Heavy moss growth can actually form dams that can cause water to back up under the shingles and damage the roof deck.
Cleaning moss off roof shingles.
It s best to clean moss off a roof as soon as you notice it s growing there.
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.
Climb up to the roof and begin scraping off dead moss from the shingles using a putty knife or painter s 5 in 1 tool and working from the bottom up.
Work on one small section at a time which allows you better control of the brush and your scrubbing motions.
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.
A mixture of trisodium phosphate tsp bleach and water will also remove stains.
To learn how to prevent moss and algae from getting on your shingles keep reading.
For deep stains let the roof dry then reapply the cleaning solution and rinse it off again after no more than 30 minutes.
Once the moss has been thoroughly eradicated from the roof take steps to keep moss from returning.
A thick growth of moss works like a sponge keeping the roofing damp for long periods and it can lift edges of shingles making them vulnerable to blowing off in a windstorm.
To clean either.
Use the tool to gently lift away matted moss that has gathered on the flat sections of the shingles.
Before applying a moss remover cleaner use a scrub brush 3 15 the home depot or a long handled soft bristle brush to gently scrape or pluck moss from the roof shingles or tiles.
Scrape off the moss.
Both algae and moss can be easily removed from asphalt shingles with a 50 50 solution of chlorine bleach and water.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye protection.