What is the White Powder on Basement Walls?

Wednesday, March 29th, 2017 by Ben Bates

efflorescence in BasementsDo you see a white chaulky powder substance on your basement concrete or block walls or floors?

This is known as efflorescence.

Efflorescence is the result of minerals dissolving as water evaporates on porous material such as your basement’s concrete or block walls and/or floors.

The deposits are not harmful to your health, but efflorescence indicates water penetration in your home.

How can water enter your home?

Water can enter your home at any point where there is an opening in the foundation. This may include around pipes, cracks in the walls or floors.

  • Check the area near and above the efflorescence for leaks from pipes, windows or drains.
  • Inspect the exterior of your home for low areas where water may pool
  • Ensure that downspouts are draining several feet away from the home’s perimeter

If you do not discover an apparent cause of the efflorescence, or if you’re uncertain if the staining is mould or efflorescence, please contact us for a free inspection to help determine the cause and offer you a permanent solution to your leaky basement.


About the author

Ben Bates

Ben Bates lives in the Chatham-Kent area and has been involved in the basement, crawl space and foundation industry since 2008. He has a passion for improving homes the right way and knows what it takes to waterproof, encapsulate or stabilize homes in Ontario. He assists with over 900 projects per year.

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23576 Prince Albert Road
Chatham, ON N7M 5J7

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London, On N6L 1A4
Coverage Area: Southwestern Ontario