Licensed, insured, and obsessed with safety—your fireplace is a ticking time bomb until we inspect it. Book your **chimney sweep** before the next dry winter storm hits the Bay.
Comprehensive chimney sweep for San Francisco homes and businesses.
Removes flammable creosote buildup—**the #1 cause of chimney fires**—using vacuum-assisted tools to leave zero mess. Includes **SF Building Code compliance check**.
Detects **silent CO leaks** from cracked flues or blocked vents—**before poisoning becomes the headline**.
Fixes **cracks, rust, and collapsed liners**—the hidden causes of **smoke backflow and CO buildup**—with **stainless steel or ceramic relines**.
Rebuilds **crumbling brick, leaking mortar, and water-damaged foundations**—**before SF’s rainy season turns your chimney into a rotten hazard**.
24/7 **fire suppression and cleanup**—we’ll **extinguish, contain, and repair** damage from chimney fires **before SF’s fire department arrives**.
No-pressure **on-site risk assessment**—we’ll tell you **exactly what’s wrong** (and what’s not) with your chimney, **no sales pitch**.
We hold ourselves to the highest standards so you can hire with total confidence.
Your **Victorian-era chimney** in the **Haight** or **1950s masonry flue** in the **Mission** wasn’t built for today’s **low-emission fires or synthetic logs**. **Cracks, rust, and deteriorated mortar** let **CO and sparks escape**—often **silently**. We’ve seen **dozens of SF chimneys** where **improper relining** or **missing dampers** created **fire hazards**. **Don’t assume ‘it’s always worked’ means it’s safe.**
That **black, tarry residue** in your chimney isn’t just dirty—it’s **Stage 3 creosote**, a **highly flammable** substance that **ignites at 1,100°F**. **SF’s dry summers** turn creosote into a **ticking bomb**. **One spark** (from a **hot ember or wind gust**) can **flash-fire** your chimney in **seconds**. **We remove it all**—even the **glassy, fire-prone layers** most sweeps miss.
**CO poisoning from chimneys** is **silent, odorless, and deadly**—especially in **SF’s tightly sealed homes** or **condos with poor ventilation**. **Cracked flues, blocked vents, or rusted dampers** let CO seep into **bedrooms and living rooms**. **Last winter, a family in the Sunset** nearly suffered poisoning because their **1930s chimney** had a **hidden fracture**. **We test for leaks**—**before your detector even sounds.**
San Francisco’s **Building Code (Section 2104)** requires **annual inspections, proper clearances, and **relining for certain repairs**—or **insurance can deny claims**. **We handle the paperwork** so your chimney **passes inspection** and **stays compliant**. **Skipping this? You’re gambling with your home’s value—and your safety.**
San Francisco’s historic homes and modern fireplaces rely on one critical service: a **chimney sweep** that goes beyond routine maintenance. At Owen and Rosales Chimney LLC, we treat every inspection like a fire-prevention audit, not just a cleaning. Our team combines decades of experience with the latest EPA-approved techniques to eliminate creosote buildup—the leading cause of chimney fires in Bay Area homes—before it becomes a hazard. Unlike generic crews, we focus on the *why* behind every finding, so you understand the risks (like undetected carbon monoxide leaks or cracked flue tiles) and how to fix them before they escalate. In a city where old brick fireplaces meet high-tech heating systems, our approach is tailored to San Francisco’s unique climate and building codes.
"We had **orange flames shooting out of our chimney** during a fire last December—**scared the kids**. Owen and Rosales arrived in **under 90 minutes**, **extinguished the spark**, and **relined the flue** before the fire department even got there. **Saved our home—and our sanity.** Their **emergency response** is **worth every penny.**"
"Our **1920s brick chimney** was **leaking CO**—we didn’t know until their **safety inspection** caught it. They **repointed the mortar, relined the flue, and installed a **CO alarm** (included in the package). **Now we sleep at night.** No other chimney sweep in SF **cares this much about prevention.**"
"I **hated** the idea of a chimney sweep—until I saw the **glassy creosote** they pulled out of my flue. **It looked like tar**. They **cleaned it in one visit**, and the **smoke draft improved instantly**. **No more coughing when I light the fire.** Best **San Francisco chimney sweep** I’ve found—**actually explains what they’re doing.**"
"Our **condo’s chimney** was **backing smoke into the living room**—turns out the **liner was rusted through**. They **replaced it with stainless steel** and **sealed the joints**. **No more smoke in the house**, and the **fireplace drafts better than ever**. **SF’s Building Code requires this work**—they made it **painless.**"
"We **skipped chimney sweeps for years**—big mistake. When we finally called, they found **Stage 3 creosote** and a **cracked flue**. **One spark could’ve burned down our home.** They **cleaned, relined, and restored the masonry**—**now we’re protected**. **Don’t wait until it’s too late.**"
"I **didn’t think I needed a sweep**—until they **tested for CO** and found a **leak**. They **fixed the flue, repointed the brick, and gave us a free CO detector**. **Now I know my chimney is safe.** **No other company in SF offers this level of care.**"
Expert local advice for San Francisco homeowners.
