By the Miles Chimney Sweep team · Updated August 2026
It's the question we hear on almost every first call: “How often does a chimney actually need to be swept?” The honest answer is simpler than most companies make it sound — and skipping it is the single most common cause of the chimney fires we get called out to inspect afterward.
The Short Answer: Once a Year, Every Year
The National Fire Protection Association (NFPA Standard 211) recommends that chimneys, fireplaces and vents be inspected at least once a year, and cleaned whenever creosote has built up. For a fireplace that gets regular winter use, that works out to a sweep every year — ideally in late summer or fall, before the burning season starts.
Burn More? Sweep More.
Once a year is the floor, not the ceiling. You should move to twice a year if any of these sound like your home:
- You burn wood as a primary heat source (most evenings all winter)
- You burn softwoods like pine, which creosote faster than seasoned hardwood
- You notice smoke entering the room, or a strong smell even when there's no fire
- Your fireplace damper or glass turns black quickly after cleaning
What If You Barely Use the Fireplace?
Even a fireplace that burned a handful of fires last year needs its annual inspection. Chimneys fail for reasons that have nothing to do with soot: birds and squirrels nest in uncapped flues, mortar joints crack and let water in, and caps rust through. Ten minutes of inspection catches problems while they're a $200 fix instead of a $3,000 rebuild.
The Warning Signs You're Overdue
- Campfire smell in the room, especially on humid days or when the AC runs
- Smoke rolling back into the room instead of drafting up
- Black, flaky deposits you can see (or scrape) just above the damper
- Oily marks on the fireplace surround, or debris dropping into the firebox
- It's been more than 12 months — the calendar is a warning sign by itself
What a Professional Sweep Actually Includes
A proper sweep isn't just a brush up the flue. A professional visit is a bottom-up sweep for full airflow, plus a safety check of the firebox, damper, smoke chamber, flue liner, crown and cap — with photos of anything we find, so you can see exactly what we see. No pressure, no surprise add-ons: we show you, you decide.
The Best Time to Book? Before the Rush.
Chimney companies everywhere book out fast from October through January. Schedule your chimney sweep in late summer or early fall and you'll get your pick of appointment windows — and walk into burning season knowing your chimney is clean, capped and safe. Not sure what your chimney needs? Start with a chimney inspection or request a quote below.