Level 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.
Before
After
Before
After
Before
AfterFast, Reliable Chimney Repair Across San Anselmo
Chimney repair in San Anselmo most often means fixing a cracked crown, repointing spalling brick, or relining a flue that was never lined to begin with. A straightforward crown repair here typically runs $450 – $900, while a full flue relining with DuraFlex lands between $2,800 and $5,500 depending on flue height and access. You don’t need to guess at the number. When you call Flint Chimney Sweep at (830) 251-4560, you get a written price before a single tool comes off the truck, and every repair carries our 365-Day Done Right Promise in writing.
We’re part of the Garrison Partners family, which has been operating since 2002. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, and our background-checked, uniformed technicians serve San Anselmo directly. Hank Delano leads our repair crews, and he holds every job to the standard we publish: flat price first, camera evidence second, written guarantee last.
Why Flint Chimney Sweep Is San Anselmo’s Preferred Chimney Repair Company
San Anselmo homeowners keep our number for one reason: we document what we find and we stand behind what we fix. Older hillside homes along Butterfield Road and Center Boulevard don’t give up their chimney problems to a quick visual check. That’s why every repair estimate we write in San Anselmo starts with a camera inspection. You see the cracked flue tile or the spalled brick on the photo report before you approve any work.
The written guarantee matters here. Every repair we complete in San Anselmo includes a written warranty valid for one full year from the service date. If a covered repair fails inside that window, we return and fix it at no charge. No argument, no second invoice. That’s the Garrison Standard, and it applies to every job we do in this town.
Our response time to San Anselmo is straightforward. Phones are staffed by a live person around the clock, so when you call (830) 251-4560 at 7 a.m. or 9 p.m., you talk to a human who can schedule your inspection window. We don’t promise same-day service, because a proper camera inspection takes time to do right. We do promise a technician who arrives in uniform, inside the window we gave you, ready to show you exactly what’s wrong.
Chimney Crown Repair in San Anselmo
Chimney crown repair is the fix we schedule most often for San Anselmo homes under the redwood canopy. The crown is the concrete or mortar cap that seals the top of the chimney stack, and when it cracks, rain and fog drip straight down into the smoke chamber. In shaded yards off Butterfield Road and along the creek side of Fairfax Street, crowns stay damp for months at a time, and small root movement from redwoods and oaks opens hairline fissures that grow every season. A crown repair here usually runs $450 to $900, depending on whether we’re filling cracks with a polymer sealant or building out a new crown form with proper overhang and drip edge.
Cracked Crown Sealing and Resetting
When a San Anselmo crown shows cracks but the concrete is still sound, we clean the surface, fill the fissures with a flexible crown coat, and reset the overhang. This is the work that keeps water out of the smoke chamber and stops your damper from rusting into place. We use Gelco crown sealer on most of these jobs because it bonds well to older aggregate mixes common in pre-1960 San Anselmo masonry.
Full Crown Replacement
If the crown has crumbled at the edges or the flue tiles are exposed, a full crown replacement is the honest fix. We form and pour a new crown with a proper drip edge so water runs off the chimney instead of down the brick. On San Anselmo hillside chimneys where the stack leans slightly, we also check the mortar bed below the crown, because a new crown on a shifting stack won’t last one wet season.
Chimney Repair Companies in San Anselmo
Chimney repair companies in San Anselmo range from solo brush-and-go operators to full masonry crews, and the difference shows up in the photo report. A brush-only sweep will clear third-degree creosote from a firebox but won’t find a cracked flue liner behind the smoke shelf. At Flint Chimney Sweep, every repair estimate begins with a Level 2 camera inspection, because older San Anselmo chimneys with unlined or single-wythe masonry hide damage that a visual check cannot see. A typical repair call here runs $300 for minor mortar patching up to $5,500 for a full relining, always with the price in writing before work starts.
What to Ask Before You Book
Ask any chimney repair company in San Anselmo three questions before you hand over a deposit. Will you show me camera footage of the damage? Is the price in writing before work begins? Is there a written guarantee on the repair, and for how long? If the answer to any of those is vague, keep looking. We answer all three with a yes, before we book.
Why Written Pricing Matters Here
San Anselmo’s housing stock skews older, and older chimneys surprise you. The written price is your protection against a tech finding “one more thing” after the job starts. Our price is fixed before we start, and if we uncover something the camera didn’t catch, we stop, show you the footage, and write a new approval. The number on the invoice is the number you signed.
Trusted Brands We Service in San Anselmo
We install and repair liners, crowns, and waterproofing systems from the manufacturers we trust on the job, not the ones with the best margin. On San Anselmo relining jobs, we spec DuraFlex stainless liners for wood-burning fireplaces and HeatShield for resurfacing existing clay tile. We keep Gelco crown sealer on the truck for crown repairs and use Olympia Chimney components for caps and termination points. When we quote a repair, we name the brand and the part, so you can verify what you’re getting. For most common San Anselmo repairs, parts are on the truck and the job is done in one visit.
