Installation GuideCement Board
Lightest Cement Board
Easiest to Cut and Fasten
20% Faster Installation
1/2" and 5/8"Outstanding base for floors, walls, ceilings and countertops
1/4"Floors and countertops only (1/4" Durock® cement board is not for walls or ceilings)
Lighter. Easier. Faster.
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
Formorethan25years,Durockcementboardhassetthestandardfor provenperformanceinthebackerboardcategory.Nowthisgreatproduct isevenbetter.ThenextgenerationofDurockcementboardnotonly continuesthebrand’straditionofqualityandreliability,butnowinstallsup to20%faster—andthatprovidesabigboosttoyourproductivity. Otherbenefitsinclude:
–Lightestcementboardforeasierhandling–Easiesttocutandfasten–30-yearwarranty
Waterdurableandmoldresistant,withbettertilebondthanfiber-cement boardsorbareplywood,Durockisanoutstandingbackerboardforawide varietyofmaterials.Choosethishighperformancealternativetofiber-cement boardsorbareplywoodsurfacesfor:
Superior Tile Bond Preventstilepopsandgroutcracks,upto40%greatertile bondthanfiber-cementboard.
The Strength of Portland Cement Willnotswell,soften,rot,warp,delaminateor disintegrateifexposedtowater.Noncombustible.Backedbya30-year limitedwarranty.
Superior Mold Resistance NomoldgrowthastestedperASTMG21.
Discover the Next Generation of Durock® Brand Cement Board
2
What You’ll Need
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
Requirements
Floors 1/4", 1/2", 5/8" thickness–Subfloorshouldbeminimum5/8" exterior-gradeOSBorplywood.
Countertops 1/4", 1/2", 5/8" thickness–Minimum3/4"exterior-grade plywoodbase.–CoverbasewithDurock™brand tilemembrane,15lb.feltor4-mil polyethyleneandattachwith1/4" galvanizedstaples.
Walls and Ceilings 1/2" and 5/8" thickness only–Maximumstudspacing:16"o.c. Maximumallowabledeflection, basedonstudpropertiesonly, L/360.Maximumfastener spacing:8"o.c.forwoodand steelframing;6"o.c.forceiling applications.
Waterproofing Ifwaterproofingisdesired,use Durocktilemembrane.SeeUSG literaturepieceCB492for Durock tilemembraneproduct information.
Cutting Durockpanelsshouldbecutto sizewithaknifeandstraightedge. Apowersawshouldbeused onlyifitisequippedwithadust collectiondevice.Alwaysweara NIOSH/MSHAapprovedmaskand eyeprotectionwhencutting Durockpanels.–Utilityknife:Usingastraight edge,scorepanelfacewith utilityknifeandcutthrough glass-fiberreinforcingmesh, thensnapandcutbacksidemesh tobreakcleanly.Usearaspto smoothanyroughedges.
–Powersaw:Usealow-RPM portablesawwith3-1/2" carbide-tippedblade.Tomake cutoutsforpipesandfixtures, useutilityknifetocutthrough meshonbothsidesofpaneland punchoutwithahammerfrom backside.Or,useanelectricdrill withahole-sawbit.
WARNING:Dustcancontainsilica. Prolongedbreathingcancause lungdamageandcancer.See MSDSformoreinformation.
3
........................................................................................................................................................................................................................................................................................................................................................................................................
Positioning Fitendsandedgesofpanels closelybutnotforcedtogether, maintaining1/4"spacebetween panelsandperimeterwalls. Staggerjointsaminimum16" sothatfourcornersnevermeet. