Why chimney sweeping matters
Every fire leaves creosote behind, a tar-like residue that coats the inside of your flue. It is highly flammable, and it builds up faster with unseasoned wood, low-burning fires, or a cold exterior chimney.
The Chimney Safety Institute of America (CSIA) recommends sweeping once creosote reaches about 1/8 inch. For most homes that burn wood regularly, that means at least once a year, ideally before the burning season.
Signs you’re due for a sweep
- A campfire or smoky smell in the house, especially in humid weather
- Black, flaky, or shiny tar-like deposits in the firebox or on the damper
- Fires that are hard to start or smoke that drifts into the room
- It has been more than a year since the last cleaning
- Animals or nesting debris in or around the chimney
What a quality sweep includes
- Drop cloths and HEPA vacuums to keep your home clean
- Brushing the full flue, smoke chamber, smoke shelf, and firebox
- A Level 1 visual inspection of accessible components
- Photos or notes on anything that needs attention
- Clear recommendations with no pressure to buy