Roof Replacement & Repair in Mercer Island, WA

Your roof takes a beating on Mercer Island. Between the constant drizzle from October through May, occasional windstorms off Lake Washington, and moss growth that thrives in our Pacific Northwest climate, roofs here need more attention than in drier parts of the country. Whether you're in the East Seattle neighborhood near the I-90 bridge or up in the wooded areas of First Hill, protecting your home starts at the top.

When Mercer Island Roofs Need Attention

Many homes on the island were built in the 1960s and 70s, and if your roof hasn't been replaced in the last 20-25 years, it's worth a professional inspection. Composite shingle roofs—the most common type here—typically last 20-30 years in our wet climate, but heavy moss, clogged gutters, and tree debris can shorten that lifespan.

Warning signs include curling or missing shingles, granules collecting in your gutters, water stains on interior ceilings, or visible daylight through roof boards in your attic. Even small leaks can lead to rot in the sheathing and framing, especially given how much moisture we get year-round.

Roof Repair vs. Full Replacement

Not every issue requires tearing off your entire roof. Isolated damage from a fallen branch, a few missing shingles after a windstorm, or flashing problems around chimneys and skylights can often be repaired affordably. A quality contractor will give you an honest assessment rather than automatically pushing for a full tear-off.

That said, if your roof is approaching the end of its service life or has widespread moss damage, patching may only buy you a year or two. In those cases, a complete replacement with modern materials—ideally algae-resistant shingles rated for our climate—is the smarter investment.

Mercer Island requires building permits for roof replacements, and your contractor should handle that process through the city's development services. Make sure any roofing work includes proper ventilation and underlayment designed for Washington's wet conditions, not just the bare minimum. Your home deserves a roof built to last in this environment.