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 Excelsior
A chimney sweep in Excelsior usually costs between $189 and $329 for a standard cleaning and inspection, depending on how much creosote or soot has built up inside the flue. If you’re in the 94112 ZIP code and your house was built between 1920 and 1950, your chimney probably isn’t venting a fireplace at all. It’s venting your gas water heater or furnace through an unlined brick chase that was never designed for that job. That’s the reality of most Excelsior work, and it’s why our phone rings more about carbon monoxide risk than creosote. Call (833) 620-7061 and we’ll schedule a camera-first look at what’s actually inside your flue.
Why Chimney Sweep Alamo Square Is Excelsior’s Preferred Chimney Sweep Company
We’re not a one-truck sweep crew that shows up, runs a brush, and hands you a bill. Doug Lockhart built this company around a full-scope approach: the sweep, the dryer vent, and the repair all under one call. That matters in Excelsior because the houses here weren’t built for modern gas appliances, and the problems we find are rarely as simple as dirty brick.
Our reputation in the 94112 comes from honesty on the jobsite. When a homeowner near Geneva Avenue booked us for a fireplace they never used, we ran the camera and showed them the flue was actually venting the water heater in the rear unit. We capped the orphaned opening and installed a properly sized liner. No pressure, no vague “it’s failed” talk. Just footage they could see. That’s the standard for every Chimney Sweep visit we do.
Response time to Excelsior is same-week in most cases. We run routes through the whole southern tier of the city, and Excelsior’s dense street grid between Mission Street and Alemany Boulevard means we can move from one appointment to the next without losing half a day crossing town.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Chimney Cleaning in Excelsior
Chimney cleaning in Excelsior means something different than it does in most neighborhoods. Here, the flue is usually unlined brick, built for coal or wood in the 1920s through 1940s, and now venting a gas appliance. We clean the chase, but we’re also checking the vent connector, the mortar joints, and the termination point because a cold, unlined chimney pulling damp fog air is a draft problem waiting to happen. A standard cleaning and Level 1 inspection in Excelsior runs $189 to $249. If the flue hasn’t been touched in years, expect the creosote removal and soot removal work to push that toward $329.
Camera-Verified Before Anything Else
We don’t recommend a liner, a crown rebuild, or a single tuckpoint without camera evidence. You see the footage. You decide. Most Excelsior homeowners have never seen the inside of their own chimney, and once they do, the decision is usually obvious. No scare tactics needed.
The Gas Appliance Check
Every sweep in Excelsior includes a combustion-appliance vent check. We look at the water heater and furnace flue connection, because in a 1940s two-unit row off Mission Street, the chimney that looks decorative from the street is often the only exhaust path for a gas appliance. That’s the part most sweep companies skip.
Fireplace Cleaning in Excelsior
Fireplace cleaning in Excelsior is actually less common than chimney cleaning for gas appliances. The neighborhood’s mild climate means most fireplaces sit unused for years, sometimes decades. But even an unused fireplace connected to a shared chimney chase needs attention, because that chase may also vent a water heater in the unit next door. A standard fireplace cleaning here runs $189 to $279, a bit higher if we’re pulling years of soot from the smoke shelf and damper area.
What We Remove
Soot, creosote, and whatever the fog belt has deposited in a cold flue over the years. Excelsior’s damp summer air keeps chimneys cool, and cool chimneys collect condensation. That condensation mixes with soot to form an acidic paste that eats at old mortar. We remove it before it becomes spalling.
When to Book
If you burn wood even a few times each winter, book an annual sweep before the first fire. If you never burn but have a gas water heater venting through the chimney, book once every two years and make sure the vent connector gets inspected each time. In Excelsior, the gas appliance is the real reason to keep the flue clean.
