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Common Water Issue in BC
Visible Mould Growth
Mould on walls, ceilings, baseboards, or in closets is a clear indicator of a moisture problem that requires investigation. Mould needs moisture, warmth, and a food source (wood, drywall, dust) to grow. In BC homes, the most common mould locations are bathrooms, basements, around windows, and behind furniture against exterior walls.
Possible Causes
- •Chronic high humidity from inadequate ventilation
- •Hidden plumbing leak providing constant moisture
- •Building envelope leak allowing water into wall assembly
- •Condensation on cold surfaces from thermal bridging
- •Past flooding that was not fully dried before rebuilding
Recommended Steps
- 1Do not disturb visible mould — disturbing it releases spores into the air
- 2Small patches (under 3 sq ft) can be cleaned with detergent by a homeowner wearing PPE
- 3Identify and fix the moisture source — mould will return if moisture persists
- 4Call for a moisture inspection to identify hidden moisture sources before mould remediation
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