labor. The specifics depend on the job scope. We’ll spell out the warranty terms before any repair begins, in writing.
Clear the area around the fireplace so we have about six feet of working room, and avoid burning a fire for at least 24 hours before we arrive. The firebox should be cool to the touch. We bring hearth protection and HEPA filtration, so no additional prep is needed.
Schedule Your Chimney Sweep Service in Walnut Today
Walnut Chimney handles chimney sweeping, chimney repair, and dryer vent cleaning in one visit, with camera documentation and no pressure to buy work you don’t need. Led by Russ Dempsey, we serve Walnut and the surrounding San Gabriel Valley. Call (855) 341-3461 for a free, no-obligation estimate, and we’ll tell you what your chimney actually needs.
Written by Russ Dempsey, Owner at Walnut Chimney, serving Walnut and the surrounding communities.