Time to go to school KVBster
The Condensation Process Condensation occurs when warmer moist air comes in contact with cold surfaces such as framing members, windows and other accessories, or the colder region within the insulation envelope (if moisture has penetrated the vapor retarder). Warm air, having the ability to contain more moisture than cold air, loses that ability when it comes in contact with cool or cold surfaces or regions. When that happens, excessive moisture in the air is released in the form of condensation. In metal buildings, there are two possible consequences of trapped moisture in wall and roof systems: (1) corrosion of metal components and (2) degradation of the thermal performance of insulation.