To restore a roof affected by fungus it is recommended that the roof be washed down with a 2 sodium hypochlorite solution.
How to remove lichen from colorbond roof.
To assist in making up the solution table 1 below shows the dilution required for different strength bleaches to give a 2 solution.
Many people try to remove lichen by brushing and scraping it off with abrasive tools.
This step is optional.
For best results count on a qualified colorbond roof cleaner.
Can be used on a variety of roof surfaces including clay tile concrete tile deterministic colour steel super 6 slate synthetic tiles poly carbonates.
The sodium hypochlorite solution can be made up from commercially available bleaches.
Use a stiff brush such as a pushbroom to scrape away any stubborn mold or lichen patches.
30 seconds roof treatment.
Add a small amount of household detergent such as dish soap to the diluted bleach solution to improve wetting.
Apply the bleach solution by using a soft bristle broom to.
These elements can include tar graffiti grease oil or paint.
Lichen can be a tough growth to remove due to the symbiotic relationship between the fungus and algae.
This cost effective non bleach based roof cleaner can be used to treat most types of roofs surface types.
In addition to rotting and possibly damaging your roof.
Solvents are also an option to remove stubborn non water elements that may come in contact with your coated colorbond roof.
While this is a popular approach a great deal of time and work must be put in to remove lichen this way.
Cleaning lichen off a colorbond roof isn t easy and it s much safer to hire a professional roof and gutter cleaner to do this work for you.
Clean up any organic matter on the roof such as twigs leaves or other debris.
Allow the lichen to dry for 1 to 2 hours the key to successfully cleaning and removing lichen is to apply the bio shield solution to saturate the lichen through to the base of the growths and ensuring it does not dry out to quickly.
Regular washing of a roof surface will help to remove materials that adhere to the roof and promote algae mould and lichen growth dulux s roof care guide some factors may require you to get your roof cleaned more often.
Lichen and green moss growth on a slate roof.
Aim to allow drying over 10 to 15 minutes to ensure the bio shield gives a good kill.
You ll need to use a solvent to clean only the parts of your roof that are stained don t use solvents to clean the entire roof.