Sto is a leading supplier of exterior facade insulation systems and manufacturer of high-quality exterior & interior render cladding systems and coatings worldwide. As the authorized partner of Sto for New Zeaalnd, we are committed to the Sto philosophy. "Building with conscience." Having developed a full range of render systems, and that have been tested and certified by BRANZ for New Zealand construction industries, Sto is trusted as a leader in exterior and interior render facade, cladding, repairs, and restoration markets.