Quick view Compare Add to Cart TIPROBOARD8: TI-ProBoard - 8' Length TI-ProBoard® is a sustainable, durable and virtually maintenance-free underlayment for exterior deck porcelain tile installations. Our TI-ProBoard is the only Structural Ribbed Self-supporting Boards (SRSB) on the market. It is a composite panel that... MSRP: Was: Now: $86.08 Quick view Compare Add to Cart Quantity Add to Cart