TI-PROBOARD is a sustainable, durable and virtually maintenance-free underlayment for exterior deck porcelain tile installations.  The underlayment panels are unaffected by expansion, contraction or exterior weather conditions. The 12" panels are available in lengths of 8' and 12' and can be cut to length with a wet saw. TI-PROBOARD panels are installed directly over joists 16" on-center without the need for deck boards or other support. Simply fasten the interlocking boards to the deck framing, fill the surface with a scratch coat and then lay porcelain tile with thinset adhesive. TI-ProBoard won’t warp or support the growth of mold, and is approved for commercial installations. Applications include decks, balconies, exterior floors, base for counter tops, outdoor kitchens, Three Seasons rooms, indoor kitchen floors, bathrooms, mud room floors and as a base for 3/4” concrete. 

Features & Benefits:

  • Easy to install - No need for deck boards or plywood substrate 
  • Superior freeze/thaw performance and low expansion/contraction coefficient
  • Extra-heavy floor rating - Won't expand, contract or warp
  • No flame spread
  • Inhibits mold and mildew
  • Commercially approved rating


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