Moss, Algae, and the Damage You Cannot See From the Driveway
Moss on a north-facing Orchards roof is a structural problem, not a cosmetic one. Moss lifts shingle granules, holds moisture against the wood deck, and accelerates rot under the felt. Algae growth and persistent moisture, common in the damp Pacific Northwest climate, can also degrade a roof even when there is no visible interior damage, making regular inspections essential to catch problems early. By the time you see green from the street, the underlayment is already compromised in patches.














