keystone door arch

A keystone door arch is a polyurethane decorative arch arrangement formed by placing a keystone at the top point of the arch above a door opening. On classical-style interior and exterior door openings it is used to emphasise the arch line and the centre point; it integrates with the side surrounds and arch profile. The polyurethane pieces are lightweight and applied to the surface with mounting adhesive and screws; they resist moisture and impact, do not crack or blister, and are paintable. Being much lighter than a real stone arch, installation is fast and no additional load-bearing support is required. Being mould-cast, the arch and keystone details are identical on every opening. Polure produces the keystone door arch in different span sizes.