Wet-seal, or barrier-wall systems such as the Barrier Plate 200 System from Amerian Metalcraft, have long been the preferred choice in building skins where rain screen systems are not suitable. The panels act as the primary seal on the building, preventing any air, water, or vapor from entering the system. In some instances, the Barrier Plate 200 System can be the primary barrier on the building. With the advent of the ice/water shield, however, in most instances, the barrier plate is a secondary system.
Wet seal panels have welded and ground smooth corners, and upon installation a backer rod and caulk are applied in the joints between each panel, concealing the fasteners and completing the weather tight seal.
In some instances, barrier-wall systems are preferred over rain screens due to weather conditions, climate, and areas of high wind loads or pollution. In places such as China and Korea, barrier plate systems are the most suitable weather seal choice for their construction climate for these reasons.