Abstract: A wall panel joint apparatus and a system using same is disclosed. The wall panel joint includes a perimeter joint body having a predetermined size and shape. The perimeter joint body floatably attaches to at least two wall panels. Embodiments include where the wall panel joint includes one, two, or more chambers in addition to the wall cavity. The system includes at least two wall panel joints that attach the wall panels to an architectural wall. At the point of intersection of the joints, the joints are mitered. The system also includes a wall attachment device and a means for attaching the joint to the wall attachment device. The system is liquid water impermeable, air permeable, and water vapor permeable system, providing a ventilated, waterproof wall panel attachment joints for use in same.

Abstract: A wall panel joint apparatus and a system using same is disclosed. The wall panel joint includes a perimeter joint body having a predetermined size and shape. The perimeter joint body floatably attaches to at least two wall panels. Embodiments include where the wall panel joint includes zero, one, two, three or more compartments. Also, some embodiments include a rainscreen clip that forms an additional compartment. The system includes at least two wall panel joints that attach the wall panels to an architectural wall. At the point of intersection of the joints, the joints are mitered. The system also includes a wall attachment device and a means for attaching the joint to the wall attachment device. The system is a liquid water impermeable, air permeable and water vapor permeable system, providing a ventilated, waterproof wall panel attachment joints for use in same.