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.
Fast, Reliable Chimney Sweep Across Walnut
If you live in Walnut and haven’t had your chimney inspected in the last two years, the most important service we offer isn’t just a sweep. It’s knowing what’s actually inside your flue before anyone recommends expensive work. Walnut’s hillside homes, especially the custom builds from the 1970s through the 1990s along streets like Lemon Avenue and Pierre Road, carry a specific set of chimney conditions we’ve learned to recognize on sight. Clay-tile flues, decorative gas-log fireplaces that haven’t seen a real fire in years, and crowns cracked by Santa Ana wind exposure all change what a proper chimney service in Walnut should include. We’re San Bernardino Chimney Sweep, led by Allen Prescott, and we handle chimney sweeping, chimney repair, and dryer vent cleaning for homeowners throughout the 91788, 91789, and 91795 ZIP codes. Call us at (877) 516-7159 to schedule a sweep or inspection, and we’ll tell you straight what we find.
Why San Bernardino Chimney Sweep Is Walnut’s Preferred Chimney Sweep Company
Walnut homeowners tend to ask sharper questions than most. This is a community of largely owner-occupied homes, many custom-built on hillside lots with real masonry fireplaces, and the owners we meet want documentation, not a sales pitch. They want to see the camera footage from their own flue before agreeing to any repair. We built our approach around that expectation. Nothing gets recommended unless we can show you the video evidence, and if the chimney doesn’t need work, we say so plainly and write it up.
We’re not a general handyman operation picking up chimney jobs on the side. Our entire company focus is chimney and ventilation systems, which means the technician who shows up in Walnut works on chimneys and dryer vents every day. That depth of focus matters when a hillside home off Grand Avenue has an unlined clay-tile flue serving a gas-log set installed 20 years ago. A generalist misses that mismatch. We look for it. From Creekside Park to Snow Creek Drive, Walnut customers call us because we can clean the chimney, identify the real problem, and fix it ourselves with contractor-grade materials rather than handing off a referral.
When you call for Chimney Sweep service, you get the same company Allen Prescott runs for the San Gabriel Valley. We don’t contract out the inspection and we don’t soft-pedal findings. If your crown is spalling or your flue was never sized for the gas-log insert now venting into it, we document it, show you, and quote a fix using materials from brands we actually stock and trust: DuraFlex, HeatShield, and Famco among them.
Styles & brands we work with
Chimney Sweep Certified in Walnut
Chimney Sweep Certified in Walnut means we don’t just run a brush up the flue and hand you a receipt. We scope the chimney, confirm whether it’s a true wood-burning flue or a decorative gas-log firebox, and check the crown, cap, and spark arrestor for the kind of wind-driven damage we see constantly on hillside chimneys facing the Santa Ana gusts out of the San Gabriel Valley. A standard sweep and visual check in Walnut generally runs $160 to $250 for a single fireplace. If we add a camera inspection, plan on $250 to $400 depending on access and flue height.
Creosote and Soot Removal
Walnut fireplaces that actually burn wood accumulate creosote just like anywhere else, though usually less per season than homes in colder, wetter climates. The dry inland air and wildfire-aware culture here means many homeowners avoid burning during red-flag days. We measure creosote in stages. First-degree is brushable. Third-degree is glazed and demands chemical treatment or mechanical removal before another fire is safe. In Walnut, we’re more often removing moderate first-degree buildup alongside soot from gas-log sets than dealing with the heavy glazing common in mountain cabins.
Annual Sweep Scheduling
An annual sweep in Walnut is really a screening event. The sweep itself takes about an hour. The value is what we see on the camera afterward. Because many local fireplaces sit idle for years, the service call often turns into an inspection finding, not a cleaning. We recommend scheduling before the first real cold snap, usually October or November, and we book Walnut jobs across the 91788 and 91789 corridors all week.
Gas Fireplace Cleaning in Walnut
Gas Fireplace Cleaning in Walnut is one of the most misunderstood services we offer. Walnut’s 1970s and 1980s custom builds frequently had wood-burning masonry fireplaces converted to gas-log sets decades ago, and the result is a fireplace that looks finished but vents through a flue never designed for that appliance. Cleaning these systems requires care. You cannot brush a gas-log chimney the way you would a wood flue without risking damage to the liner and the log set itself. We clean what’s cleanable, inspect what’s inspectable, and document what’s missing. A gas fireplace cleaning and chassis inspection in Walnut typically costs $130 to $200. If we run a camera down the flue to check liner condition, expect $300 to $425 for the full service.
Gas-Log Flue Compatibility Check
This is the check that matters most in Walnut. The gas-log set may look fine from the hearth, but if the clay-tile flue behind it was sized for a decorative wood fireplace, the venting may be wrong and the flue may be deteriorating. We verify flue diameter, liner material, and termination height against the appliance’s requirements. When there’s a mismatch, we don’t recommend a rebuild automatically. A DuraFlex liner can often bring the system into compliance without tearing out masonry.
Decorative Fireplace Screening
If your Walnut fireplace has never burned wood since you bought the house, we treat it as a screening case, not a cleaning case. That changes the equipment we bring and the checklist we run. We look for blocked dampers, cracked firebox panels, rusted gas valves, and flues that terminate but don’t actually vent. You would be surprised how often a decorative firebox hides a dangerous venting condition.
Trusted Brands We Service in Walnut
We don’t install whatever is cheapest from the supply yard. Our repair work in Walnut uses DuraFlex in Walnut flexible liner systems for relining jobs, HeatShield for resurfacing existing clay-tile flues without full replacement, and components from Famco and Copperfield where caps, dampers, and termination hardware need to match the existing setup. Part of the reason Walnut homeowners call us over cut-rate sweepers is that the repair quote comes with named materials, not vague “replacement parts.” If you have a cracked crown or a spalled flue, we can usually get HeatShield material applied within a week, and we stock common termination hardware in our truck for same-trip fixes.
