What's on a wood stove maintenance checklist?
Updated August 2026
The job that matters most on a wood stove is sweeping the flue, done once a year or every cord or two of wood, because creosote past 1/8 inch is what starts chimney fires. Around that, inspect the door gasket, the glass, and the catalytic combustor, and burn only seasoned wood under 20% moisture so you make less creosote to begin with. A CSIA-certified sweep runs $150–400.
| Task | Interval | Effort |
|---|---|---|
| Burn only seasoned wood under 20% moisture | Each fire | ongoing · DIY |
| Empty ashes into a metal can, never a bucket indoors | As needed | 5 min · DIY |
| Task | Interval | Effort |
|---|---|---|
| Check the flue for creosote buildup | Monthly | 5 min · DIY |
| Inspect the door gasket seal and glass | Monthly | 3 min · DIY |
| Task | Interval | Effort |
|---|---|---|
| Have the chimney swept and inspected | Yearly or per cord | $150–400 pro |
| Replace a worn door gasket | As needed | $20–40 DIY |
| Task | Interval | Effort |
|---|---|---|
| Inspect or replace the catalytic combustor | Every 5–7 years | $100–200 part |
What neglect costs
Creosote is the one that hurts you: it coats the flue with every smoky, low fire, and once the layer passes about 1/8 inch it can ignite into a chimney fire that reaches over 2,000°F and cracks the liner or spreads to the house. A leaking door gasket makes the stove overfire and burn wood too fast. A spent catalytic combustor quietly cuts efficiency and heat output. The $150–400 yearly sweep is cheap insurance against a fire that can total a chimney, a $3,000–8,000 rebuild.
Leave these to a pro
Hire a CSIA-certified chimney sweep once a year ($150–400) for both the cleaning and a level-1 inspection of the flue, liner, and cap; they catch cracks and blockages you cannot see from below. Heavy burners may need a second sweep mid-season. Splitting and seasoning wood, running a moisture meter, and swapping a door gasket are all DIY; the flue, liner, and any structural or catalytic work stay with the sweep. If the stove backs up central heat, fold the sweep date into your HVAC checklist, and keep a smoke and CO alarm nearby.
This whole checklist ships as reminders in OnOtto: every task above, on the right schedule for your home, snooze-proof.
Load this checklist as remindersFrequently asked questions
How often should a wood stove chimney be swept?
At least once a year, and more if you burn a lot: a common rule is every cord or two of wood, or whenever the creosote layer reaches about 1/8 inch. Check it monthly during the season by looking up the flue with a light. Burning wet or unseasoned wood and running slow, smoldering fires builds creosote fastest, so heavy or damp-wood burners often need a mid-season sweep.
How can I tell if firewood is dry enough?
Aim for wood under 20% moisture, which usually means splitting green wood and letting it season 6 to 12 months, longer for oak. A cheap moisture meter reads it directly on a fresh split face. Other signs of seasoned wood: checks or cracks in the end grain, a hollow knock when two pieces are struck together, and a gray, dull color rather than fresh green. Wet wood wastes heat and coats your flue.
What is the catalytic combustor and does it need replacing?
On catalytic stoves it is a honeycomb element that reburns smoke at a lower temperature, boosting efficiency and cutting both emissions and creosote. It degrades over time and typically lasts about 5 to 7 years, or 10,000 to 12,000 hours, before it needs replacing (roughly $100 to $200 for the element). Signs it is failing include weaker heat, more smoke, and more creosote. Non-catalytic stoves skip this part entirely.