The most effective method of cleaning algae and moss from a roof is with a 50 50 mix of laundry strength liquid chlorine bleach and water.
Cleaning moss off asphalt shingles.
You could replace all the roofing with new shingles dark enough to disguise the staining or with shingles laced with copper granules which are lethal to algae.
Apply liquid cleaners with a hand pump sprayer or with a pressure washer on the lowest setting so as not to cause any damage to the shingles.
Always keep your roof clear of overhanging branches and clean your gutters regularly.
Removal can take several months before the moss can be blown away revealing clean shingles underneath.
But that would only make sense if the shingles were worn out.
Apply with a sprayer and allow the solution to dwell on the roof surface for 15 to 20 minutes and then rinse thoroughly with low pressure water.
Apply a storebought or diy cleaning solution to remove the moss.
Spray it across the shingles you wish to clean wait about 20 minutes then rinse them with water.
Removing moss and algae from asphalt shingles.
Never use a pressure washer to wash or rinse shingles.
The bottom line preventing algae and moss from growing on your roof is easier than trying to remove it.
Cleaning asphalt shingles is an important part of protecting your roof.
To stay safe suit up in long sleeves pants and safety goggles.
Hose off and brush all moss loose from your roof shingles.
Don t be tempted to rush getting the moss off faster by having someone power wash your roof or scrub in the bleach solution or brush or scrape off the moss even though you may find advice on.
How to clean algae and moss off asphalt shingles.
Hose off and brush all moss loose from your roof shingles.
While algae doesn t actually harm your roof it can impact its aesthetic appeal.
Wear protective clothing including long sleeves pants and gloves as.
A homemade cleaner of one part liquid chlorine bleach to one part of water can also be effective in removing and killing moss that clings to the roof tiles.
If your moss problem requires more than.
Spray landscape plants near the house with water and cover them with tarps to protect them from chemical overspray and runoff.
Wait for a calm windless day to clean your roof.
The concentrated jet will scrape off the small pebbles on top of the shingles and reduce their water repellency which will only make your mold situation worse.
The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae.
Carefully place a ladder near the area of moss.
If you have a consistent problem with mold growth on your roof consult a roofing professional.