Simply put, no! You should never apply high pressure to a roof. Roof tiles are not designed to withstand high pressure and can tear easily with even a low powered pressure washer. Additionally, you can deposit water under the shingles creating leaks and further damage. Some roofs, like metal roofs, can withstand a bit more pressure but are sometimes painted. The high pressure can damage the paint or get under the top cap leaking into the attic space. Always, consider hiring a licensed, bonded, and insured professional for roof cleaning. For a Free & Fast Quote Visit www.powercleanproservices.com/quote Follow Us On Facebook https://www.facebook.com/PowerCleanPS