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.
Chimney Company in Walnut, CA
Chimney repair in Walnut usually means one of two things: a leak that shows up as a water stain on a stucco ceiling, or a gas-log fireplace that hasn’t been inspected since it was converted a decade ago. Walnut’s 1980s and 1990s tract homes were built with fireplaces in nearly every floor plan, and most of those fireplaces now run on gas logs, sit behind glass doors, and get used a few dozen evenings a year. That changes the work. We’re not chasing chimney fires here. We’re chasing slow, quiet problems: rusted dampers, cracked crowns, loose flashing, and flue liners that were never designed to handle forty years of thermal cycling. If you need an honest diagnosis, call Mantel Chimney Sweep at (844) 821-5749.
Why Walnut Homes Are Different
Walnut sits in the foothills of the San Jose Hills, where the summers run hot and dry and the winters rarely dip below freezing. That USDA zone 10a climate means the chimney exteriors here stay in better shape than homes in colder, wetter parts of the country. Stucco and tile roofs are the norm across the 91788, 91789, and 91795 ZIP codes, and that shields a lot of flashing from the kind of freeze-thaw damage you see elsewhere. But the dry heat brings its own problem: birds and rodents. An uncapped flue in Walnut will collect nesting material through the long hot summer, and by late fall that nest can be compacted enough to block a flue entirely. The rhythm here is predictable. Most of our Walnut repair calls cluster between late September and mid-November, right before the first cold snap sends everyone to the gas-log switch. And because so many Walnut homes were built as upscale planned communities with tight construction, a blocked flue isn’t just a fireplace problem: it’s a carbon monoxide concern in a house that seals up tight.
The housing stock itself tells us what to expect before we arrive. These are 1970s through 1990s single-family tract and semi-custom homes on larger lots, many with brick or stone fireplaces and masonry or factory-built metal chimneys. A sizeable share of the fireboxes were converted to gas logs years ago, which means many Walnut chimneys haven’t carried a wood fire in decades. That’s fine for the firebox, but the flue above it may still be the original clay tile liner, and clay liners crack with age and heat. When a gas log set vents into a cracked liner, the exhaust doesn’t draft the way it should. Homeowners notice the glass fogging, a faint odor around the fireplace, or a wall that feels warm above the mantel. None of those are emergencies on their own, but all of them deserve a camera inspection before the heating season starts.
Styles & brands we work with
Our Main Walnut Services
Two services account for most of the calls we take from Walnut homeowners: chimney sweeping and dryer vent cleaning. Both come back to the same thing: a house that seals up tight and venting systems that need to move air and exhaust out safely.
Chimney Sweep in Walnut
A chimney sweep in Walnut is rarely a heavy creosote removal job. With the warm, dry climate and the prevalence of gas logs, most Walnut sweeps are about clearing soot, pulling out bird nesting material, and confirming the flue is still sound. What makes the difference is what happens after the brushing: we inspect. Every sweep includes a look at the liner, the damper, and the cap because a clean flue with a cracked liner is still unsafe. Here’s the detailed breakdown of what a sweep includes in Walnut: Chimney Sweep in Walnut.
Dryer Vent Cleaning in Walnut
Dryer vent cleaning in Walnut matters as much as chimney work in these tight, 1980s-era subdivisions, where dryer ducts often run long horizontal distances through stucco walls to reach an outside vent. Lint builds up in those runs, and a clogged dryer vent is one of the most common residential fire hazards in the country. For Walnut specifically, the dry air makes lint more brittle and likely to compact rather than pass through, so vents here can reach dangerous restriction faster than homeowners expect. Read more about how we clear those ducts here: Dryer Vent Cleaning in Walnut.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Chimney Repair in Walnut
Chimney repair in Walnut typically runs between $295 and $2,300 depending on what failed, and most jobs are diagnosed the same day we arrive. Most repair calls start the same way: a homeowner notices a water stain on the ceiling near the fireplace, or a gas log set that fogs the glass every time it runs, or a fireplace that hasn’t been used in three years and now smells damp. Because Walnut’s chimneys are often factory-built metal flues sealed behind stucco or chase covers, the failure points are usually the cap, the crown, the flashing at the roofline, or the liner itself. We repair what we find, and we’ll show you the photos before any work begins. That’s the core of what we do at Mantel Chimney Sweep – full repair capability so you’re not left with a report and a referral to someone else. If you’re researching Chimney Repair in this area, here’s what to know.
Chimney Cap Installation
Signs you need it
You notice nesting material, debris, or squirrel chatter near the top of your flue, or rain falls directly into the fireplace during winter storms.
What it costs in Walnut
Chimney cap installation in Walnut typically runs between $250 and $575 with the cap included.
How we do it
We measure the flue opening, mount a stainless cap custom-fit to your chase or flue tile, and secure it so it stays put through wind and rain.
Chimney Cap Replacement
Signs you need it
Your current cap is rusted through, bent, or blown off entirely after a Santa Ana wind event.
What it costs in Walnut
Replacing a damaged cap in Walnut typically costs between $195 and $485 depending on the existing setup.
How we do it
We remove the old cap, check the flue underneath for damage, and install a new stainless steel cap sized to your flue.
Chimney Liner Installation
Signs you need it
You see cracked flue tiles on camera, notice exhaust odor inside the home, or the chimney was built before 1990 and has never had its liner replaced.
