Masonry repair
Sweep & inspection
Caps & crowns
Flue relining
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 Repair for Walnut Homeowners
Chimney repair in Walnut, CA covers everything from cracked crowns and leaking flashing to damaged flue liners and missing caps. Most repairs fall between $300 and $1,800 depending on how much Chimney Repair costs and what’s wrong, and catching the problem before water or heat does real damage saves you the cost of a full rebuild later. Walnut Chimney handles the whole job from the firebox to the cap using professional-grade materials like HeatShield and DuraFlex, so nothing gets patched half-heartedly. Russ Dempsey and our crew work on chimneys all over Walnut, and we’re one call away at (855) 341-3461 for a straight, no-obligation assessment.
What sets us apart is simple: we sweep, we clean dryer vents, and we repair. One company means one standard of quality, one team that knows your flue, and no finger pointing when something needs follow-up work.
Chimney Cap Installation
Chimney Cap Installation is the process of fitting a protective cover over the top of your flue to keep rain, animals, and debris out while letting smoke and gases escape. Every year we see Walnut homes with water-stained fireboxes or nesting materials pulled out of flues that had no cap at all, or one that rusted through. Walnut Chimney installs caps sourced from Gelco and Copperfield, matched to your flue size and venting needs, so the draft stays right and the wildlife stays out. A basic cap install in Walnut typically runs $250 to $600 including the part and the labor to secure it properly.
What a Cap Actually Protects
Rain entering an uncapped flue mixes with creosote and accelerates liner deterioration. A quality cap with proper screening also prevents birds and squirrels from building nests that block venting and push carbon monoxide back into the house.
Custom Fit, Not One-Size
Flues come in standard sizes, but the mounting surface matters. We measure the crown condition and fasten the cap so it holds through Santa Ana winds and years of wet winters.
Styles & brands we work with
Chimney Cap Replacement
Chimney Cap Replacement is what you need when the original cap has rusted, bent, or worked loose over time. In Walnut we see caps fail most often on older masonry chimneys where the mortar anchoring has cracked and the cap wobbles, or on pre-fab caps where the galvanized mesh has corroded through. Walnut Chimney removes the old unit, cleans the mounting surface, and installs a new cap using Gelco or Copperfield components sized to your flue. Expect replacement to run $275 to $650 depending on access and the cap style you choose.
Rust Through Is a Structural Signal
A cap that has rusted through usually means water has been entering the flue for at least a season or two. We check the liner and crown during the replacement so a small cap fix doesn’t mask a bigger problem above the roofline.
When Wind Exposes a Bad Install
Loose caps rattle, lift, and eventually fly off in high wind. If you hear metallic noise from the chimney during gusts, the cap is failing and should be replaced before the exposed flue takes on water.
Chimney Liner Installation
Chimney Liner Installation means putting a new protective sleeve inside your flue, either because the old clay tile liner has cracked or because an appliance venting change requires one. We see cracked liners all over Walnut in chimneys built before the 1990s, where heat cycles and years of moisture have split the clay tiles. Walnut Chimney installs DuraFlex flexible liner systems that meet code and handle the heat load of either a fireplace or a gas appliance. A full liner installation in Walnut generally runs $2,200 to $4,500 for a single-story home, depending on flue height and access.
HeatShield as a Lower-Cost Path
When flue tiles have surface cracks but the structure is otherwise sound, HeatShield ceramic resurfacing can seal the interior without a full liner pull. It costs less than a liner replacement and restores a continuous, insulated flue surface.
Why Liner Condition Matters for Insurance
Many home insurers now ask about liner condition before covering fire claims. A documented liner installation with a post-job photo report gives you a record that the flue was brought to a safe, code-compliant condition.
Chimney Flashing Repair
Chimney Flashing Repair addresses the metal joints where the chimney meets the roofline, which is the most common source of chimney-related roof leaks in Walnut. Flashing rusts, lifts, and separates as the roof and chimney expand and contract at different rates, and once a gap opens, water gets behind the shingles and into the attic. Walnut Chimney repairs or replaces damaged flashing using materials matched to the roof pitch and chimney geometry. Flashing repair in Walnut typically costs $400 to $1,200 depending on whether we’re patching a small section or pulling and replacing the whole assembly.
Caulk Is Not a Repair
Roofing tar and caulk squeezed into a flashing gap will fail within a season or two because the joint keeps moving. Our fix uses overlapping base and cap flashing cut to the actual chimney dimensions, so water sheds away from the joint for years, not months.
The Leak That Shows Up Two Rooms Away
Flashing leaks often travel along ceiling joists and show up as a stain nowhere near the chimney. If you’ve had recurring ceiling discoloration after heavy rain, the flashing deserves a look before you repaint.
