TECHNICALCLARIFICATIONWallTilingPreparationforExecutionMaterialsPreparationEquipmentsPreparationRequirementsforExecutionTheProcedureofFixingWallTilesNo.425ordinaryportlandcementshallbeusedinexecutionwithoutmixinganycementofothertypesand/orgrades.Othermaterialsincludemediummortar(whosesiltcontentshallbelimitedwithin3%),adhesiveandthewalltiles.Thedimensionofthewalltilesinshowercubeandbathroomshallbe300mminbothlengthandwidth,whilethoseappliedinpowderroomshallbe600mminlengthand300mminwidth.Cutter,rubber-headedhammer,spade,wateringcan,flatteningbar,jaggedtrowel,wirebrush,plumbline,threadplate,guidingrule,strings,brushandotherequipmentsrequiredfortheexecutionshallbeprepared.Thewallingoftheblocksshallbecompletedandtheworkofplasteringfinished.Alltheby-framesofthedoorintheroomhavebeeninstalled.Theinstallationoftheutilitypipingsystemhasbeenfinishedandpreformedholesprovided.Horizontallineswhichhaveaperpendiculardistanceof1000mmfromthegroundhavebeendrawnoutanddoublecheckandadjust(ifnecessary)finished.Tilesshallbemadetidyandchippedonespickedoutpriortothecommencementoftiling.Thefixofthewalltilesshallbeinaccordancewiththefollowingprocedure:Treatingbase-layerPlumbingandmeasuringMakingmarkersPlasteringthebaselayerSettingoutcontrollineTilingAdjustingPointingTreatingbase-layerPlumbingandmeasuringPlasteringthebaselayerSettingout2.5Tiling2.6Adjustment&maintenancePointingCleanthewallinthefirstplace,andthenusetheconcretemortarmixedwithadhesivetobrushthewalltothepointthatthebasesurfaceiscoveredcompletelyandallthecementburrsaremadeneatlyandconsistent.Thecuringofconcreteshallbecarriedoutafterthefinalsettingandshallbeabandonedifandwhenalltheknotsofconcretemortartightlyclingtotheconcretesurface.Flattenthesurfaceofthewallanduseaplumblineformakingtheverticality.Thehorizontallinessetoutonthewallshallbemeasuredaccordingtotheground,andtheverticallinescontrolledbythecornersofthewall.Markersshallberegardedasreferencepointswhenscreedingsoastoensurethebaseplasterisregularandbalanced.Theworkshallbeexercisedintwosteps.First,thecementpasteshallbeappliedonthewall,followedimmediatelybyemployingcementmortar(whoseproportionshallbe1:3)andthenuseatroweltocompactthosematerials.Inthesecondplace,employmorecementmortar(whoseproportionshallbethesame)onthebasetomeetthethicknessofthemarkersandthenflattenthesurfacebyusingaflatteningbar.Makingthesurfacejaggedandcuringshallbeappliedthenextday.SettingoutshallbecarriedoutinaccordancewiththeShopDrawingsapprovedbyAPG,andthegapbetweenthetwotilesshallbe2mm.Thegapsbetweenthetilesonthewallshallbealignedwiththatoftheground.No.325adhesiveshallbeusedwhenexecutingtheworkandthethicknessofwhichshallnotbeexceeded5mm.Theexternalangleshallbe45°.Re-examinationshallbeconductedonthefinishedtiling,especiallymosaics.Adjustmentandrepairshallbeexercisedwheneverandwhereverdefectsappear.Pointingshallbecarriedout48hoursaftertilingisfinished.Priortothecommencementofthiswork,thewastemortarinthegapsshallbecleaned.Approvedpointingmaterialshallbeappliedthereafter.Thewastesshallbecleanedoffthetilesandmosaicsbyusingclothsand/orcottonafterthepointingmaterialisdriedtotheextentthatitcanstandsuchkindofworks.Curing3.Standardofdelivery4.StandardofqualityCuringshallbeexercisedwheneverandwhereverthesituationrequires.Thejointsofthegapsmustbeeven;theedgesstraightandsmooth;thesurfaceofthetilesfreeofanydefects.Andthequalitymustmeettherequirementsofthespecification.Thecohesionofthesurfaceandthebase-layermustbetightandfirmwithoutanydetaches.Thebase-layermustbecleanedthoroughlyandwettedevenly.Thetilesmustbecleanandtidyandfreeof