Nelson, Kaslo Office
phone (250) 352-2300
fax (250) 352-2309
Bill Lynch:
cell (250) 354-8682
bill@lynchinspection.com

Castlegar, Grand Forks
phone (250) 359 8044
fax (250) 359 8045
Paul Muntak:
cell (250) 365 9865
paul@lynchinspection.com

Salmo, Creston Office
phone (250) 357-2661
fax (250) 357-2662
Dale Olinyk:
cell (250) 354-8761
dale@lynchinspection.com
1-877-352-2300
Chalky, white powder on concrete: efflorescence

  There are patches of chalky, white powder along my concrete basement walls. What causes this? Is it dangerous or harmless?
 

This harmless, white powdery substance is the salty byproduct of a chemical reaction between water and the ingredients in your concrete walls. The technical name for this powder is efflorescence. It indicates that there is seasonal dampness affecting your foundation walls. Efflorescence is a sign that you should be taking measures to control the surface water outside your foundation walls.   


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This article was written by Lynch Building Inspection Services Ltd. of Nelson, British Columbia. It originally appeared in The Nelson Express.

Lynch Building Inspection Service offers residential, commercial, institutional building and construction inspection.

Our territory encompasses the Kootenay/ Boundary Region of BC, and includes Ainsworth, Balfour, Burton, Castlegar, Creston, Christina Lake, Fauquier, Fruitvale, Grand Forks, Greenwood, Midway, Montrose, Nakusp, Nelson, New Denver, Procter, Rossland, Slocan Park, Salmo, Slocan, Kaslo, Silverton, South Slocan, Trail, Warfield, Winlaw, Wynndel, and Ymir.




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