Dampness results from water incursion either from internal sources (e.g.
leaking pipes) or external sources (e.g. rainwater). Dampness becomes a
problem when various materials in buildings (e.g., rugs, walls, ceiling tiles)
become wet for extended periods of time. Mold is a fungal growth that forms
and spreads on various kinds of damp or decaying organic matter. There are many
different mold species that come in many different colors. Molds are sometimes
referred to as mildew. Excess moisture is generally the cause of indoor mold
growth.

Health problems associated with excessive damp conditions and mold include:

• - allergies


• hypersensitivity pneumonitis


• asthma

When health problems are believed to be caused by exposure to mold in the
workplace, owners and managers should:

• Advise workers to see their doctor for proper diagnosis and treatment


• Evaluate the work area for evidence of mold and dampness


• Repair leaks and remediate water damaged materials


• Communicate with workers about areas of the building with evidence of mold or
  moisture damage and provide the status of remediation plans


• Arrange for relocation of workers whose doctors restrict them from the
  implicated work environments

More info

AplusA-online.de - Source: National Institute for Occupational Safety and Health (NIOSH)