Wet mossy and soapy tiles are slippery.
How to soft wash a tile roof.
If you are to step directly on the tiles place.
By comparison a fire hose sprays at 150 to 300 psi.
Start at the ridge of your roof the top and spray down toward the gutters.
Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels.
So to answer your question.
Using a balanced method of lower pressure 45 psi proper products and allowing cleaning solution the time it needs to clean soft washing eliminates the problem instead of merely spraying at damagingly high pressures for an initial surface fix.
Using a pressure washer set to a low psi rinse loose debris off your roof with clean water.
A low pressure washing rinses everything away reducing the risk of damage to shingles and tiles and other materials.
Doing this ensures that debris is always heading in the right direction off your roof.
Shoes with good traction will give you additional hold and balance while.
Use shoes with good traction.
All these terms mean is a sensible use of pressure to rinse the roof without damaging the shingles or roof tiles.
Spray the roof with plain water to dislodge loose dirt and debris.
Important safety guidelines to follow when cleaning tile roof.
Wash safe roof wash is a strong concentrate.
So to get in front of the question of a pressure washer the term soft wash roof cleaning became one of several roof cleaning buzzwords.
Step on the lower portion of the tiles.
The surfactants used for soft wash cleaning seep into the nooks and crannies of a roof and soften and dissolve thick dirt mud sand and even storm debris.
High volume low pressure rinse roof shampoo and others.
The two main methods for roof cleaning are.
The average garden hose sprays water at 40 to 80 psi.
Cover and avoid all windows when spraying.
Pressure washers use 1 300 to 2 800 pounds per square inch to strip dirt moss and even paint from a surface.