Annual chimney sweeping is the single most important thing you can do to prevent chimney fires and carbon monoxide poisoning. We offer no-mess, CSIA-trained chimney cleaning across Greater St. Louis — with a free Level I inspection included.
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The Basics
If you've never had your chimney professionally cleaned, here's exactly what it is and why it matters for your home's safety.
A chimney sweep is the professional removal of creosote, soot, animal debris, and combustion byproducts from inside your chimney's flue, smoke chamber, and damper area. Every time you burn wood — and even with gas fireplaces — these substances build up on the inner walls of your chimney.
The most dangerous of these is creosote — a black, tar-like substance that's the leftover product of incomplete combustion. Creosote is highly flammable. When enough builds up (just 1/8 inch is enough), a stray spark or unusually hot fire can ignite it — causing a chimney fire that reaches temperatures over 2,000°F and can spread to your home's framing within minutes.
According to the CSIA (Chimney Safety Institute of America), more than 25,000 chimney fires occur in the U.S. every year, causing over $125 million in property damage. Most are completely preventable with annual cleaning.
Lowball sweeps often skip the smoke chamber (where most creosote builds up), use undersized brushes that don't actually clean the flue walls, and provide no inspection or written documentation. The price seems good — until you have a chimney fire because the actual creosote was never removed.
Here's the smoke chamber from a recent St. Louis job — the most overlooked area in chimney sweeping. The "before" photo shows years of creosote buildup that "cheap" sweeps never touch. The "after" shows what a proper professional cleaning looks like:
The Stakes
This isn't optional maintenance. Annual chimney sweeping prevents three things that can destroy your home — or kill your family.
A chimney fire is exactly what it sounds like — the creosote inside your chimney igniting and burning at extreme temperatures. Many homeowners don't even know one is happening because the fire is contained inside the flue. But the structural damage is severe: tile liners crack from thermal shock, masonry chimneys can lean or partially collapse, and worst of all, the heat can transfer to wood framing in your walls and start a house fire hours or even days later.
When a chimney is blocked — by creosote, animal nests, or debris — combustion gases including carbon monoxide can back up into your home instead of venting outside. Carbon monoxide is odorless, colorless, and deadly. The CDC reports over 400 unintentional CO deaths per year in the U.S. and 50,000+ ER visits.
Creosote is highly acidic. As it builds up on flue tiles and masonry, it slowly eats away at the materials — leading to cracked liners, deteriorated mortar joints, spalling brick, and eventually catastrophic structural failure. Annual sweeping prevents this damage from compounding year over year.
A $179 sweep prevents a $20,000+ rebuild — or worse.
Warning Signs
If you've experienced any of these issues, schedule an inspection before your next fire — not after.
If smoke spills into your home when you light a fire, your chimney has airflow restriction — usually creosote buildup or a partial blockage. This is also a serious carbon monoxide risk.
If you notice a strong, smoky, or barbecue-like odor coming from your fireplace during humid summer months, that's creosote reacting with humidity. It needs to come out.
If wood that used to burn easily now requires constant tending, your draft is compromised. This usually means buildup is restricting airflow inside the flue.
Birds, squirrels, raccoons, and bats love empty chimneys. If you hear scratching or fluttering — or find debris in your firebox — you have an animal problem on top of needing a sweep.
If you can't remember your last sweep, it's been too long. The CSIA recommends annual inspection and sweeping whenever creosote reaches 1/8 inch.
You have no idea what the previous owner did or didn't do. Always get a Level II inspection and sweep before your first fire in a new-to-you home.
How We Work
Every sweep follows the same proven process — designed to leave your home spotless and your chimney safe.
Drop cloths over your hearth and surrounding floor. Plastic sheeting on furniture if needed. We treat your home like our own.
Industrial HEPA-filtered negative-pressure vacuum runs for the entire job, capturing 99.97% of soot particles before they enter your home.
We brush the entire flue from firebox to cap using brushes sized to your specific chimney dimensions. Smoke chamber and damper area get extra attention.
While we have access, we visually inspect everything — flue tiles, smoke chamber, damper, firebox, and exterior visible portions. Photos taken for any concerns.
All drop cloths removed, area vacuumed and wiped clean. Written report emailed to you within 24 hours, including any recommendations and photos.
Transparent Pricing
No hidden fees. No surprise charges. Free in-home estimate before any work begins.
Open masonry fireplace, single flue, average chimney height. Best for routine annual maintenance.
Full HD camera inspection of entire flue. Required for most home sales in St. Louis County.
Specialized service for gas log inserts and prefab fireplaces. Different process — no creosote, but plenty to inspect.
Pricing varies based on chimney height, condition, and access. Free written estimate before any work begins. No-obligation quote.
Honest Comparison
You can technically buy a chimney brush at Home Depot. Here's why most homeowners regret that decision.
