Plaster and thermal insulation today can often lead to mold and algae growth. Due to the frequent exposure to precipitation, aversion from the sun, and inability to dry completely again, this side of the house is most affected by weather conditions. Synthetic paints are often used for plastering houses. They retain water and block the drying process, causing a damp environment to develop. In addition to wet basement walls and leaking pipes in the masonry, mould and algae may also grow as a result.