Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels.
How to wash a roof.
Most contractors don t recommend pressure washing or power washing a roof.
Step 1 choose a cool and overcast day.
This is because the water comes out too forcefully and can damage the material.
Just spray it on and leave it.
Use the sprayer to saturate a strip 3 feet high x 10 feet wide.
That way you always stand on dry surface and reduce the chance of slipping.
In addition choose a day with little wind so that when you spray the solution it stays on your roof 1 x research sourcestep 2 perform maintenance on your roof.
For any of these homemade options you ll want to wet down the roof with plain water first then apply the cleanser and let it sit for 20 to 45 minutes.
Lightly scrub with a soft bristle brush.
Wait about 20 minutes then rinse.
That ll prevent the cleaner from drying out too quickly.
Use a sprayer attached to garden hose that s filled with equal parts chlorine bleach and water.
It will rinse off the next time it rains.
Then spray the cleaner onto the shingles photo 1.
This is the best way to clean a roof if you have asphalt shingles.
Before you begin it s important to repair loose shingles and flashings to minimize roof damage.
Spray the cleaner on a section of roof and let it sit for about 15 minutes.
The best way to clean a roof is to use a roof cleaning chemical and let it sit for awhile.
Start at the lower portion of the roof moving up as you clean each lower section.
Cleaning roofs is slippery work.
With most good cleaners that s all you need to do.
Before applying the cleaner spray the roof with water to cool it down.
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.
Sunlight and warm weather will ensure the cleaning solution dries too fast to be of any use.