Moisture is a crucial food for the growth of algae/moulds. Algae/moulds growths are presumably to occur in damp conditions or on the surfaces with high moisture content. Also, areas that tend to be receiving little or no direct sunlight can anticipate algae/mould growth at a fast pace.

How do you stop algae growing on walls?

Regular maintenance and cleaning should always be part of long term planning for a structure. Chips or cracks that develop for any reason should be quickly repaired to prevent algae or fungus growth from beginning to happen. Surfaces should also be cleaned on a regular basis to prevent algae or fungus growth.

What's the difference between algae and mold?

Algae and mold are different but equally harmful to your property. Mold is a fungus that will eat nutrients to survive. Algae is more plant-like and eats the limestone filler in shingles and organic matter on a home’s siding.