Remove Stains From Brick
Look up at your chimney. If you notice a white crystalline substance on the face of the bricks, you’re seeing a chemical residue called efflorescence. Calcium carbonate, a soluble salt, is leached from the brick and mortar by moisture wicking out of the chimney.
If the chimney moisture isn’t affecting any other part of your house and you want an easy cosmetic fix, scrub off the white gunk with a wire brush, then take a garden hose and flush off both the bricks and the roof.
NOTE: There’s no easy way to stop this chemical reaction. Periodic cleanings may be necessary.
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