0 Best Mold Assessment Pros in Mercer Island, WA (Verified 2026)

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Washington Mold Information

Climate Zone

Pacific Coastal

High in western regions (60-80% average)

Humidity Level

High in western regions (60-80% average)

Common Mold Types

Cladosporium, Penicillium, Aspergillus

Weather Considerations

Puget Sound region has persistent moisture year-round. Eastern Washington is much drier. Western homes need robust vapor barriers and dehumidification to combat marine climate.