Occurrence and control of molds and algae on paints

A description is given of the ways in which molds and algae affect buildings, especially painted surfaces, and of some of the factors which promote or control their growth. Design details, such as avoidance of water runs or external water retentive surfaces, and conditions leading to internal condensation are at least as important in controlling growth as the formulation of paints and the use of biocidal addatives. -- AATA