8 Signs You Need New Siding on Your Seattle Home

Sign 1: Visible Cracks, Splits, or Rot The most obvious sign. Cracks allow water into the substrate. Rot means water has already been in there long enough to cause structural damage. Inspect at board ends and bottom rails — these fail first. Sign 2: Peeling Paint That Keeps Coming Back If you repaint and it peels again within 1–2 years, moisture is coming from inside the wall, not outside. The siding itself has failed as a moisture barrier. Painting over failing siding is expensive and temporary. Sign 3: Higher Energy Bills Siding that has lost its integrity lets conditioned air escape. If your heating or cooling bills have increased without other explanation, check your siding and the insulation behind it. Sign 4: Mold or Mildew Inside Your Home Interior mold on walls adjacent to exterior — especially in upstairs bedrooms and exterior corners — is a sign that moisture is getting through your siding. This is the most serious sign; it means damage is already occurring inside the wall cavity. Sign 5: Loose, Warped, or Buckling Panels Siding that has pulled away from the wall, buckled, or is visibly warped has lost its weather-sealing ability. Wind-driven rain can get behind these sections easily. Sign 6: Soft Spots When You Press the Siding Press firmly with your thumb anywhere on your siding. It should feel hard and solid. If it gives, flexes, or feels spongy, there's rot in the substrate behind it — even if the surface looks OK. Sign 7: Faded or Chalky Appearance Severe fading means UV has broken down the paint film. Chalking (white powder on your hand when you touch the siding) means the same. At this point the siding is no longer weather-protected even if it's not cracked. Sign 8: Siding Older Than 20–30 Years Most siding types have a 20–30 year functional lifespan in Seattle's climate. If you don't know when your siding was installed and the home is 25+ years old, assume it's due for assessment.

Deferred siding replacement is one of the most expensive mistakes Seattle homeowners make. What failing siding allows: • Water penetrates behind siding into the sheathing (OSB or plywood) • Wet sheathing rots over months/years — costs $2,000–$8,000 per section to replace • Moisture reaches framing — structural repair adds $5,000–$25,000+ • Mold develops in wall cavity — remediation can cost $5,000–$30,000 • Insulation is saturated and loses R-value — higher ongoing energy costs A $30,000 full siding replacement that you defer becomes a $50,000–$80,000 siding + structural + mold project if you wait until the damage is significant. Schedule a free inspection the moment you see two or more warning signs.