Chimney and flue condition
Critical itemChimney must be structurally sound with intact flue liner. Damper must operate. Cap and spark arrestor required. Annual cleaning recommended.
Standard
Chimney must be structurally sound with intact flue liner. Damper must operate. Cap and spark arrestor required. Annual cleaning recommended.
How to check
1. Inspect chimney exterior — look for cracked or missing mortar, leaning, damaged cap
2. Check chimney cap — should have a cap with spark arrestor screen
3. Open and close damper — should move freely and seal when closed
4. Look up the flue with a flashlight — should be clean, no creosote buildup
5. Check for creosote buildup — more than 1/8" layer requires cleaning
6. Verify flue liner is intact (no cracks, gaps, or missing sections)
7. Check hearth extension — minimum 16" in front, 8" to each side
8. Verify combustible materials are at least 6" from the fireplace opening
9. Check for flashing at chimney-to-roof junction
Common problems
- Cracked flue liner (carbon monoxide can enter living space — DEADLY)
- Heavy creosote buildup (chimney fire risk)
- Missing chimney cap (rain, animals, and debris enter)
- Damper stuck or missing (energy loss when not using fireplace)
- Damaged chimney masonry (structural failure risk)
- Combustibles too close to fireplace opening
- Missing or damaged flashing (roof leaks at chimney)