There are a couple of methods of removing moss.
How to remove moss from a felt roof.
After a few minutes hose the area down with water and check.
The first is to use a bleach and water combination.
Put water over the roof and moss and then put bleach onto the moss this will turn the moss brown in minutes.
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.
First knock away any large lumps of moss with a brush or broom.
Moss can be removed physically with water and a stiff brush on a pole or a scrub brush chemically or a bit of both.
Experts recommend that you save roof moss removal for a cloudy day.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye protection.
Even so you will always need to mount the roof later on in order to remove the dead moss.
The bleach will kill the algae or moss but rinsing won t necessarily leave the roof sparkling clean.
An alternative to manually removing the moss with a brush and trowel is to use chemicals.
Mix the bleach with the water in a large bucket.
If you need to get rid of moss on your roof the hardest part is the labor required.
Again many years of roof life are lost to power washing.
Get a stiff bristle scrub brush and attach it to the end of a pole if you don t have a random pole hanging around a broom will work as well.
This is oof cleaning products which should be left to absorb into the moss for at least 20 minutes will not evaporate as quickly as they would on sunny days.
In my experience kill the moss let it die and in a few weeks manually remove the dead moss with a soft cedar shingle it s not easy but it works.
Liquid moss killers cover the roof more evenly than dry powders and they let you stay on the ground for the application.
Letting the moss slowly roll down your roof and into the gutters just clogs up the gutters downspouts and underground drains.
Algae will disappear and wash away with subsequent rains the association advises.
More importantly as many types of roof coating start to age they will slowly form small bumps and impressions.
Carefully get up to your roof and brush downward to knock the moss.
