If you have an existing framed deck or are looking at new construction involving any elevated heights, multi-tyres or building over or around obstacles – Silca Systems will save you both time and money. Typically converting an existing wood or composite deck to a stone deck would involve full demolition, excavation, poring footings and/or sub-slabs, fallowed by full construction of the new stone structure. Based on current pricing, typical Interlock Decking runs between $18-20 per sq ft. When you take into account concrete footings or a sub-slab the price increases to $25-35 per sq ft and these prices do not include the cost of demolition and debris removal. Silca System will typically run between $10-15 per sq ft, depending on the style of stone you choose and any additional framing that may be required.