Moss, Algae, and the Damage You Cannot See From the Driveway
Moss and algae growth on a north-facing Salmon Creek roof is a structural problem, not a cosmetic one. The combination of shade and moisture makes roofs ideal for moss and algae growth, which can lead to shingles lifting and leaks. Moss lifts shingle granules, holds moisture against the wood deck, and accelerates rot under the felt. By the time you see green from the street, the underlayment is already compromised in patches.














