Source: Great American Environmental Division, May 2013
During a particularly heavy storm, rain water gathered in a puddle on the roof of an office building. Due to a clogged drain, the water level rose higher than the installed protective flashing and entered the drywall behind office furniture. Over time, mold began to grow in the obscured area and was not discovered until odors were noticed, leading to a costly clean up and the potential for bodily injury claims from tenants.