A cracked chimney crown
Keep any existing contractor photos and note indoor moisture or fallen fragments. Do not climb up to measure a crack.
Observe → document → ask
These guides help you describe a problem and request the right investigation. They do not diagnose a chimney remotely.
For active fire, a carbon-monoxide alarm or immediate danger, leave the building and contact emergency services.
Keep any existing contractor photos and note indoor moisture or fallen fragments. Do not climb up to measure a crack.
Photograph the chimney from the ground if the top is visible. Note fallen metal or newly visible debris without approaching unstable materials.
Record changes you already noticed during operation and any building or appliance modifications. Do not reproduce the problem with another fire.
Take a photograph of accessible visible material without disturbing it. Identify the fuel and appliance for the professional.
Record whether smoke appears during lighting, steady burning or refueling, and whether exhaust fans were running. Do not repeatedly light fires to recreate the symptom.
Photograph the first visible wet area and note rainfall, wind direction and whether the appliance was operating. Keep the roof inspection for a professional.
Note when the smell occurs, whether the weather is damp and whether fans or heating equipment are operating. Carbon monoxide has no smell: odor cannot rule it in or out.
Take photos from the ground and record where fragments collect. Keep people away from falling debris.
Note noises, visible nesting material or fallen debris from a safe location. Do not reach into the flue or attempt to smoke animals out.
Only after emergency responders say it is safe, retain incident information and photographs taken without entering unsafe areas.