Alberta has a dry climate, so many people assume mould isn’t a big problem here. But after water damage, the inside of a wet wall or a soaked basement carpet doesn’t care what the weather is outside. Mould can start growing within 24 to 48 hours on wet drywall, wood and carpet backing in any Sherwood Park home. Here’s what to watch for and how proper drying prevents it.
How Mould Develops After Water Damage
| Time | What’s happening |
|---|---|
| 0–24 hours | Water wicks into drywall, underlay and baseboards; humidity rises. |
| 24–48 hours | Spores germinate on damp organic materials. |
| 3–10 days | Hidden growth inside wall cavities and under flooring; musty odour. |
| 2+ weeks | Visible spotting and material breakdown. |
Stop mould before it starts. Book professional drying.
Emergency water removal, drying & repairs across Sherwood Park and Strathcona County. Free phone assessment.
Sherwood Park Mould Risk Factors
Winter condensation
When it’s -25°C outside, warm, moist indoor air condenses on cold surfaces such as window frames, closet corners on exterior walls, and the underside of the roof deck. Repeated condensation can feed mould even without a leak.
Attic frost
Moisture escaping into the attic freezes on the roof deck and nails, then melts in a warm spell, soaking insulation and ceiling drywall. See ice dams and attic leaks.
Finished basements
Carpet and drywall in basements are the first to get wet in a flood and the slowest to dry naturally.
Slow, hidden leaks
Drips under sinks, behind dishwashers and around toilets can go unnoticed for weeks.
Signs of Mould
- Musty, earthy smell, especially in the basement
- Black, green or white spots on drywall, baseboards, window frames or the back of carpet
- Peeling or bubbling paint
- Stains on ceilings under the attic
- Allergy-like symptoms that ease when you leave the house
How Professional Drying Prevents Mould
- Fast extraction of standing water
- Moisture mapping with meters and thermal imaging to find hidden water
- Removal of materials that can’t be dried in time
- Antimicrobial treatment on exposed surfaces
- Structural drying with commercial dehumidifiers and air movers (timeline)
- Verification with meters before anything is closed up
When Mould Is Already There
Small surface spots on hard surfaces can often be cleaned with soap and water using gloves and a mask. Larger areas, mould inside walls or growth after a sewer backup should be handled professionally with containment, HEPA air filtration and removal of affected materials. Always fix the moisture source first, or it’ll come back.
Keep Your Home Mould-Free
- Keep winter indoor humidity moderate (often 30–40% in very cold weather) to limit condensation on windows.
- Run bathroom fans during showers and for 20 minutes after; make sure they vent outdoors.
- Check under sinks and around toilets monthly.
- Run a dehumidifier in the basement in summer if humidity climbs above 50–60%.
- Deal with any leak the same day.
Insurance usually covers mould from a sudden, promptly reported water loss, but not long-term leaks or humidity. See our insurance guide. Need help now? Call for water damage restoration in Sherwood Park.
Musty smell after a leak? Call for an assessment.
Emergency water removal, drying & repairs across Sherwood Park and Strathcona County. Free phone assessment.