Common Chimney Repair Problems We See in San Anselmo Homes
- Spalling brick from hillside moisture. Older masonry chimneys in the Seminary area and Sleepy Hollow sit on soils that shift with every wet winter, and brick faces pop off when trapped water freezes or evaporates. Repointing those bricks before the structural course fails is a $300 to $1,200 job depending on access.
- Cracked crowns under the redwood canopy. Shaded yards off Richmond Road and Butterfield Road keep crowns damp year-round, and root movement from mature redwoods works cracks open. A Gelco crown repair stops the water before it reaches the damper and smoke chamber.
- Unlined flues hiding second-degree creosote. Homes built in San Anselmo before 1960 often have no flue liner or a single-wythe clay tile that has cracked. A brush sweep won’t show the damage; a camera inspection will. If the tile is cracked, we line it with DuraFlex.
- Third-degree creosote glaze mistaken for a simple sweep. Fireboxes that burned decades of mixed green and seasoned wood build a hard, shiny glaze that brushing alone cannot remove. Glaze traps heat against the flue walls and is a chimney fire risk. We remove it chemically before it becomes a structural problem.
Pricing for Chimney Repair in San Anselmo, CA
Here are straight numbers for the San Anselmo market, written so you don’t have to call just to get a ballpark. Minor mortar repointing runs $300 to $1,200 depending on how many courses of brick are involved and whether we need scaffolding on a hillside lot. Crown repair with Gelco sealer runs $450 to $900. Flashing repair around the chimney base runs $350 to $800. A full crown replacement runs $900 to $1,800. Flue relining with DuraFlex, the most expensive common repair, runs $2,800 to $5,500 based on flue height and roof pitch. Every price includes our 365-Day Done Right Promise in writing. Call (830) 251-4560 for a free estimate, and you’ll have the exact number before we book.
We Also Serve Cities Near San Anselmo
Flint Chimney Sweep handles Chimney Repair throughout the Ross Valley and central Marin. If you’re in Fairfax, Kentfield, San Rafael, or Larkspur, the same crew, the same written pricing, and the same one-year guarantee apply. We coordinate all scheduling from our Bay Area office, and our technicians cover the full San Anselmo service area plus the surrounding communities.
Serving San Anselmo, CA - Our Local Coverage Area
We’re based in the San Anselmo 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 Repair in San Anselmo
Once a year if you burn wood regularly, and at minimum once every two years if the fireplace sees only occasional use. The National Fire Protection Association recommends annual inspection regardless of fuel type, but hillside homes in San Anselmo face extra moisture and soil movement that makes an annual Level 2 camera inspection the smart move. Older unlined chimneys in the Seminary area should be checked before every first burn of the season. Call (830) 251-4560 and we’ll schedule a camera inspection with a flat price confirmed before the appointment.
First-degree creosote is a light soot that brushes off during a standard sweep. Second-degree creosote is a flaky, tar-like buildup that requires more aggressive mechanical removal and indicates the fire is burning too cool. Third-degree creosote is a hard, shiny glaze that bonds to the flue walls, traps heat, and is a chimney fire hazard. On older San Anselmo fireplaces that burned mixed green and seasoned wood for decades, third-degree glaze is common, and it cannot be brushed away. We remove it chemically and then camera-check the flue for the cracks that glaze often hides. Call (830) 251-4560 for a camera inspection and a written treatment plan.
No, and any company that gives you a firm repair price over the phone hasn’t looked at your chimney. What we do give you is a written flat price before any work starts, based on a camera inspection we perform on site. You see the footage, you see the written scope, you approve the number, and that number doesn’t change. Estimates are free. Call (830) 251-4560 to book the inspection.
Yes, because water inside the smoke chamber rusts the damper and soaks the flue liner, and once that starts, the repair bill grows fast. A cracked crown on a shaded San Anselmo lot gets worse every time roots shift or a storm blows through. Crown repair with Gelco sealer costs $450 to $900 and usually stops the damage in one visit. Call (830) 251-4560 for a camera view of the crown and a written price to fix it.
Yes. We install DuraFlex stainless liners for wood-burning fireplaces and use HeatShield to resurface cracked clay tile when a full replacement isn’t necessary. We also keep Gelco crown sealer and Olympia Chimney caps on the truck for San Anselmo jobs. The brand is specified in your written quote, so you know exactly what’s going into your chimney before we start.
Call Flint Chimney Sweep for Chimney Repair in San Anselmo
You want the camera footage, the written price, and the one-year guarantee. That’s what we deliver on every job in San Anselmo, from a 1940s bungalow off Richmond Road to a hillside home in Sleepy Hollow. Call (830) 251-4560 for a free estimate. A live person answers, day or night, and your written price is ready before any work begins.
Written by Hank Delano, Owner at Flint Chimney Sweep, serving San Anselmo through the Garrison Partners family since 2002.