decorative arch with keystone

A decorative arch with keystone is a polyurethane arch model featuring a keystone at its upper crown point. The curve of the arch and the central keystone are applied as a single set; this combination is a common door and window-top arrangement in classical architecture. It is used at living room entrances indoors and above windows and doors on facades. The polyurethane material is light and is applied directly with assembly adhesive; it resists moisture and impact, does not crack, swell or warp, and can be painted. It installs faster than plaster and stone alternatives and is fitted safely at high points. Because it is mould-cast, the arch and keystone details match across every piece. Polure produces the decorative arch with keystone in various opening sizes.