Abstract: An elongated siding panel and a longitudinally extending panel attachment and support strip have overlapping edge portions with longitudinally spaced slots receiving corresponding hook-shaped tabs to form loose positive connections. The slots have a length longer than the tabs to provide for limited longitudinal movement of the panel relative to the support strip. The panel and strip are preferably formed from an extruded flat strip of semi-rigid plastics material, and the continuously formed panel and support strip are progressively notched at longitudinally spaced intervals to form the slots and tabs. The notched support strip is progressively severed from the panel, twisted on a longitudinal axis, and the tabs are progressively inserted into the slots for hooking the overlapping edge portion of the panel.