Scrape off the moss.
How to clean moss from roof shingles.
Heavy moss growth can actually form dams that can cause water to back up under the shingles and damage the roof deck.
The high powered water jets can damage shingles and remove the shingle granules that protect the roof.
Both algae and moss can be easily removed from asphalt shingles with a 50 50 solution of chlorine bleach and water.
Apply a storebought or diy cleaning solution to remove the moss.
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.
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.
Use the tool to gently lift away matted moss that has gathered on the flat sections of the 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.
But that would only make sense if the shingles were worn out.
Cleaning asphalt shingles of clumps of moss or algae that have taken root in the roof can feel like an overwhelming endeavor.
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.
Once the moss has been thoroughly eradicated from the roof take steps to keep moss from returning.
How to remove roof moss fast before it damages your shingles.