b'ASK THE EXPERTSincidencefromnaturallightonacontractor and the installer are the floor. I have listed references on thelast line of quality control before the following page for more informationinstallation goes in. When or if there on this topic. isaproblemafterinstallation,itis You are also correct in noting thatthe installer and installation contrac-lippage tuning devices can help mit- tor that gets the call. The installation igate these issues. The job of thesecontractor needs to have an excellent devices is NOT to take the place ofworkingknowledgeoftheindustry anyofthestandardrequirementsIstandards,methodsandbestprac-described above, but they can be atices to be able to adequately com-useful tool to help installers removemunicate the potential issues during the last bit of human error (typicallythebiddingprocessandBEFORE a maximum allowed 1/32) and tothe installation takes place. To avoid holdthetilesinplacewhiletheissues,contractorsandinstallers bond coat cures. I have listed refer- shouldempowerthemselveswith encesbelowformoreinformationthisknowledgeandknowhowto about these devices. identifyproblemsandtostopand I do not know why manufacturersidentifyaresolutionbeforepro-or distributors might show tiles in anceeding with the installation. Other offsetpatternthatisdifferentthantrades and professionals such as gen-whatisrequiredforaspecifictileeral contractors, architects, specifiers or by industry standards. It could beand designers will respect a knowl-oversightorlackofknowledgebyedgeable tile contractor that is able the person designing or creating thetoclearlycommunicatewhatmust mockups. be accomplished and why. Mockups You are correct that it very oftenare a key element of this process and falls to the tile installation contrac- are strongly recommended.torandinstallertobetheindustryIdescribedthekeyelementsof expert that understands everything ItheANSIstandardsthatpertainto have described above. The installingthis discussion of your questions. In addition, there are several other key areas you can use to inform yourself and communicate to other about this subject. They include: 2018/2019NTCAReference Manual section on Critical Lighting EffectsonTileInstallationson pages 125 - 132. 2018/2019NTCAReference Manual section on Lippage Control The NTCA Reference Manual containsDevicesandEdgeandLippage valuable information about wall lightingMechanicalTuningDeviceson and lippage control devices. page 172.32TileLetter | May 2019'