Painting Over Moss

Cover any bushes or flowers growing directly beneath the affected area, using a cloth or tarp.

Apply a commercial moss-removing agent or diluted bleach to the moss. Commercial agents usually are packaged in a concentrated form. Mix the commercial product with water as per the manufacturer's instructions and pour it into a sprayer. Alternatively, mix bleach with water at a ratio of at least 3-parts water to 1-part bleach (can be as diluted as 10-parts water to 1-part bleach) and pour it into a sprayer. Spray the mixture onto the moss. Use a soft broom to loosen the moss from the surface.

Rinse the treated area with plenty of fresh water and allow it to dry completely. Use a pressure washer or the most forceful setting on the nozzle of your garden hose to remove all traces of the moss and the cleansing agent.

Allow the area to dry completely. Bleach-treated surfaces should be allowed to weather prior to repainting. Paint the dry and weathered surface as usual, following the manufacturer's instructions.