Quick view Compare Add to Cart TIPROBOARD12: TI-ProBoard - 12' Length TI-ProBoard® is a sustainable, durable and virtually maintenance-free underlayment for exterior deck porcelain tile installations. It is a composite panel that is unaffected by expansion, contraction or exterior weather conditions and acts as a... MSRP: Was: Now: $153.41 Quick view Compare Add to Cart Quantity Add to Cart