Fig. 21: Leaning chimney Fig. 22: Chimney crown damage Fig/ 23: Loose bricks and/or mortar
Fig. 24: White powder Fig. 25: Moisture on exterior walls of chimney
National Oilheat Research Alliance 23
Fig. 26: Moisture or stains on
interior walls near chimney
Fig. 27: Visual evidence of damage Fig. 28: Debris in the clean-out
Fig. 29: Misaligned terra-cotta tiles at the joints Fig. 30: No liner installed