Seattle receives an average of 37 inches of rain annually, with most of it falling between October and May. That prolonged wet season creates sustained moisture loading on building envelopes. When gutters clog with fir needles and alder leaves, water overflows and runs down siding. When wind-driven rain hits west-facing walls, it finds every gap in caulking and flashing. When relative humidity inside your home stays above 60 percent for weeks at a time, moisture vapor condenses on cold wall surfaces. This combination of exterior water intrusion and interior condensation creates the bubbling paint, blistering wall paint, and lifting wallpaper you see in almost every Seattle home over 20 years old.
Seattle's building codes have evolved significantly over the past three decades to address moisture management. Homes built after 1990 require continuous air barriers and improved flashing details. Homes built after 2000 require enhanced ventilation systems. But older homes lack these protections. Evergreen Water Damage Restoration Seattle understands how buildings of every era perform in this climate. We know which construction details fail first and how to retrofit older homes with modern moisture control strategies. When you hire a local company that works exclusively in this region, you get solutions designed for your specific weather patterns and building stock, not generic approaches that work in Phoenix but fail in Seattle.