A roof biocide treatment targets moss, lichen and algae and may continue working after application. Unlike a dramatic same day pressure clean, the visible result can develop progressively as weather removes treated growth.
Whether it is suitable depends on roof material, condition, pitch, access and nearby rainwater systems. Colorbond, terracotta and concrete tile do not share one universal cleaning process.
A professional assessment should also account for runoff, water tanks, gutters, gardens and manufacturer guidance. Customers should receive realistic expectations about the treatment timeline.