Extruded aluminum moldings are attached to the substrate. The panels have Z clips on the back face which slide down into the Z molding attached to the substrate. The Z moldings are mechanically fastened to the substrate. The panels are then inserted into the moldings.
Plates on the back of the panel extend into the joint. Screws attach the plates to the substrate. The backer rod and sealant at the joint conceal the screws. All fasteners are concealed and panel joints (1/2” typical) are finished with an approved sealant.
Structural Silicone is used to attach the panels to the substrate.