b'ASK THE EXPERTSAsk the Experts Q&As are culled from member inquiries to NTCAs Technical Support staff. To become a member and make use of personal, targeted answers from Technical Support staff to your installation ques-tions, contact Jim Olson at jim@tile-assn.com.QUESTION could possibly help me to deter-Weve been struggling with pro- mine how to gauge what is con-duction when it come to installingsidered out of tolerance and how stackablewalltile.Ivebeento pursue the manufacturer about installing for 31 years and stack- this problem. Thanks for any and able wall tile used to be fairly sim- all insight. ple. It seems that installers today are having more trouble than everANSWERSgetting their footage numbers dueIvenotheardthiscomplaint tobadtilesizing.Weveshownvery often, maybe because of the severalsamplestothefactoryshift away from the use of stack-reps, but the answer always seemsablewalltile. TheANSIA137.1 to comes back as yes, these tilesstandard for size difference seems are actually within tolerance. Goto be a very liberal number allow-figure!Iwaswonderingifyouing quite a bit of difference before 24TileLetter | February 2020'