b'A&D CORNERwithtemperatureandhumidity variations.To accommodate this expansion andcontractionactivity,theuse of expansion joints per the TCNA HandbookforCeramic,Glass and Stone Tile Installation method UltracolorPlusFAwithEJ171isessentialandrequired DropEffectinalltilework. Asstatedinthe Handbook,Thedesignprofes-technologyissional or engineer shall show the afast-setting,specificlocationsanddetailsof non-shrinkingmovement joints on project draw-groutwithings.Becertainthatallparties fineaggre- involved in the project including gate for grout- thearchitect,thespecifier,the ingtileandstonejointwidthsdesigner, the salesperson and the tile installer know and understand from 1/16 to 3/4 (1,5 to 19the critical use and placement of mm). The ne aggregate formula- expansion joints.tion makes Ultracolor Plus FA an3. Work only with premium mate-all-in-onegroutreplacementforrials to install tilesandedandunsandedgrouts.Theuseofpremiumquality DropEffecttechnologyreducesbondingmaterialsismoneywell surfaceabsorptiontohelprepelspent.Merriam-Websterdefinespre-water,dirtandgrimefrompen- mium as: of exceptional quality etratinggroutjoints.Ultracoloror amount; also, higher priced. PlusFAisformulatedwith10%Exceptionalqualitycomesata recycledcontentandmeetstheprice.Thecomponentsthatare addedtothesematerialsprovide ANSIA138.1specicationforenhancedcharacteristicsthat Green Squared certication. Itsaffectbothfunctionanddurabil-easy to install, stain-resistant andity. For instance, saving a couple ofpenniespersquarefootona color-consistent,withnoefores- conventionalandless-expensive cenceandnosealerrequired.thin-setmortarratherthanusing www.mapei.com afeature-laden,large-and-heavy-tile mortar is a foolish idea.82TileLetter | April 2019'