Local Knowledge
Greater St. Louis chimneys have specific issues you won't find in other regions.
St. Louis winters bring repeated freeze-thaw cycles — the temperature crosses 32°F up to 80+ times per winter. This is brutal on chimney mortar and tile liners. Water seeps into tiny cracks during the day, freezes overnight, expands, and widens those cracks. By spring, what was hairline damage is often serious. Annual sweeping with inspection catches this damage early.
The 2025 North County storms damaged hundreds of chimneys across Florissant, Hazelwood, and surrounding areas. Many homeowners haven't yet had post-storm inspections — and storm damage often hides until next winter when leaks become visible. If your chimney was hit, get it inspected before next burn season.
Brick and stone chimneys in Chesterfield, Town and Country, Ladue, and Frontenac need extra care. We use color-matched mortar and historically-appropriate techniques on Tudor and Colonial homes. Premium masonry deserves premium service.
Most homes in Wentzville, O'Fallon, and St. Peters have factory-built (prefab) fireplaces with metal flues — different from masonry chimneys. They need different brushes, different inspection points, and specialized service. We're trained on both.
Homes near the Missouri River — particularly along Florissant's Sunset Park area, parts of St. Charles, and lower-elevation Wentzville — have noticeably higher year-round humidity. This accelerates creosote bonding to flue walls and increases the importance of annual cleaning.
Coverage Map
Click any city for area-specific information about chimney service in your neighborhood.
Other Services
Got Questions?
Everything St. Louis homeowners ask before booking their first sweep with us.
Our standard chimney sweep starts at $179 for an open masonry fireplace with a single flue and average chimney height. The price includes a free Level I visual inspection.
For homes that need a Level II HD camera inspection (required for most real estate transactions), the bundled rate is $329. Gas fireplace service starts at $199.
Final pricing depends on chimney height, condition, accessibility, and any additional services needed. We always provide a written estimate before any work begins — no surprises.
The CSIA recommends an inspection every year and a sweep whenever creosote reaches 1/8 inch in thickness.
For most St. Louis wood-burning households, that means an annual sweep. For occasional users, every 2 years may be sufficient — but you still need the annual inspection to know.
Gas fireplaces typically need professional service every 1-2 years, even though they don't produce creosote.
A complete sweep includes:
Mechanical cleaning of the entire flue, smoke chamber, smoke shelf, and damper area using flue-sized brushes.
HEPA-filtered vacuum protection running the entire job to capture soot before it enters your home.
Free Level I visual inspection with photo documentation of any concerns.
Damper operation test and lubrication if needed.
Complete cleanup — drop cloths, vacuum, and area wipe-down.
Written report emailed within 24 hours.
No — and we guarantee it. We use professional HEPA-filtered negative-pressure vacuums, drop cloths, and protective sheeting. Our process is specifically designed to leave your home cleaner than we found it.
"Cheap" $99 sweeps cut corners on equipment — that's where mess comes from. We don't.
Yes — and here's why this is one of the most dangerous misconceptions in chimney care.
Even unused chimneys accumulate animal nests, leaves, debris, and water damage. Birds and squirrels love empty chimneys with no caps. Crown deterioration happens whether you use the fireplace or not.
Many home insurance policies require annual inspection regardless of use. And when you eventually do light a fire, you want to know it's safe.
For a standard masonry fireplace in good condition: 60-90 minutes, including setup, cleaning, inspection, and cleanup.
If we add a Level II camera inspection, plan on 90-120 minutes. Heavy creosote buildup or unique chimney configurations may take longer — we never rush a job.
Level I: Visual inspection of accessible parts. Included free with every sweep. Suitable when nothing has changed since the last inspection.
Level II: Full HD camera scan of the entire flue interior. Required for home sales, after a chimney fire, or when changes are made to the appliance. $199 standalone, $329 bundled with sweep.
Level III: Includes removing parts of the chimney for direct access. Used when serious structural damage is suspected. Quoted case-by-case.
Yes. AIO Pro Chimney is a member of both the Chimney Safety Institute of America (CSIA) and the National Chimney Sweep Guild (NCSG) — the two leading professional organizations in the industry.
Our founder Refael has completed CSIA training and is currently awaiting the formal certification credential. Our work meets CSIA standards regardless.
We serve all of Greater St. Louis — both St. Louis County and St. Charles County. That includes:
North: Florissant, Hazelwood, Maryland Heights, St. Charles, St. Peters, O'Fallon, Wentzville
West: Chesterfield, Ballwin, Wildwood, Manchester, Town and Country, Frontenac, Ladue
Central: Clayton, University City, Webster Groves, Kirkwood
South: Fenton, Arnold
If your city isn't listed but you're in Greater St. Louis — give us a call. We probably serve you.
