If you find that dirt and grime has accumulated on your roof, you need to wash it off. However, remember not to use aggressive detergents and chemicals, or hard and sharp brushes. Clean the coated sheet with a soft brush and water under pressure, or use a detergent designed for coated surfaces. To keep water from seeping under the roofing, wash the roof from the ridge down and to the sides. Let’s also be careful with pressure selection.
