We are members of, and certified by, the Interlocking Concrete Pavement Institute (ICPI), assuring you of our efforts to provide the highest quality of installation. ICPI certification involves in depth training in the complete installation of pavers. This involves all aspects of the installation, including the identification of soils to provide the necessary information required to design the complete installation. The installation of pavers and retaining walls is very much like most construction, it is only as good as the base (foundation) on which it is built.