How does mould grow on concrete/brick walls? What does it feed on? There’s even a layer of paint on the walls that further prevents it from reaching any wood if there is behind the walls

Question

How does mould grow on concrete/brick walls? What does it feed on? There’s even a layer of paint on the walls that further prevents it from reaching any wood if there is behind the walls

In: 72

Answer 1

Seeds fly around in the wind and organic material can get stuck to concrete and brick.

Moisture keeps it alive.