In large structures, moisture seeps in through air that migrates into the environment from the climate outside. This leakage has the ability to bring more moisture into a large structure than could occur through vapor diffusion alone. This moisture can actually migrate far enough into a large structure to turn back to water. This liquid water corrodes metal, especially in the building assembly, which allows mold to grow and saturates building materials. This is why your large structure needs an air barrier. Air barrier systems are designed to stop infiltration of water vapor into the structure. Mar-flex’s air barrier systems are guaranteed to protect your building envelope from the harmful effects of moisture laden air. Choose Mar-flex for the effective, affordable, and reliable solutions you can depend on time and time again.