Cleaning roof shingles is an affordable way to restore your home’s curb appeal, prolong the lifespan of your roof and can be a good idea to improve the health of your home and family. Cleaning your roof can prevent the need for costly replacement in the years to come because algae, mildew and moss will ultimately damage shingles.
It is not advised to use high powered pressure water to clean shingle roofs because this can dislodge the granules in the shingles and that can lead to high heating and cooling costs and lead to premature failure of your roof.
To clean your asphalt shingle roof you will need a special shingle roof cleaning mixture, a low pressure washer, a pump sprayer or, a ladder to access your roof, personal protective equipment such as rubber-soled shoes, safety glasses and a harness.
The Special Roof Cleaning mixture is:
4 gallons of water, 1 gallon of bleach and 1 cup of TSP (Tri-Sodium Phosphate-or acceptable phosphate-free
Apply this mixture with a garden pump sprayer, let sit on the roof surface
for up to 20 minutes, and rinse with low-pressure water.
Be sure to protect any shrubs below. Remember, the
roof surface will become slippery when wet… be very careful!!!