An improved cladding for covering the exterior facing surfaces of an exterior trim member of a building structure is disclosed which includes means for concealing holes in an exterior surface portion of the cladding formed by or for fasteners driven through the surface portion into the trim member to join the trim member to an adjacent structural member. The concealing means includes a tiltable flap hingably attached along one edge portion thereof to an exterior corner of the cladding. The flap is tiltable between an open position wherein fasteners can be driven through a flap underlying surface portion of the cladding and a closed, operative position wherein the flap is held flush against the underlying surface portion of the cladding to conceal the fastener holes therein from view. Different arrangements for securing the flap in the closed, operative position are also disclosed.