Properties near the water in Palisades, Lakewood, and South Shore deal with constant humidity, while homes tucked into the hills under towering Douglas firs stay damp in the shade. To prevent blistering and moss damage, we never paint over damp wood. We thoroughly wash the exterior, scrape and sand loose coatings, seal every gap with flexible caulking, and apply moisture-resistant primers and paints formulated specifically for the Pacific Northwest climate.