A keystone is the wedge-shaped stone at the apex of a vault or arch, or similar shaped window or door. If used structurally (with cast stone it can also be purely cosmetic as a facing with an actual keystone behind), the keystone is the final piece placed during construction and locks all the stones into position and therefore allows the arch to bear weight. Keystones are a popular architectural feature that can greatly enhance a building’s façade and create a stunning focal point.
Keystones used for arched windows and doors are an attractive addition to a more traditional new property, with research showing that the use of cast stone features adds value to new properties.
Using a cast stone keystone to replace a keystone in natural stone on a renovation project is ideal, as the replacement cast stone keystone can be colour matched to other existing natural stonework. The lightweight installation of cast stone keystones is relatively simple.
The finish of the cast stone replacement will be highly authentic, and this the result of our huge expertise and experience in cast stone technology. We supply standard keystones in a range of styles and colours, with options for both structural keystones and those which are effectively a facing to a separate structural piece. If our standard range is not suitable for your requirements, we are able to produce bespoke cast stone keystones in any design and colour.