Clean the roof surface with a soft bristled broom to remove loose dirt and larger debris that may clog your gutters are damage the roof while washing.
Wet the roof surface with a garden hose and allow the roof to soak for at least five minutes. This will loosen dried dirt and make cleaning easier.
Sweep the roof again with a soft bristled broom.
Rinse the swept area of the roof in order to decide if cleaning with water is sufficient. If the roof is still dirty, re-wet the surface and allow it to soak for another five minutes.
Apply a small amount of tri-sodium based cleanser to the roof while soaking. Be sure to cover any plants or shrubbery surrounding the house with a sheet of plastic to protect then from the soap.
Scrub the roof again gently with a soft bristled broom.
Rinse the roof well with clean water before the soap has a chance to dry.
Things You Will Need
- Shoes with good traction
- Garden hose long enough to reach all parts of your roof
- Soft bristle broom
- Tri-sodium based cleanser
- Plastic to cover nearby trees and shrubs
- Many roof installation companies offer roof-cleaning services, which are covered under your warranty.