Chimney Crown Repair
Chimney Crown Repair is the restoration of the concrete or masonry slab that caps the chimney chase and directs water away from the flue. Crowns in Walnut crack from decades of sun exposure, temperature swings, and the freeze-thaw cycles that happen even in Southern California winters on damp nights. Walnut Chimney repairs crowns with proper slope and materials that stand up to the local weather. Crown repair runs $500 to $1,500 in Walnut depending on the size of the crown and whether we’re filling cracks or rebuilding the entire slab.
Why Flat Crowns Fail
Many chimneys in the area were built with a flat cement crown, which pools water and cracks quickly. We rebuild with a proper slope away from the flue and a drip edge so water runs off instead of soaking into the masonry below.
The Crown Is the First Line Against Liner Damage
Water entering through a cracked crown ends up in the smoke chamber and flue, where it slowly degrades liner tiles. Fixing the crown early prevents a much larger liner replacement bill down the road.
Chimney Repair Companies
Chimney Repair Companies should give you more than a driveway estimate and a two-week callback. In Walnut you’ll find a mix of general handyman services and Chimney Repair – Garden Grove firms, and the difference comes down to repair capability. Walnut Chimney carries the materials and the brand relationships, DuraFlex for liners, HeatShield for resurfacing, Gelco and Copperfield for caps and components, that let us actually repair what we find on the first visit. Most repair calls in Walnut run $300 to $1,800, with liners at the top of that range and cap work at the bottom.
We Sweep, We Clean, We Repair
Some companies sweep and then refer repair work to another contractor. We bring the full toolkit on the same call, so a sweep that uncovers crown cracks or a failing liner turns into a fixed problem, not a second phone number to call.
Camera Inspection Before You Spend
We run a camera through the flue and show you the images before recommending any repair. You see what we see, and nothing gets recommended that isn’t visible on screen.
Chimney Masonry Repair
Chimney Masonry Repair handles the brick, stone, and mortar that make up the chimney structure. In Walnut homes we commonly repair spalled bricks, deteriorated mortar joints, and the water damage that comes from years of climbing damp. Walnut Chimney matches mortar color and brick texture so the repair blends rather than looking like a patch. Masonry work in Walnut starts around $500 for small repointing jobs and runs up from there depending on the area and the condition of the underlying structure.
Repointing Versus Rebuilding
Repointing means cutting out and replacing the outer layer of worn mortar. When bricks themselves have cracked or spalled, we remove and replace them individually, which costs more but preserves the structural integrity of the chimney.
Masonry That Lets Water In
Worn mortar joints act like a sponge. Once water penetrates the masonry, every heating cycle expands the moisture and accelerates spalling. We address the water path first, then repair the masonry, so the fix lasts.
Brands We Service
We work with four professional-grade brands that cover the full range of chimney and vent repair: Copperfield, DuraFlex, HeatShield, and Gelco. Each one has a specific job it does best, and we choose the right material for the repair rather than forcing whatever is on the truck.
DuraFlex liners are our go-to for flexible flue relining where the existing clay tile is cracked or missing. We’ve installed hundreds of feet of DuraFlex in Walnut chimneys, and the brand’s weld-free construction means the liner stays gas-tight through thermal cycling. HeatShield handles flue resurfacing when a full liner pull is overkill, sealing surface cracks with a ceramic material that restores a safe interior profile. For caps and exterior components we turn to Copperfield and Gelco, which make heavy-gauge steel and copper caps that hold up to Southern California sun. Call us whether you have one of these brands or something else entirely, and we’ll tell you straight what the repair requires.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Water in the firebox after rain. If you see puddles or damp ash inside your fireplace, water is bypassing the cap, crown, or flashing. Every wet cycle accelerates liner and masonry damage, and the fix is almost always less expensive than waiting.
- White staining on the exterior brick. The chalky white residue, called efflorescence, means water is moving through the masonry and depositing salts on the surface. It’s visible proof that the chimney is absorbing water, and the masonry is slowly breaking down from the inside.
- Crumbled mortar joints or chunks of brick on the ground. Spalling and joint failure don’t reverse themselves. Once mortar starts falling out, the chimney loses structural stiffness and water gets deeper into the chase.
- A rusted or missing cap. The cap is the only thing between your flue and every rainstorm, bird, and squirrel in Walnut. A failed cap means direct water entry and the risk of a blocked flue from nesting material.
- Smoke backing into the room. Poor draft can come from a blocked flue, a cracked liner, or an improperly sized cap. It’s also a carbon monoxide warning sign, and it needs attention before you light the next fire.
Our Process, Step by Step
- 1
We listen to what you’re seeing. Whether it’s water stains, a loose cap, or smoke in the living room, your description tells us where to begin. We ask about fireplace use, recent weather, and anything you’ve noticed from the roof or the ground.
- 2
We inspect from the firebox to the cap. Russ Dempsey or one of our technicians runs a camera through the flue, checks the smoke chamber, examines the crown and flashing, and documents everything with photos. You get to see the condition of your chimney, not just hear about it.
