- Made from either concrete or clay. They are made with protrusions or spacers built into the sides to create a space between each paver. As they are laid in the sand, the joints between each paver are filled with sand. This works to lock the pavers in place. They are very strong and do not chip. They are set in sand rather than mortar and out-perform mortar-set stones and brick in durability, strength and flexibility (the ability to resist cracking).
