For relentless PNW rain, choose algae-resistant asphalt shingles with SBS-modified asphalt, enhanced seal strips

https://telegra.ph/Seattles-2026-Building-Codes-What-Homeowners-Must-Know-Before-a-Roof-Replacement-Seattles-2026-Building-Codes-What-Homeowners-Mu-06-03

For relentless PNW rain, choose algae-resistant asphalt shingles with SBS-modified asphalt, enhanced seal strips, and high wind ratings. Pair with waterproof underlayment and metal flashing to keep edges and valleys leak-free.