Vendor Information: StoneDek System Transforms Wood Decks to Stone Decks. StoneDeks System is based in Northeast Ohio and is celebrating its 12th year in business. StoneDeks Systems Silca Grate is made in the U.S.A. by Sare Plastics and has shipped all across the U.S.A and Canada and there is also a manufacturer distributor in New Zealand. The Silca Grate uses environmentally-friendly recycled materials to provide a structural underlayment(sub-floor) for building elevated or raised decks. It is engineered to support the weight of a variety of decking materials including stone brick pavers slate travertine pavers marble and granite which provide an excellent alternative to traditional decking materials like lumber or composite lumber.