In the next few weeks, I am going to paint the outside walls of my house
with masonary paint but, before this, I have to sort out some fine
mould/algae. They are hardly noticeable but can someone tell me the best
way to treat it? I could wire brush them but that would probably leave
Any guidance would be appreciated.
These only grow in damp conditions so try and eliminate any causes of the
wall failing to dry out such as overhanging trees, or shrubs.
Use a stiff (not necessarily wire) brush to remove what you can. Then
1. Apply a mix of 1 part household bleach to 4 parts water solution to the
wall. Leave 48 hours and then wash off with clean water.
2. Apply a propriety fungicidal solution and follow the instructions on the
If the original growth is severe (which from your post doesn't appear to be
the case) you may need to repeat the application.
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