High-quality and durable, stone decks built with the SilcaGrate system are low maintenance, engineered for strength and easy to install. You will no longer need to replace your deck every few years. Comprised of a hexagonal underlayment that is made from thick engineered polymer, it provides support every two inches, easily supporting the heavy weight of stone or pavers installed on top. Concerns about heaving or settling are eliminated and no excavation or backfill is needed; helping to keep your project affordable. SilcaGrate is sustainably produced and made in the USA.