Step 5 let solution soak in.
Romoving stains off of roof shingles.
Set the nozzle at the highest pressure setting and hold it 12 inches from the shingles.
Roof cleaned with oxygen bleach left and chlorine bleach center.
Remove shingles in a 2 to 3 ft wide section as you work down the roof.
After mixing spread the solution on the shingles with a spray pump or soft scrub brush.
If you do granules will come off the shingle and affect your roof s waterproofing.
Continue tearing off the shingles and underlayment until you reach the roof jacks then start over at the top of the roof.
This article describes the causes cures for white stains or white deposits on building roofs.
We discuss roof cleaning approaches using chemicals and the most gentle possible means so as to avoid damaging.
Push the shingles down to the roof jacks.
After 15 to 20 minutes rinse the solution off with a sprayer that has enough force to dislodge algae and moss without damaging the shingles.
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We describe common causes of white blotches or staining on roofs of different materials.
Removing algae stains from roof shingles is easy with the right technique.
Here is a diagnostic guide to types of stains and staining materials found on roof surfaces black red green brown or other coloured stains on asphalt roof shingles or on other roofing materials need first an accurate diagnosis of the stain cause and then proper steps to remove the stain or to prevent future staining on roof shingles surfaces.
Spray the roof with the vinegar.
Mix the oxygen bleach with water and spray it onto the roof with a pump sprayer.
White stains on building roofs.
The shingles will roll up like a ball in front of the fork.
A mixture of trisodium phosphate tsp bleach and water will also remove stains.
Oxygen bleach lightens stains as well and is less harmful to the environment but it doesn t produce as immediate or dramatic an effect as chlorine bleach.
Work your way across the roof from left to right and top to bottom.
To learn how to prevent moss and algae from getting on your shingles keep reading.
Saturate the shingles especially those with rust stains.
Before the vinegar dries but after it sits on the rust for a little bit about five to 10 minutes on an overcast day scrub it with the push broom or the scrub brush.
For deep stains let the roof dry then reapply the cleaning solution and rinse it off again after no more than 30 minutes.
Allow the oxygen bleach to sit on the shingles for 20 minutes.
You may apply gentle pressure to the stained areas but do not scrub quickly or with any force.
The oxygen bleach will attack the algae and start to remove it.