- 3
We tell you what actually needs fixing. Some findings are urgent, some can wait, and some are cosmetic. We differentiate between the three and give you a scope of work with the materials specified, DuraFlex for liners, HeatShield for resurfacing, Gelco or Copperfield for caps.
- 4
We do the repair with the right material. No silicone smeared where flashing should be, no universal cap clamped onto a flue it doesn’t fit. Every repair uses the material matched to the problem, installed to the manufacturer’s spec.
- 5
We show you the finished job. After the work is done, we walk you through what changed and hand you photo documentation for your records. That paperwork matters for insurance and for resale, and it’s proof of what was actually done.
How Much Does Chimney Repair Cost in Walnut?
A typical chimney repair in Walnut runs $300 to $1,800, with the spread driven almost entirely by the part of the chimney that’s failing. Cap installation or replacement sits at the low end, usually $250 to $650. Flashing repair lands in the middle, around $400 to $1,200. Crown repair runs $500 to $1,500 depending on size. Masonry repointing starts near $500 and goes up with the affected area. Liner installation is the biggest line item, with full relining running $2,200 to $4,500 for most single-story homes.
What moves the price: roof pitch and chimney height for anything done above the roofline, the extent of water damage already present, and whether the repair exposes additional issues. Brick chimneys in Walnut built before the 1990s often have multiple overlapping problems, and fixing them in sequence costs more than addressing them together.
The best way to avoid overpaying is to ask for camera evidence before approving any liner work, and to get a scope of work that names the materials. Our estimates are free, and every one includes a photo-backed explanation of what needs attention now versus what can wait.
Our Service Area Near Walnut
Walnut Chimney serves Walnut and the surrounding communities, including West Athens, North El Monte, Torrance, Boyle Heights, Coto De Caza, East San Gabriel, Westmont, Alondra Park, Citrus, Mayflower Village, Rolling Hills Estates, and Temple City. If you’re outside those areas, call anyway and we’ll tell you if we can get to you. For context on the range of problems we handle across different neighborhoods, see our pages on Chimney Repair in West Athens, Chimney Repair in North El Monte, and Chimney Repair in Torrance. Whether you need a home chimney assessment or a full repair, the first call is always free.
Serving Walnut, CA — Our Local Coverage Area
We’re based in the Walnut area and know this community well, including Chimney Repair in Stanton. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Chimney Repair in Walnut
Chimney repair is any work that restores the safety and function of the chimney structure, including the cap, crown, flashing, liner, and masonry. It ranges from replacing a rusted cap to relining a cracked flue, and it’s what keeps your chimney venting smoke and gas properly while water stays out of the house. A good repair adds years to the life of the chimney and prevents the need for a full rebuild.
Most cap, flashing, and crown repairs in Walnut are completed in a single visit lasting four to six hours. Liner installation or significant masonry work may take two full days depending on access and the materials involved. We’ll give you a written timeline with the estimate, and usually stick to it.
In Walnut, expect $300 to $650 for cap work, $400 to $1,200 for flashing, $500 to $1,500 for crowns, and $2,200 to $4,500 for liner installation. The exact price depends on roof access, chimney height, and the condition of the surrounding structure. Call (855) 341-3461 for a free estimate that includes camera documentation of the problem.
Yes, we install and repair all four brands, and we stock their components for faster turnarounds. If your existing chimney has one of these systems and it’s failing, we can assess whether a repair of the same brand makes sense or whether a different material fits the problem better. We’ll never push a full replacement just because a component needs fixing.
We prioritize chimney repairs that carry immediate safety or water-intrusion risk. If you have water actively entering the home or a flue blockage preventing safe venting, tell us when you call at (855) 341-3461 and we’ll schedule you at the front of the line. Standard repairs are booked on our normal schedule, typically within a week or two.
Every repair we perform follows the manufacturer’s spec for the material involved, and we stand behind our workmanship. We’ll give you documentation of the materials used and the installation, which is what most manufacturers require for their own warranties. If something fails because of our workmanship, we’ll make it right.
Keep the area around the fireplace clear of furniture or decor, and if we’re working on the roof, move any vehicles out of the driveway for ladder access. Pets should be secured away from the work area. Beyond that, you don’t need to do anything; we’ll handle the protection of your floors and furnishings while we work.
Schedule Your Chimney Repair Service in Walnut Today
Chimney problems get more expensive the longer they wait, and water damage never pauses for the season. Call Walnut Chimney at (855) 341-3461 for a free, no-obligation estimate, or see our Chimney Repair in Westminster. We’ll inspect the chimney from the firebox to the cap, show you what’s actually wrong on camera, and repair it with the material that fits the job. You’ll get a straight answer and a fair price, with no pressure to do work you don’t need.
Written by Russ Dempsey, Owner at Walnut Chimney, serving Walnut and the surrounding communities.