When you re ready to get started spray your roof using a garden hose with a spray nozzle attachment starting at the top of the roof and blasting downward so the dirty water runs off the sides.
How to power wash a roof.
To clean a metal roof wait for a dry overcast day and make sure you have a partner to help you for safety reasons.
Read on for our best roof cleaning tips.
1 attach a 35 degree spray wand to the pressure washer hose and fill the pressure washer.
Never pressure wash your roof if you have asphalt shingles.
How to prepare your roof for pressure washing.
This is because the water comes out too forcefully and can damage the material.
When you pressure wash use the minimum force possible to pry the fungus free and wash it from the roof.
The first element to consider is the type of power washer that you will use.
Start with a medium pressure spray pattern and adjust from there accordingly.
Always stand on a dry area of the roof as wet shingles can be very slippery.
A regular pressure washer will do a good job in particular if you add some useful pressure washer attachments such as a 15 degree spray nozzle and a good quality detergent.
Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels.
Not to mention using a pressure washer from a high place is dangerous.
Use low pressure to spray it clean the power of a pressure washer can damage the shingles on your roof so it s important that you select the proper spray tip.
The water pressure will remove the granules that are important for protecting your roof.
Of laundry strength liquid chlorine bleach and water.
Use a sprayer attached to garden hose that s filled with equal parts chlorine bleach and water.
Once you squeeze the trigger the powerful recoil on the spray wand can throw you off balance and off of a ladder.