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Over time, lichen and moss will grow on most outdoor surfaces – including your roof. Left unchecked, it damages the surface coating of your roof, creating ‘moisture traps’ that can cause corrosion. Using Gerard Roof Refresh will remove the growth and help prevent future problems
Prevent growth before it happens
Gerard Roof Refresh is a powerful cleaning agent that targets not only the lichen, moss, and algae but also the spores that lead to it. We recommend treating the roof every three to five years, or sooner if signs of growth are visible (this is also required to maintain the warranty on your roof). You can either spray the roof yourself or arrange a commercial contractor who specializes in this type of work.