Man-made or natural stone can be applied to any clean masonry surface, whether concrete or cinder-block. The key is for the surface to be clean, i.e., no sealer, parge or paint can be on the surface.

However, if the foundation has been covered with one of those materials stone can be applied but additional steps are required. Namely, a diamond metal lath must be attached and a scratch coat of mortar applied to which the stone is then laid.