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: cracked clay flue tiles from decades of Santa Ana wind-driven temperature swings, or a mortar crown that’s quietly crumbling under the same stress. Most of the homes we work on here were built in the 1980s and 1990s, which means their original clay-tile flues are now entering the age where deterioration shows up on a camera inspection. If you need a chimney swept, a dryer vent cleared, or structural work done right, call Ontario Chimney at (833) 467-7685.
Why Walnut Homes Are Different
Walnut sits against the San Gabriel Valley’s hotter, drier eastern edge, and the weather pattern here is hard on masonry chimneys in a way homeowners don’t always expect. Summer temperatures routinely climb past 90 degrees, and when the Santa Anas blow through in fall, they push hot, dust-laden air over every exposed surface. A clay flue tile expands in that heat, contracts when a cool evening settles in, and over thirty-some years those cycles create hairline cracks that widen into real problems.
The housing stock concentrates the issue. Most of Walnut’s inventory is 1980s and 1990s stucco tract and semi-custom homes, and the standard build of that era was a masonry fireplace with a clay-tile flue and a poured mortar crown. Builders did fine work for the time, but nobody in 1988 designed a chimney crown to survive forty years of thermal cycling. We routinely find crowns with full-length cracks running from the flue opening to the outer edge, which lets water into the chase and accelerates everything else. On the wooded foothill edges, uncapped flues collect bird nests and debris, which is why a camera inspection is part of how we start.
Hillside properties and larger-lot homes around the foothills add another layer, since many of them include outdoor fireplaces or a second flue serving a downstairs den or primary suite. Each flue has its own liner, its own crown, and its own wear pattern. That’s normal, but it means a one-size homeowner checklist doesn’t always apply here.
Styles & brands we work with
Our Main Walnut Services
The two calls we get most from Walnut homeowners are the annual sweep and the dryer vent line, and both are jobs where a few local details change how they go.
Chimney Sweep in Walnut
A chimney sweep in Walnut usually starts with a fireplace that burned all winter and now smells when the AC kicks on or when a Santa Ana gust pushes down the flue. We run a camera first, not after, because cracked clay tiles are common enough here that we want to know exactly what the brush is riding over. The sweep itself removes creosote and soot, and the camera footage gives you a look at whether anything needs attention beyond routine cleaning. See the full process on our Chimney Sweep in Walnut page.
Dryer Vent Cleaning in Walnut
Dryer vent cleaning gets overlooked until a load takes twice as long to dry, and in Walnut’s dry season the lint inside a vent line is exactly the tinder you don’t want sitting behind your laundry room wall. Longer vent runs are common in two-story 1980s and 1990s floorplans, and every bend collects lint. This is a standalone service for us, not an add-on, and it’s one of the cheapest fire-safety steps you can take. Details on 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 is rarely a single fix. What typically happens is that a homeowner calls us for a smell or a leak, and the camera finds a cracked flue tile that’s been letting heat through for several seasons, plus a mortar crown that’s losing material around the edges. Those are both things we see monthly in the 91788, 91789, and 91795 ZIP codes, because the original 1980s and 1990s clay-tile flues are hitting the end of their reliable life all at once. Whether we recommend a Chimney Repair that addresses one component or a full relining, you’ll see the evidence on camera before you spend a dollar.
Chimney Cap Installation
Signs you need it
Birds or nesting material inside the flue, water staining around the firebox, or a missing cap you can see from the ground.
What it costs in Walnut
Chimney cap installation in Walnut typically runs $300 to $650 depending on flue size and material.
How we do it
We measure the flue opening, set a stainless cap sized for proper draft clearance, and mechanically fasten it so Santa Ana gusts can’t lift it.
Chimney Liner Installation
Signs you need it
Cracked flue tiles visible on camera, smoke entering adjacent rooms, or a chimney inspection report flagging the liner after a property sale.
What it costs in Walnut
A full chimney liner installation in Walnut is generally $2,500 to $5,000 depending on flue height and access.
