About This Service
Chimney odors have specific causes: creosote smells like campfire-turned-sour and intensifies in summer humidity and rain; animal odors are unmistakably organic; damp masonry smells musty. Effective odor removal identifies which one you have and eliminates the source — not just the smell.
The usual sequence: thorough sweeping to strip creosote, removal of any organic debris, treatment of remaining odor compounds, and then the crucial part — fixing why the smell entered the room. Negative house pressure pulls flue air inside, so damper sealing and draft correction are often the real cure.
Signs You Need Chimney Odor Removal
- Campfire smell indoors on rainy or humid days
- Odor that worsens when A/C or exhaust fans run
- A musty or organic smell from the firebox
- Smells that returned after a basic sweeping

How Removal Works
We identify the species first — it determines the legal and humane approach.
Removal or (for protected swifts) scheduling around fledging.
All nesting material and debris cleared; the flue swept if needed.
Exclusion hardware installed so this is the last time.
Why It Matters for Safety
Nesting material is dry tinder stacked inside a fire conduit, animal blockages push combustion gases back into living space, and wildlife in a flue can carry parasites and disease. Humane removal plus exclusion resolves the hazard without harming the animals.
Maintenance Tips From Our Technicians
- Keep caps screened on every flue — exclusion beats eviction, always.
- Trim branches that overhang the chimney; they're wildlife on-ramps.
- Spring scratching sounds mean act fast, before nesting is established.
- After any animal event, sweep before burning; nests are tinder.
Why Homeowners Choose Donovan Chimney & Fireplace
What makes Donovan Chimney & Fireplace different is boring and rare: we show up when scheduled, we explain findings in plain language with photos, and our pricing is set before the work starts. Twenty-five-plus years on the Front Range, fully licensed and insured, open around the clock.
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Frequently Asked Questions
Why does my chimney smell worse in summer?
Humidity activates creosote's odor compounds, and summer stack effect often reverses flue airflow — pushing that air down into the house instead of up and out. It's the classic Colorado pattern: silent all winter, smelly every July thunderstorm.
Will a chimney sweep alone fix the smell?
It removes the main source, which helps substantially — but glaze residue and reversed airflow can keep a faint odor alive. Complete treatment pairs the sweep with odor neutralization and airflow correction; we scope what your situation actually needs.
How soon can you come out?
Routine appointments are usually available within the week, and our 24/7 emergency line handles the situations that can't wait. October and November book fastest — spring and summer scheduling is easiest.
Request a Free Estimate
We're open 24/7. Fill this out and we'll get right back to you — or call 720-310-3798.
Book Chimney Odor Removal Today
We serve Denver, Fort Collins, Colorado Springs, and every community around them — see the full service area list.
Emergencies don't keep business hours and neither do we: our phone answers 24 hours a day, 7 days a week.
