
Chimney Cleaning & Sweeping
Removing soot and creosote so a flue can vent the way it was designed to.
Learn about Chimney CleaningSt. Louis metro · MO
When a fireplace in O'Fallon starts smoking, leaking, or simply will not light, the fix depends on finding the real cause first. Mister Chimney covers O'Fallon and the wider St. Louis region with cleaning, inspection, repair, and installation, and we scope the work to what we find rather than a standard package.
Many O'Fallon calls come down to a fireplace that smokes, a chimney that leaks, or a system that has not been serviced in a while. In each case the useful first step is the same, an assessment that finds the cause, so the fix addresses the problem instead of the symptom.
Missouri's swing between humid summers and freezing winters is hard on chimneys in O'Fallon. Masonry absorbs water through the warmer months, then that water freezes and expands when the cold sets in, and the repeated cycle is what loosens mortar, spalls brick, and cracks crowns. That is why keeping rain out — a sound crown, a good cap, intact joints — matters as much here as the cleaning itself.
O'Fallon sits within the area we cover from St. Louis, MO, generally within about 65 miles of the primary city. We schedule Missouri work across this region and match each visit to the system in front of us.
Around O'Fallon, the common prompts to call include:
For O'Fallon appointments, we begin by assessing the chimney or fireplace on site, because that is the only reliable way to know what a system needs. We describe the conditions we can see and accessibly reach, and we are straightforward about anything that needs a closer look rather than overstating what we've observed.
Keeping a O'Fallon chimney in good shape is more about steady upkeep than dramatic repairs. Systems that get looked at each year — and cleaned when buildup calls for it — tend to avoid the leaks, blockages, and masonry decay that catch up with neglected ones. We'd rather help you stay ahead of those than fix them after the fact.
Below are the services we're asked about most in O'Fallon. Each links to a full description of what the work involves. Anywhere within roughly 65 miles of St. Louis, reach us at 314-798-9456 or send the form and we'll take it from there.

Removing soot and creosote so a flue can vent the way it was designed to.
Learn about Chimney Cleaning
A structured look at the flue, firebox, and exterior to document the system's condition.
Learn about Chimney Inspection
Diagnosing and correcting the specific problem, from a leak to failing masonry.
Learn about Chimney Repair
Rebuilding and restoring the brick and stone that make up the chimney structure.
Learn about Chimney Masonry
Fitting the flue cover that keeps rain, animals, and embers where they belong.
Learn about Chimney Cap Installation
Diagnosing why a gas fireplace won't light, stay lit, or run cleanly, and correcting it.
Learn about Gas Fireplace RepairTo schedule in O'Fallon, call 314-798-9456 or submit the form on this page with a few details about your system.
Questions
Yes. We service gas fireplaces and their venting as well as wood-burning systems in O'Fallon, including repair, log sets, and periodic maintenance.
Yes. A home purchase is a classic reason for a thorough inspection, typically a Level 2 with an interior flue scan, so you know the true condition before closing on a O'Fallon property.
Nearby
24/7 service
Call and we’ll talk through what your system needs.
Get in touch
Tell us about your chimney or fireplace and the best number to reach you. Full name, phone, and ZIP are required.