After you have killed the moss on your roof you must remove the dead moss manually or it will act like a sponge and soak up water further promoting decay.
Moss on flat garage roof.
As a rule of thumb professionally removing moss will cost about 5 of what it would take to replace your roof altogether.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye protection.
Less easy but of far greater importance is the next step of removing the dead moss from the roof.
You will need to treat the roof to stop the moss from growing back.
Another option for removing moss without damaging the roof shingles is to use zinc or copper strips these are long strips of metal that are installed below the ridges of roofs and are at their most effective when installed on a new roof before moss and algae have had the opportunity to grow because it makes the roof an inhabitable area but they can also be retro.
While it does not directly damage the building unlike termites for example it can shorten the life of wood metal asphalt concrete or clay roofs simply by encouraging water to stick around in its shallow root system.
This means that it needs flowing water in order to reproduce and survive and provides a great indication as to why you won t find moss on an area of a roof that receives a large amount of sun.
If moss can slowly grow on these areas then.
Step 1 understanding moss.
If you want to clean moss off a roof yourself you will have to plan how you are going to kill the moss and remove it effectively.
Zinc copper strips.
The removal of moss from a flat roof is very important as moss will cause damage to many types of roof coating if allowed to grow as well as rolling into gutters which can cause blockages.
Moisture promotes wood rot and concrete decay.
Both tasks work hand in hand to ensure the longest possible lifespan for your roof.
Hose off and brush all moss loose from your roof shingles.
The cost depends on the size of your roof the amount of moss and the labor rates in your area.
More importantly as many types of roof coating start to age they will slowly form small bumps and impressions.