Expert advice on chimney relining and repair in San Francisco
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Read more →We arrive with **LED borescopes and CO detectors** to **scan your flue, check for cracks, and test for gas leaks**—**no pressure to book**. If your chimney’s **clean and safe**, we’ll tell you. **No other San Francisco chimney sweep offers this.**
Using **vacuum-assisted rotary brushes**, we **remove creosote, ash, and debris**—**including hard-to-reach spots** where buildup hides. For **damaged liners or masonry**, we **reline or restore** on the spot. **No overcleaning, no upsells.**
We **check clearances, flue integrity, and ventilation** against **SF’s Building Code**. If your chimney **fails a safety check**, we **flag it immediately**—**no surprises**. **Insurance companies trust our reports.**
You get a **free PDF inspection report** (emailed same-day) with **photos, findings, and next-step recommendations**. **All work comes with a 1-year warranty**—**because we stand by our repairs.**
Proudly serving San Francisco and these nearby communities.
That’s carbon monoxide leaking through a cracked flue liner or blocked chimney, a silent killer in SF’s dense housing. The gas has no smell until mixed with odorants, but the *real* danger is the odorless CO poisoning. Never ignore this—even ‘mild’ symptoms like headaches after a fire mean your chimney needs an *emergency inspection*, not just a sweep. Our crews use CO detectors on-site to confirm leaks before they become fatal. If your chimney’s over 20 years old (common in SF’s older homes), the liner may have deteriorated beyond repair—we’ll tell you straight up if it’s time for a relining.
SF’s dry summer winds and humid winters create the *perfect* storm for creosote buildup. When wood burns incompletely (often from damp logs or poor drafts), it leaves behind sticky tar that hardens into flammable layers. In just *one* heating season, a neglected chimney can accumulate enough creosote to trigger a fire—especially in tight flues common in SF’s older homes. We’ve pulled out *pound-thick* deposits from chimneys swept only once a year. The fix? Hardwood burns cleaner, and our crews adjust your damper for optimal airflow *before* the buildup starts. Skip the ‘quick sweep’—opt for our *creosote-grade* service.
That soot isn’t just dirt—it’s a sign your chimney’s *not* drawing properly, likely due to a clogged flue or weak draft. SF’s windy coastal climate can push smoke sideways, forcing it back into your home. Even a ‘passed’ inspection misses this if the inspector didn’t test draft pressure. Our crews use *smoke puff tests* to spot hidden blockages, like bird nests (common in SF’s tall chimneys) or collapsed creosote chunks. The fix? Often just a damper adjustment or flue brush, but we’ve also found cracked tiles sending soot into living spaces. Don’t wait—soot on the mantel means your fireplace is *working against you*.
Shared chimneys are fire hazards waiting to happen, especially in SF’s older condo buildings where maintenance is often neglected. If your fireplace smokes *only* when neighbors use theirs, the flue’s likely clogged with creosote or debris from multiple users. Our crews inspect *all* connected flues to pinpoint the source—sometimes it’s a single unit’s poor burning habits affecting the whole stack. We’ve seen cases where one condo’s blocked damper caused CO alarms to go off *three floors down*. If you’re in a shared setup, demand a *full-stack inspection* (not just your section) and ask for our *condo chimney safety checklist*—it’s the only way to prove your unit isn’t the weak link.
Absolutely. SF’s coastal winds create *reverse drafts* that push smoke back into your home, especially in tall chimneys near the Presidio. A weak draft isn’t just annoying—it’s a fire risk, as unburned gases linger and coat flue walls with flammable creosote. Our crews adjust dampers and test for wind-induced blockages using *anemometers* (not guesswork). If your chimney’s over 30 feet tall (common in SF’s hillside homes), we might recommend a *draft inducer fan* or relining to combat the wind. Never blame ‘old age’—a pro can fix this before your next fire.
That’s *not* mold—it’s **efflorescence**, a sign your chimney’s bricks are absorbing moisture, often from SF’s foggy winters or leaky roofs. While harmless to touch, it’s a red flag for hidden masonry damage. Left unchecked, water seepage can erode mortar, crack flue tiles, and create pathways for CO gas. Our crews check for *water stains* in the flue and inspect the roof for missing cap seals. If your chimney’s over 50 years old (like many in SF’s historic districts), we’ll recommend a *waterproofing treatment* to prevent costly repairs. Don’t ignore the powder—it’s your chimney’s way of screaming for help.
An eroded liner is a *ticking time bomb*, especially in SF’s older homes where thin liners were standard. It means the metal (or clay) barrier between your fire and your home’s structure is thinning, risking heat transfer to combustible walls or CO leaks. Our crews use *endoscopes* to measure erosion—if it’s over 50% worn, the liner must be replaced *immediately*. We’ve seen cases where a small crack in a liner caused a gas line to overheat, triggering a kitchen fire. Don’t gamble with this—our *emergency liner replacement* service includes a full safety audit to ensure no other damage was missed.
No—and doing it wrong could void your insurance or start a fire. SF’s HOAs require *certified* sweeps because amateur jobs often miss critical risks, like leaving creosote behind or damaging the flue with the wrong tools. Our crews use *rotating brushes* and *vacuum systems* to remove *all* debris, not just the surface layer. We’ve seen DIY sweeps leave behind *piles* of creosote that ignited weeks later. Plus, HOAs track compliance—if your sweep isn’t documented, you’ll face fines. Let us handle it: we provide *HOA-compliant* certificates and photos of the clean flue. Your fireplace’s safety isn’t worth the risk.
Fast response, upfront pricing, and workmanship guaranteed. Get your free estimate today.