Chapter 01
Smoke enters the room
Smoke spillage can relate to blockage, flue temperature, house pressure, wind, appliance operation, fuel or chimney geometry. Open windows and exhaust fans can change building pressure, but a recurring symptom should not be dismissed as normal.
Stop use when smoke or combustion gases enter occupied space and arrange appropriate assessment. Make sure alarms are installed and maintained according to their manufacturer instructions.
- Note when smoke appears
- Record weather and fan use
- Do not improvise flue alterations
- Ventilate and leave if conditions are unsafe
- Seek emergency help for immediate danger
Chapter 02
Tar-like or persistent odors
Odor may become more noticeable in warm, humid or negative-pressure conditions. Deposits, moisture, animal material and airflow can all contribute. Fragrance or sealant does not address the source.
Tell the contractor whether the odor is seasonal, weather-related or connected to fan operation. Ask them to distinguish cleaning needs from moisture or pressure problems.
- Describe the odor
- Record season and weather
- Check whether fans intensify it
- Note visible residue
- Keep the appliance unused if safety is uncertain
Chapter 03
Water staining and masonry change
White deposits, rust, dark staining, peeling finishes and softened mortar are evidence of moisture movement, but not a complete diagnosis. Water may enter from the cap, crown, masonry, flashing, roof or condensation within the flue.
Photograph changes over time and after weather events. A repair scope should explain the likely path and the sequence for correcting it.
- Photograph interior and exterior signs
- Note rainfall and wind direction
- Identify past sealants or repairs
- Ask for all likely entry paths
- Avoid trapping moisture with unsuitable coatings
Chapter 04
Cracks, movement and falling material
Loose brick, leaning, widening cracks or falling masonry can create immediate hazards. Keep people away from the affected area and obtain professional advice. Interior flakes may also indicate liner or masonry deterioration and need identification.
Do not use an appliance when the venting path may be compromised. Cosmetic patching before diagnosis can hide movement and make later assessment harder.
- Restrict access below loose material
- Stop appliance use when the flue may be affected
- Record crack width and change
- Do not climb the stack
- Request structural or specialist input when advised
Takeaway checklist
- Treat alarms and fire events as urgent
- Stop use when safe venting is uncertain
- Record the symptom pattern
- Take safe ground-level photos
- Share past reports
- Ask for written findings
- Separate diagnosis from optional upgrades