See the difference
Before
After
Before
After
Before
AfterCommon Chimney Sweep Problems We See in Walnut Homes
- Unlined clay-tile flues serving gas-log inserts. These 1970s-era chimneys were built for decorative fireplaces, not modern gas appliances, and the tile liners often crack or separate under the heat differential. We see this on hillside streets throughout Walnut where the original fireplace was never converted properly.
- Wind-damaged caps and spark arrestors on uphill-facing chimneys. Santa Ana winds push debris and dry brush against the exposed side of hillside chimneys, denting caps and tearing spark arrestor mesh. Chimneys on the northern and eastern exposures off Lemon Avenue get hit hardest.
- Spalled crowns from drought-weathering. Walnut’s dry heat and sun exposure eventually crack the concrete crown on every masonry chimney. Once water seeps in, the freeze-thaw cycle is minor here, but the real damage is the mortar erosion that follows. Crown repair runs $350 to $600 when caught early.
- Dampers seized from disuse. In homes where the fireplace hasn’t been lit in years, the damper rusts or sticks shut. We free them when possible and replace them when not. A replacement damper in Walnut typically costs $250 to $450 installed depending on flue size.
Pricing for Chimney Sweep in Walnut, CA
A standard chimney sweep and visual inspection in Walnut runs $160 to $250 for a single wood-burning fireplace. Add a camera inspection and you’re at $250 to $400. Gas fireplace cleaning with chassis inspection lands between $130 and $200. If the camera finds a problem, repair pricing depends on what we document: a crown seal runs $350 to $600, a HeatShield resurfacing job on a standard clay-tile flue typically runs $1,800 to $3,200 depending on height and access, and a full DuraFlex reline runs $2,800 to $4,500 on a two-story Walnut hillside home. We give a fixed quote before any repair work starts, and every quote is backed by camera footage you can watch yourself. Call (877) 516-7159 for a free estimate and we’ll give you a real number, not a range that shifts later.
We Also Serve Cities Near Walnut
Our Chimney Sweep in Walnut team also covers the surrounding San Gabriel Valley communities. We regularly run calls out to Walnut homeowners in South San Jose Hills, Rowland Heights, West Covina, and Pomona. Same company, same equipment, same documentation standard. If you’re just over the city line, we’re already nearby.
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.
FAQs About Chimney Sweep in Walnut
Yes, but not for the reason you’d think. The gas log set may look self-contained, but it vents through a flue that was often built decades before that appliance existed. In Walnut’s 1970s and 1980s custom homes, that flue is frequently unlined clay tile that was never sized for the gas unit now connected to it. A sweep with a camera inspection verifies the flue is actually venting, not leaking into the wall cavity, and that the liner hasn’t degraded from years of heat and disuse. Even if you never light it, the flue condition still affects your home’s air quality and, in a wildfire-prone area, the safety of the chimney exterior in windy conditions. Call (877) 516-7159 to have us take a look; the camera never lies and you’ll see exactly what we see.
The fastest check is the damper and the throat. A wood-burning flue shows a full-width damper and a fireback designed for actual heat. A decorative gas-log setup often has a smaller vent run, a permanently fixed damper, or a firebox that looks shallow and narrow behind the log set. But the only definitive answer comes from a camera inspection of the flue itself. On Walnut homes where no one has burned wood in 20 years, the previous owner’s conversion may have left a hybrid system: wood firebox, gas logs, and a flue that fits neither. We’ll confirm what you have, document it in writing, and tell you if it’s safe to use as-is or needs a retrofit. The inspection fee applies toward any repair we find, and you’ll get the video to keep.
It means heat and combustion gases are venting through a material that was not designed for sustained high temperatures from a gas appliance, and that material degrades over time. Clay tile cracks under thermal stress. Once cracked, the flue can leak heat into the wood framing around the chimney chase, which is how chimney fires spread into structure fires. Walnut’s older hillside homes built in the 1970s through the 1990s often have these unlined or clay-tile flues still serving gas-log sets installed years after construction. The fix isn’t always a full reline. HeatShield can resurface a clay-tile flue in place, restoring a smooth, insulated surface without demolition. For flues that are too deteriorated, a DuraFlex liner is the right call. We’ll show you the camera evidence before we quote either one.
No, it’s the first stage of water entry, and in Walnut’s hot, dry, Santa Ana-exposed climate the damage compounds fast. The crown is the concrete slab that caps the masonry and directs water away from the flue. When it cracks, water seeps into the mortar joints, the mortar erodes, and the chimney brick or stone starts spalling. Given Walnut’s steep hillside lots and the wind loading on the upper-facing side, that damage shows up quicker than in flatland neighborhoods. Cosmetic is the wrong word. It’s a structural warning. Crown repair now costs $350 to $600. Full chimney rebuilds after years of neglect run many times that. Call us and we’ll inspect the crown from the roofline, not the ground, and tell you honestly whether it can wait.
No. Nothing gets recommended unless you’ve seen the camera footage from your own flue. That’s the rule Allen Prescott built this company on, and it’s the reason Walnut homeowners trust us. If we find spalling or a cracked crown, we don’t quote a reline on sight. We run a Level 2 camera inspection, document the actual condition, and show you the video. If the clay-tile flue can be resurfaced with HeatShield, we quote that and not a more expensive full replacement. If no work is needed, we write that down and you keep the documentation for your records. Walnut is a community that values documentation and straight answers, and we do too. Call (877) 516-7159 and we’ll put that in writing.
Written by Allen Prescott, Owner at San Bernardino Chimney Sweep, serving Walnut and the San Gabriel Valley.