A137.1) for typical installations of tile to be as follows: • All sizes of Pressed Floor and Porcelain Tiles with grout joint widths of 1/16” wide to less than 1/4” wide: Allowable lip- page is 1/32”. • All sizes of Pressed Floor and Porcelain Tiles with grout joint widths of 1/4” wide or greater: Allowable lippage is 1/16”. For reference: 1/32” is roughly the thickness of a credit card. 1/16” is roughly the thickness of one penny. The plank tile you describe is very likely a Pressed Floor and Porcelain Tile. The manufacturer of the tile can tell you whether it was manufactured to the specifi- cations in ANSI A137.1 (it is usu- ally printed on the carton). I would be happy to discuss any questions your builder or tile installation contractor may have about lippage or other installa- tion standards that can have an effect on lippage. – Mark Heinlein – CTI #1112, NTCA Training Director; Technical Trainer / Presenter QUESTION Does a shower pan membrane need to be a solid, continuous piece, or is it all right if one cor- ner is completely sliced up and then caulk applied to all cracks? It seems unsafe, and the weight LATICRETE® TRI-LITE™ is a lightweight, high-performance, tri-purpose mortar designed for large and heavy tile, thin- bed and wall installations. Due to its lightweight formula and smooth, creamy consistency, a 30-lb. bag provides the same coverage as a 50-lb. bag of tra- ditional mortar. LATICRETE TRI-LITE can bond to many suitable sub- strates including concrete, steel and cement plaster. Its incred- ible non-sag performance is able to support very large and heavy tile with ease. LATICRETE TRI-LITE can be used for common appli- cations such as countertops, ceilings and bathtub walls. For more information, visit www.laticrete.com. ASK THE EXPERTS –––––––––––––––––––––––––––––––––––––––––––––––––––– 20 TileLetter | November 2017