It can take up to 4 to 6 weeks for the moss to come off the roof.
Power washing roof is it bad.
Once you squeeze the trigger the powerful recoil on the spray wand can throw you off balance and off of a ladder.
The fact is a professional that knows how to use his equipment can pressure wash a roof with as little as 200 p s i.
But pressure washing your asphalt roof will do more harm than good.
Power washing takes 5 years off the roof surface.
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.
I suggest you make amendments to your article just to be on the safe side.
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.
Roof materials aren t designed to be pressure washed with an average pressure washer.
We apply a special blend of soaps and let the rain rinse it off.
Roof cleaning takes tools designed for the job.
There will be some granule loss under the moss and lichen.
Don t try to pressure wash a roof like you would a fence or a sidewalk as doing so could cause damage to surface tiles or shingles while also creating moisture damage.
You don t ever power wash a roof.
With roofs its not pressure washers that damage the roof it s high pressure.
Yes it will make it look sparkling clean but also you ll end up replacing the roof system sooner rather than later.
And still be rinsing at 5 g p m.
The two main methods for roof cleaning are.
When you pressure wash use the minimum force possible to pry the fungus free and wash it from the roof.
Never pressure wash your roof if you have asphalt shingles.
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.
You soft wash a roof.
But that is normal.
Pressure washing strips the granules from asphalt shingles.