Exposure to dampness and mold in indoor environments has received significant attention in recent research. This review focuses on studies looking at the impact of dampness, moisture and microbial agents on children's health. We then look more broadly at how research studies have tried to describe dampness and exposure to moisture. Papers published from 2010 onwards were reviewed and are briefly summarized. Most of the papers using dampness as a proxy for microbial exposure focused on respiratory tract infections, especially asthma. This review highlights new findings and also discusses the variety of approaches used to assess dampness in indoor environments.