Can You Pressure Wash A Composite Roof

There is a chance that the pressurized water could damage your shingles.

Can you pressure wash a composite roof.

Never aim your pressure washer up the roof as it can push water under the shingles. Any abrasive action removes the protective granular surface breaks the bond between the shingles and damages the fabric of the material. Pressure washing is very effective but may be best for metal or concrete roofs. Composition roofing is a relatively soft material.

Of course some chemicals can harm your roof as well and the runoff could cause problems with your landscape or parts of your home. Always stand on a dry area of the roof as wet shingles can be very slippery.