Posted on Sep 23, 2020

D&M Home Inspections

On a chimney without the rain hat or spark arrestor, water can collect between the flue liner and the bricks.

This leakage shows up as efflorescence (mineral salts), the same thing you sometimes see on the interior of basement foundations. The efflorescence is an indication that something is wrong, and a more thorough evaluation of the chimney is needed.
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