round arch casing

A round arch casing is a casing system that frames the side edges and arch line of openings finished at the top with a semicircular arch. The vertical casing pieces wrap the side edges of the opening while the arch piece completes the upper curve, so the opening is emphasised as a single whole. It is used on doors and windows, both indoors and on exterior facades. Round arch casings made from polyurethane are lightweight and mount easily and quickly. They resist moisture and impact, do not crack or swell, and can be painted; they do not change shape under exterior conditions. Polure produces round arch casing sets so the vertical and curved pieces fit perfectly at their joints, providing an integrated frame.