Unitized Terracotta Rainscreens – Water is the most significant factor in the premature deterioration of building envelopes. It causes rotting of metals, molding of organic materials, and unintended stresses due to freeze thaw cycling. Three conditions are required to allow water movement through building envelopes: A source of water. A pathway for water to flow. A force to drive water along the pathway. If any one of these conditions is…