How can I clean green algae from wooden fence panels?

Green algae can usually be cleaned from fence panels by first brushing with a stiff brush or broom to remove as much of the surface growth as possible, then treating with a mould and mildew cleaner such as Barrettine Mould and Mildew Cleaner. Fence panels that have been become heavily soiled with biological growth may require a second treatment.

Once cleaned, treated and allowed to dry, fence panels should then be treated with a wood preservative, this will help to prevent future growth of mould and algae.