The Lower Mainland is wet, so indoor humidity problems here are usually about moisture that cannot get out rather than moisture getting in. Daily living adds a surprising amount, showers, cooking, laundry, and drying firewood, and a well-sealed modern home has no natural leak path to release it. The result is condensation on windows, musty smells, and mould in the coldest corners.
Where is the moisture coming from?
Start with the sources you control before buying equipment. A family of four adds several litres of moisture to the air every day just by living.
- Bathroom fans that are undersized, unducted, or vent into the attic
- Range hoods that recirculate instead of venting outside
- Unvented crawlspaces with exposed soil
- Clothes dryers with disconnected or crushed vent lines
- Firewood stored indoors to dry
What actually fixes it here?
Ventilation beats dehumidification in our climate for whole-home problems. An HRV exchanges stale humid indoor air for drier outdoor air while recovering most of the heat, which is why they are standard in newer BC construction.
A dehumidifier is the right tool for one damp basement. It is the wrong tool for a whole house, because it treats the symptom and adds heat and electricity cost.
Why does it matter beyond comfort?
Sustained humidity above roughly sixty percent supports mould and dust mites, and moisture in wall assemblies causes damage that costs far more than the ventilation would have.
We install and service ventilation systems across the Fraser Valley and fabricate the ducting for them in house, so the fan you buy is actually vented the way it was rated to be.
Book a Humidity Assessment
We find the moisture source before recommending equipment.