[cdelb]

In coastal regions of the PNW it is not uncommon to see moss and algae growth start within 3 years of a roof being installed. Replacement can be necessary within 10 years if the problem isn't dealt with.

source - owned a roof cleaning company.

[ghaff]

Though I would presume roofs where moss and algae are a problem if not dealt with aren't great candidates for solar.

[jaggederest]

Yep. That's where I am. Currently getting a HELOC for when the inevitable happens, planning on getting a metal roof instead of this asphalt claptrap. Figure it'll cost 3x as much but last 5x as long.