ing a system warranty specific to this job. Please also refer to ANSI A108.01 2.6.2.2 as an important reference for this installation. It is necessary to ensure the substrate meets industry standard flatness requirements found in the ANSI Standards and TCNA Handbook. Please refer specifi- cally to ANSI A108.01 2.6.2.2. Generally speaking the standard is: • 1/4” in 10’ for tile with any side less than 15” • 1/8” in 10’ for tile with any side 15’ or longer • Flatness can be checked with a 10’ straight edge. Financial allowances must be included in the specification, and proposal for labor and materials to flatten and otherwise prepare the substrate must be included in the specification and proposal. Tiling over sound existing tile as a substrate is an excellent way to proceed. As with any tile installa- tion, careful research, proper plan- ning, using the recommendations of industry standards, following manufacturer instructions, using a system approach, good communi- cation and documentation before you proceed will mean a great and long-lasting installation and will make all parties happy with the end result. You are already on the right path. I hope this helps! – Mark Heinlein, NTCA Trainer/Presenter ASK THE EXPERTS –––––––––––––––––––––––––––––––––––––––––––––––––––– CUSTOM SERVICES cutting bullnose stair treads scoring 785-437-2792 kawvalleytile.com CUSTOM TILE FABRICATION CUSTOM SERVICES excellent craftsmanship fast turnaround excellent craftsmanship fast turnaround You provide the tile, we provide the service. Call for a quote today! a division of Fox Ceramic Tile 24 TileLetter | August 2017