Abstract: A panel fastener construction is used for fastening a plurality of building panels to a primary structure with a uniform gap interposed between each vertically adjacent panels. The panel fastener construction comprises a plurality pair of upper and lower upward supporting hooks provided on the primary structure with the upper and lower upward supporting hooks vertically spaced from each other, and a pair of upper and lower downward catching hooks provided on the exterior side of each panel for engagement with the upper and lower upward supporting hooks, respectively, of the primary structure. The height of the downward hooks is slightly less than the inter-panel gap.

Abstract: An exterior wall of a building, comprises: a plurality of panel units each of which is constructed of: a frame member constructed of a right and a left vertical member together with an upper and a lower lateral member horizontally interposed between the right and the left vertical member; and a plurality of panel members mounted on a front surface of the frame member in such a manner as to be parallelly spaced apart from each other by a predetermined joint space. The plurality of panel units are mounted on a front surface of the building through a plurality of mounting brackets in such a manner as to be parallelly spaced apart from each other by the same space as that of the joint space.