How Often Should You Repaint Your Home's Exterior in Seattle?

Seattle's climate creates specific challenges for exterior paint that don't exist in drier climates: Moisture: 37+ inches of rain per year means exterior surfaces are wet more than they're dry. This is the primary enemy of film-forming paint — it causes blistering and peeling. Limited UV: Seattle's cloudy winters and cool summers mean paint doesn't dry and cure as aggressively as it does in Phoenix or Atlanta. Less UV cure can leave paint slightly more vulnerable to moisture. Temperature swings: Seattle's freeze-thaw cycles aren't extreme, but they do occur. Paint that hasn't fully penetrated the substrate can crack and peel at these seams. Biological growth: Mold, mildew, and algae grow readily in Seattle's humidity. Once they penetrate behind paint, the paint fails — which is why mildew-resistant paint additives matter here. The solution: proper prep, primer, and premium 100% acrylic paint (Sherwin-Williams Duration or Emerald).

You don't have to wait for peeling to schedule a repaint. These warning signs mean your paint's protection is failing: Visible peeling or flaking: Active paint failure — schedule immediately to prevent moisture damage to the substrate. Chalking: Run your hand across painted siding and it comes away with white powder. This is UV degradation — the paint has lost its protective properties. Fading: Significant color change from original. Beyond aesthetics, faded paint indicates UV degradation throughout the film. Cracking or alligatoring: Network of cracks in the paint surface — the paint has lost elasticity and moisture is penetrating. Mold or mildew growth: Dark staining that won't wash off indicates biological growth behind the paint film. Caulk failure: Gaps at window and door trim, siding joints, corners. Water is entering the substrate regardless of how the rest of the paint looks. If you see any two of these signs: schedule your repaint this year.

Best practices for maximizing exterior paint life in Seattle's climate: 1. Premium paint only: Sherwin-Williams Duration or Emerald. The extra $20–$30 per gallon pays for itself many times over in lifespan extension. 2. Full surface prep: Power wash, scrape all loose paint, sand rough areas, caulk all gaps, prime bare wood. 80% of paint longevity is in the prep. 3. Two coats minimum: One coat over old paint won't last as long as two properly applied coats. 4. Paint in summer: July–September is the best painting weather in Seattle. Avoid painting when rain is forecast within 48 hours or when temperatures drop below 50°F. 5. Maintain caulk: Inspect caulk lines annually and re-caulk any gaps before water gets behind the paint. Call [PHONE] for a free paint assessment and estimate.