
Experts
How Long Does a Roof Last in the Pacific Northwest? King County Homeowner’s Guide
Manufacturers say 30 years. Pacific Northwest weather says less. Real King County roof lifespan by material (3-tab 15-18yrs, architectural 22-28, metal 40-70, cedar 25-30 treated), the 5 climate factors that cut years off, signs of end-of-life, and what extends or doesn’t extend the roof you have.