Is Pressure Washing A Roof Bad

Don t underestimate the power of these pressure washers.

Is pressure washing a roof bad.

Not to mention using a pressure washer from a high place is dangerous. Never pressure wash your roof if you have asphalt shingles. It will also leave gouge marks in the lower layers leaving them more vulnerable to the elements. If your house is made from a wood frame with any type of wood siding there is definitely a chance that pressure washing your house will launch water into the siding which can soak through wall cavities flooring wiring insulation and plaster.

Once you squeeze the trigger the powerful recoil on the spray wand can throw you off balance and off of a ladder. Tempting as it might be to blast away unsightly moss and algae using a pressure washer to clean your roof is dangerous not to mention potentially damaging. There is a chance that the pressurized water could damage your shingles. Of course some chemicals can harm your roof as well and the runoff could cause problems with your landscape or parts of your home.

After a good power washing the roof will look great but if too much pressure is used a significant chunk of the roofs life has just been removed it looks better though so imo using a power washer on a roof is a big no no people still do it though and the customer is happy because they don t know that their roof was damaged by the power washing. A main concern that people have is that the hard jet of water coming from the pressure washer nozzle is too strong and will loosen or damage the shingles and thus leave the roof porous and vulnerable to rain. 3 siding damaged or knocked loose. By billie jo jannen it s generally not necessary to pressure wash a shingle roof for the purpose of removing ordinary dirt and leaves and pressure washing can potentially damage the shingles.

So why is power cleaning bad for your asphalt roof. The water pressure will remove the granules that are important for protecting your roof. For starters we never recommend.