/what is cast stone?


Cast stone has been used as a core building material for hundreds of years, with its earliest use being traced back to the year 1138 at Carcassonne in France. It is a Portland cement based architectural precast concrete product manufactured incorporating high quality fine and coarse aggregates.

The British Standard definition for cast stone is “any material made with natural aggregates and acementitious binder that is intended to resemble and be used in a similar way to natural stone’’.

It has caught the imagination of architects and indeed their clients as it offers distinction by greatly enhancing and complementing the other building materials on a façade. It is regularly used in areas with sensitive planning constraints or where quarried natural stone is the prominent material.

The use of cast stone also offers the designer flexibility to choose their required colour, texture, finish and stone unit dimensions. Frequently manufactured products include finishes to replicate quarried natural Portland and Bathstone with a performance superior to quarried natural stone with regard to its increased strength and reduced moisture absorption, resulting in improved freeze/thaw durability.

This opens up a new range of options to the designer such as bespoke sized units with stand-alone structural performance which is not achievable from quarried natural stone.