What it costs in Walnut
A full DuraFlex stainless liner installation in Walnut typically ranges from $1,500 to $2,300 depending on the flue height and access.
How we do it
We size the DuraFlex liner to your flue, feed it down from the top, and secure the connections so the entire exhaust path is sealed and insulated.
Chimney Flashing Repair
Signs you need it
You see a water stain on the ceiling near the fireplace, or water beading on the inside of the chimney chase after rain.
What it costs in Walnut
Flashing repair in Walnut usually ranges from $500 to $1,150 depending on how much of the roofline flashing needs replacement.
How we do it
We pull the damaged flashing, inspect the roofline and chimney joint, and install new step flashing with proper sealant so water stays outside where it belongs.
Chimney Crown Repair
Signs you need it
The concrete crown at the top of your chimney is cracked, spalled, or has visible gaps at the flue joint.
What it costs in Walnut
Crown repair in Walnut runs between $350 and $850 depending on the condition and size of the crown.
How we do it
We clean out the damaged concrete, apply a weather-resistant crown sealer, and re-slope the surface so water sheds away from the flue.
What Chimney Repair Costs in Walnut
| Item | Typical range in Walnut |
|---|---|
| Chimney cap replacement | $195 – $485 |
| Chimney cap installation (with cap) | $250 – $575 |
| Flashing repair | $500 – $1,150 |
What pushes the price up in Walnut is access and roofing material. Tile roofs are common here, and working safely on tile without cracking it takes more time than working on asphalt shingles. A chase cover hidden behind stucco also adds labor if we need to cut an access panel. You’ll know the full price before we start, and we never pad the estimate with work the camera doesn’t show.
Does a cracked flue liner always need replacement?
Not always. If the cracks are minor and the liner is otherwise intact, we can often restore it with HeatShield, a cerfractory sealant applied directly to the flue walls. That’s a repair, not a replacement, and it costs a fraction of a full liner install. Call us at (844) 821-5749 for a camera inspection, and we’ll show you exactly what we see before recommending anything.
How long does a chimney liner install take in Walnut?
Most liner installations in Walnut are done in a single day. The flue heights on these 1980s and 1990s homes are fairly standard, and the DuraFlex liner system doesn’t require tearing out masonry. We schedule around the dry season when possible since roof work is safer and faster when the tile isn’t wet.
Brands We Service in Walnut
We work with products from Olympia Chimney, Famco, Copperfield, and DuraFlex, and we keep common caps, dampers, and liner components stocked. That means most repair jobs in Walnut don’t have to wait on a part. See our brands page for the full list of what we service and install.
See the difference
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After
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AfterPricing for Chimney Company in Walnut, CA
| Service | Typical range in Walnut |
|---|---|
| Chimney sweep (gas or wood) | $169 – $325 |
| Dryer vent cleaning | $95 – $175 |
| Chimney cap replacement | $195 – $485 |
| Chimney cap installation (with cap) | $250 – $575 |
| Chimney flashing repair | $500 – $1,150 |
| Chimney crown repair | $350 – $850 |
| Chimney liner installation (DuraFlex) | $1,500 – $2,300 |
Two things push prices toward the higher end in Walnut: tile roof access and the age of the original chase. Homes built in the 1980s with factory-built chimneys often need more flashing work because the original materials have baked in the SGV sun for forty years. You’ll get a fixed quote before we start, and the price we quote is the price you pay.
Neighborhoods We Serve in Walnut
We work throughout Walnut, including the planned communities along Grand Avenue, the hillside streets near Snow Creek Park, and the older lots east of Lemon Avenue. Because Walnut’s subdivisions are compact and the streets are easy to navigate, most repair and sweep appointments can be scheduled within a few days, not weeks.
- The Summit Estates area
- Walnut Hills near Snow Creek Park
- Creekside and Timberline communities
- The tract homes along Grand Avenue
- Lemon Avenue and the eastern hillside lots
Service Area – Cities Near Walnut
Walnut sits right between the San Jose Hills and the 60 freeway, and a lot of our work takes us just over the city line. We regularly schedule chimney repairs and vent cleanings in Rowland Heights, CA, West Covina, CA, Pomona, CA, and South San Jose Hills, CA. If you’re in any of those nearby communities, the same crew and the same flat-price promise apply.
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 Company in Walnut
Most Walnut repair calls are scheduled within three to five business days. For urgent issues like water actively leaking into the house or a strong exhaust odor when the gas logs run, we keep slots open earlier in the week for exactly those situations.
It depends on your community. Some Walnut HOAs require approval for exterior changes like a new chimney cap or a visible chase repair, while others only care about roofline color matching. We provide a written description and photos if your HOA needs documentation before work starts.
No. Fall is the busiest season because that’s when Walnut homeowners fire up their gas logs for the first time, but we repair chimneys, install liners, and clean dryer vents year-round. Summer is actually a good time for liner work since the roof access is safest in dry weather.
What happens when you call
- 1A real person answersNo phone trees — talk to a local chimney cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Walnut Customers Say
"Crown was cracked and taking water. Repaired it rather than quoting a rebuild, which the previous company had pushed hard for."
— Gilbert Garcia"They were the only ones willing to just tell me the price. Everyone else wanted to "come take a look" first, which in my experience means come apply pressure in person."
— Matt Delaney"Level two inspection before we bought the house. The report was detailed enough to use as a negotiating point and he explained every photo in it."
— Diego Delgado