Algae on roofs can be a very annoying. It’s not as if you walk on the roof daily, to rid of the pesky organisms. Algae can appear on all types of roofs, with it usually appearing due to high levels of humidity.

Algae isn’t actually harmful to roof materials as they don’t develop roots, but of course they’re not visually appealing so would need removing. Green algae is much easier to remove compared to black algae, but the job isn’t impossible. Using non-toxic oxygen bleach is perfect to help get rid of algae. Be careful not to use chlorine bleach as it can cause a load of problems to your roof (depending on material).