Can I pressure wash my roof?

A high-pressure wash on shingles can cause striping of granules. Therefore, it isn’t advisable to use a high-pressure washer on your asphalt shingles. Similarly, pressure washing tiles will erode the finishing making it need more cleanings.
On average cleaning, a roof should be done from after five years since installation, and you should use a soft wash system that uses low pressure. Low pressure doesn’t loosen or cause damage to the roof.