How to remove mould from an exterior wall

Task difficulty: Very easy

Part of your external wall has gone mouldy and so you want to remove the mould, and stop it from returning.

You will need

Step 1

Wait for a dry, non-windy day and protect any nearby flowers and foliage from overspray by covering them with a dust sheet or plastic sheeting.
Step 2

If the mould is growing through a layer of paint, strip back to bare masonry.
Step 3

Wearing gloves and eye protection, twist the trigger nozzle to 'on' and spray onto the affected area until it is thoroughly wetted - try to avoid the liquid from running-off onto other areas.
Step 4

Wait for the area to dry, and then brush off the mould using a stiff brush.
Step 5

A second application may be required a few days later. Once you are happy that all of the mould has been removed, rinse the surface well and leave to dry.
Step 6

Once thoroughly dry, the wall can now be painted if required. A final light coat of spray can be applied 14 days later for added protection against re-growth.