How we do it
We size the new liner to the existing flue, use a DuraFlex stainless system when offsets require flexibility, insulate as code requires, and test the draft before we finish.
Chimney Flashing Repair
Signs you need it
Water staining on the ceiling near the chimney chase, damp drywall around the hearth, or visible gaps where roof flashing meets the chimney.
What it costs in Walnut
Chimney flashing repair in Walnut typically costs $350 to $850 depending on roof pitch and how much flashing must be replaced.
How we do it
We remove the old flashing, cut a watertight seal between the chimney and roofline, and check the transition with a water test after resetting.
What Chimney Repair Costs in Walnut
| Item | Typical range in Walnut |
|---|---|
| Chimney cap installation | $300 – $650 |
| Chimney flashing repair | $350 – $850 |
| Chimney liner installation | $2,500 – $5,000 |
How long does a chimney liner last in Walnut?
A stainless liner properly sized and installed in Walnut should last 20 to 30 years, though the crown above it needs resealing every 5 to 10. Annual inspection catches the small stuff early.
Can you repair a cracked flue without replacing the whole liner?
Sometimes yes. HeatShield ceramic resurfacing can restore cracked clay tiles without a full teardown, and we’ll tell you plainly if that’s a viable option for your flue. Call (833) 467-7685 for an exact quote.
Brands We Service in Walnut
Our Walnut trucks are stocked to work on the major chimney component brands, including Famco, DuraFlex, and HeatShield. Common caps, dampers, flashing stock, and liner fittings are on board, which keeps most repairs to a single visit. For more detail on what we service, see our brands.
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 | $180 – $340 |
| Dryer vent cleaning | $100 – $225 |
| Chimney cap installation | $300 – $650 |
| Chimney crown repair | $400 – $1,000 |
| Chimney flashing repair | $350 – $850 |
| Chimney liner installation | $2,500 – $5,000 |
| HeatShield resurfacing | $2,000 – $4,000 |
| Full fireplace rebuild | $5,000 – $12,000 |
Walnut prices shift most with roof pitch and flue access. A two-story chimney with a steep roof takes more setup than a single-story ranch, and that shows up in the quote. We give you a flat price before any work begins, so the number on the estimate is the number on the invoice.
Neighborhoods We Serve in Walnut
We work across Walnut, from the 1980s tract neighborhoods north of La Puente Road to the larger-lot semi-custom homes near the foothills. Most of our Walnut customers are in ZIP codes 91788, 91789, and 91795.
- Snow Creek
- Three Oaks
- Walnut Hills
- Creekside
- Foothill Corridor
We schedule Walnut jobs in half-day or full-day blocks rather than one-hour windows, so you’ll know whether to expect us morning or afternoon.
Service Area – Cities Near Walnut
Ontario Chimney covers Walnut and the surrounding San Gabriel Valley communities, including Rowland Heights, CA, West Covina, CA, Pomona, CA, and South San Jose Hills, CA. The drive time is short, and we group nearby appointments by area most weeks.
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 repair work like cap installation, crown repair, or flashing replacement doesn’t require a city permit. A full liner installation or rebuild may, and we’ll tell you ahead of time if your project falls into that category.
Some Walnut HOAs have rules about visible changes like chimney caps or crown color. We only handle the masonry, but if you have an HOA we recommend confirming any exterior color or cap style rules before we start.
We typically book Walnut jobs a week to ten days out during fall and winter, and shorter in summer. If you’re planning for burning season, a September sweep beats an October one. Call (833) 467-7685 to grab a slot before the rush.
Questions about your chimney or dryer vent? Call Ontario Chimney at (833) 467-7685 for a free estimate. We’ll tell you what we found, show you the evidence, and give you options.
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
"Drop cloths everywhere, HEPA vac, and not a speck of soot on the carpet. I'd been dreading the mess for nothing."
— Bethany Padgett"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."
— Sarah Sullivan"Good work. The written inspection report took about a week to arrive after I asked for it, which was slower than I expected."
— Adriana Morales