Efflorescence
White, chalky mineral deposits on concrete walls and floors. Here's what causes it and how we fix it.
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Signs to Watch For
- White, chalky mineral deposits on concrete walls and floors.
- Damp or stained drywall, flooring or storage boxes
- Musty odour or noticeably higher humidity
- Problems that worsen after rain or spring melt
What Causes It
Most basement moisture comes from groundwater and surface water building up against the foundation, humid air meeting cool concrete, or drainage that can't keep up. In Calgary, clay soils that hold water and rapid freeze-thaw cycles make these issues common.
Why Not Wait?
Moisture rarely fixes itself. Left alone, it can damage finishes, stored belongings and indoor air quality — and repairs get more costly over time.
Book Your Free Inspection
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Recommended Solutions
Wall Membranes & Drainage Matting
Dimpled membranes on basement walls guide seepage and condensation down into the drainage system instead of onto your floor.
Learn more →Interior Drainage Systems
A perforated channel installed beside the footing collects water that seeps through walls or the floor-wall joint and directs it to a sump.
Learn more →Downspout Extensions & Exterior Water Management
Simple exterior fixes — downspout routing and lot grading advice — to reduce how much water reaches your basement walls.
Learn more →