Many homeowners turn to the internet when the time comes to replace their roof, searching online for tips such as the best materials to use. However, there are a lot of myths in circulation about roofing and they can cause you a lot of trouble down the line. It’s safest to trust roofing advice from professional, certified roofers only to ensure that you’re given the correct information and expert advice.
Using a pressure washer will cause more harm than good when your shingles and underlayment become damaged form the pressure.
Using a pressure washer to clean your roof will void your warranty.
If there is a lot of discoloration on your roof and you'd like to resolve the issue, the only effective method to do so is to replace the entire roof.