Abstract: A covering system for a building substrate is disclosed. The covering system comprises at least two panels having two opposite, gutter shaped joints, and a joint linking system comprising a cleat configured to accept the adjacent joints, a compression cap configured to bridge the adjacent joints, means for attaching the compression cap and cleat to the building substrate, and a cover cap configured to lie flush with the panels and conceal the compression cap and the attaching means. When assembled, the covering system forms a watertight seal on and prevents water leakage into the building substrate. Further, the covering system provides hidden fasteners, an internal drainage channel which removes any moisture that migrates into the system, and joints which allow for expansion and contraction of the panels during assembly and in the course of environmental changes once installed.