Monthly Archives: April 2019

What causes these stains on the chimney?

Comment this story Comment Q: Our fireplace is badly stained from the weather. A chimney sweep told us that chemicals and high-pressure washing won’t guarantee the removal of these stains, and that high-pressure washing might even damage the brick. How can we safely remove stains? A: The stains could be mold, dirt, algae or soot, […]