
Chimney Cleaning & Sweeping
Removing soot and creosote so a flue can vent the way it was designed to.
Learn about Chimney CleaningSt. Louis metro · IL
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.
The seasons around O'Fallon put a chimney through heat from the fires you burn and water from the weather that follows. Both take a toll over time, so the systems that hold up best are the ones that get looked at regularly rather than only when something goes obviously wrong.
Our St. Louis, MO service area includes O'Fallon and the communities around it, generally within a 65-mile radius of the main city. We work by appointment across Illinois and confirm the specifics of the job once we see the system.
A few practical signs tell you a O'Fallon chimney or fireplace is due for attention:
When we come out in O'Fallon, the first step is an on-site assessment. Two chimneys that look alike can need very different work, so we identify what your system actually is and what condition it is in, then talk through the choices. We don't quote a price or promise a fix for something we haven't seen in person.
Whether a O'Fallon home has a century-old masonry chimney or a newer factory-built system in a sided chase, the two are serviced differently, which is why we identify what a property actually has before recommending anything. Older brick stacks bring masonry and mortar work; prefab chases bring cap and chase-cover concerns. Either way, the goal is a system that vents cleanly and keeps water out.
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 RepairFor O'Fallon service, reach us at 314-798-9456, or use the form below and we will get back to you about your chimney or fireplace.
Questions
We are available around the clock to take your call and schedule. Timing depends on the work and the season, so reach us at 314-798-9456 and we will find a slot that fits.
No. We serve O'Fallon from our St. Louis, MO coverage area and come to your property for the work. There is no walk-in location in O'Fallon itself.
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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.