Sunlight and warm weather will ensure the cleaning solution dries too fast to be of any use.
How do they pressure clean roofs.
Start off with a hot water pressure with a 40 degree tip.
Roof cleaning can be achieved by manually removing any excess moss and then applying the correct chemicals to the tiles.
This approach doesn t involve any water no mess and won t damage the tiles.
Boral roofing warranty eagle roofing glossary.
Roofs with steep slopes might be dangerous to work on with a pressure washer and is recommended to use chemical cleaning methods on such roofs.
They also highly suggest limiting roof traffic.
Before you begin it s important to repair loose shingles and flashings to minimize roof damage.
To clean a metal roof wait for a dry overcast day and make sure you have a partner to help you for safety reasons.
You only need low pressure on metal roofs as it is enough to disturb and clean them.
Never aim your pressure washer up the roof as it can push water under the shingles.
Most commercial pressure washers operate at about 4 000 psi.
Spraying water under your shingles can both tear off the shingles and force water under them and into your home.
Use a pressure washer which can loosen shingles and seriously damage your roof.
Aim the pressure washer down the roof toward the gutters and keep the tip of the wand at least a foot away from the surface when starting.
Using high pressure to clean a tile roof is a crude and invasive form of cleaning.
This is very effective at getting rid of algae and mildew both of which often grow on metal roofs.
We recommend hot water because metal roofs can handle it and hot water is more effective.
Instead of relying on high pressure to remove the algae and dirt we use soaps and tile roof cleaning chemicals specially designed to clean your roof the safest and most long lasting way possible.
Use a sprayer attached to garden hose that s filled with equal parts chlorine bleach and water.
Before applying the cleaner spray the roof with water to cool it down.
Pour it into a pump sprayer strap yourself into a full body harness tie it down and climb to the roof.
This is the best way to clean a roof if you have asphalt shingles.
Then spray the cleaner onto the shingles photo 1.
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.
Read on for our best roof cleaning tips.
Roofs with gentle slopes are easier to clean since they provide a leeway for walking easily on the roof.
They keep the tip of the nozzle inches from the surface at 4 000 psi not 1 2 feet at 1 200.
Have you seen how most pressure washers clean the tiles.
The day you perform deep cleaning on the shingles should be cool and overcast.
Step 1 choose a cool and overcast day.
Of laundry strength liquid chlorine bleach and water.
Read more about why pressure washing a roof is a very stupid thing to do.
