Power Washing Old Roof

Never pressure wash your roof if you have asphalt shingles.

Power washing old roof. Pressure cleaning a roof when done properly using rotary cleaning equipment is safe cost effective and will not force water through or under tiles as the jet angle is controlled and always points away and down the roof rather than into or all over the place which is the case when blasting with a lance or wand is used. Make washing easier by cleaning the highest points first so the dirty runoff flows over yet to cleaned sections. Pressure washing in which highly pressurized water is sprayed on the roof to remove any mold algae dirt or grime and chemical cleaning sometimes called soft washing in which chemicals are the main thing that are removing those harmful things from your roof. The two main methods for roof cleaning are.

The power of pressure washers can be too much of a good thing. The water pressure will remove the granules that are important for protecting your roof. Pressure washing your roof can damage your roof. The high powered water jets can damage shingles and remove the shingle granules that protect the roof.

When you pressure wash use the minimum force possible to pry the fungus free and wash it from the roof. Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels. Most contractors don t recommend pressure washing or power washing a roof. This homeowner attempted to clean his roof and you can see the granules that were removed due to his imprope.

This is because the water comes out too forcefully and can damage the material. Once you squeeze the trigger the powerful recoil on the spray wand can throw you off balance and off of a ladder. Roof designs vary greatly so don t treat this as an absolute must. Don t use a pressure washer on the roof.

1 attach a 35 degree spray wand to the pressure washer hose and fill the pressure washer. Not to mention using a pressure washer from a high place is dangerous.