Trusted Brands We Service in Excelsior
We stock and install professional-grade materials from the brands serious chimney pros specify, not hardware-store substitutes. That means HeatShield for liner resurfacing and joint sealing on Excelsior’s aging brick chases, DuraFlex liner systems when a full relining is actually warranted, and Gelco chimney caps to keep fog-driven moisture out of cold flues. We also work with Olympia Chimney and Famco components where the repair calls for HVAC-grade vent hardware. Most Excelsior supply houses don’t carry these lines. We do, and we bring them with us on the truck.
Common Chimney Sweep Problems We See in Excelsior Homes
- Unlined chases venting gas appliances. The original brick chimney was built for coal or wood, then a gas water heater got tapped into it decades later. The flue was never lined for that use, and the interior brick is slowly absorbing acidic exhaust. This is the number one thing we find.
- Missing inspection access to the flue. Many Excelsior homes have the furnace and water heater sharing a chase with no cleanout door at the base. We often need to cut access during the first visit just to see what’s happening.
- Moisture-driven mortar spalling hiding behind stucco. Excelsior’s fog belt keeps exterior chimneys damp for months. The interior chase stays cold, and original 1930s mortar quietly crumbles behind intact stucco until a rain event pushes water through the crown.
- The “fireplace never used” trap. Homeowners skip sweeps because they don’t burn wood. The flue is still venting a gas water heater, and nobody has looked at the vent connector in years. A cleaning call often turns into a CO-safety correction.
See the difference
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AfterPricing for Chimney Sweep in Excelsior, CA
We Also Serve Cities Near Excelsior
Our trucks cover the whole southern half of San Francisco, including Excelsior and the surrounding neighborhoods. Diamond Heights, Glen Park, Noe Valley, and Twin Peaks all get the same camera-first, explain-what-we-find service. If you’re on the edge of the 94112 or just across the line, call and we’ll tell you straight whether you’re in our regular route.
Serving Excelsior, CA – Our Local Coverage Area
We’re based in the Excelsior area and provide Gelco service in Excelsior, so we 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 Excelsior
Yes, but not for the fireplace. Your chimney is likely venting a gas water heater or furnace, and that flue needs to be inspected for carbon monoxide clearance even if the firebox stays cold. In Excelsior, the fireplace is usually the least important part of the system. Call (833) 620-7061 and we’ll check the whole chase, not just the part you see from the living room.
Because they were built between 1920 and 1950 for coal or wood, when direct brick flues were standard practice. Gas appliances were later tapped into those same chases, and nobody retrofitted a liner. The brick was never meant to handle that exhaust. That’s why we camera-inspect every Excelsior flue before offering any recommendation.
It does. A cold chimney in the fog belt draws condensation instead of exhaust, especially in spring and summer. That moisture mixes with soot to form an acidic residue that eats original mortar from the inside. The exterior stucco hides the damage until the crown or flashing fails. An annual sweep removes the residue before it accelerates spalling.
You’ll see the camera footage yourself. We don’t recommend a liner, a crown rebuild, or HeatShield resurfacing without showing you the inside of the flue on screen. If the brick looks intact and the vent connector is clean, we’ll tell you to skip it and save your money. That’s the whole point of the camera. Call (833) 620-7061 and you’ll see what we see before you spend a dollar.
Not every year. Every two years is enough for most Excelsior homes that only vent gas appliances. Unless you have an older water heater, a sagging vent connector, or a history of backdrafting, a Level 1 inspection every other year catches problems before they become carbon monoxide risks. If anything looks off during that visit, we’ll tell you then.
Book Your Excelsior Chimney Sweep Today
If your chimney was built before 1950, it’s probably not doing what you think it’s doing. Let’s find out together, camera first. Call (833) 620-7061 for a free, no-pressure estimate. Doug Lockhart and the team at Chimney Sweep Alamo Square serve the entire 94112 and surrounding neighborhoods. You’ll get straight answers, footage you can see for yourself, and a recommendation you can actually trust. Call us before the next fog rolls in.
Written by Doug Lockhart, Owner at Chimney Sweep Alamo Square, serving Excelsior and the greater San Francisco area.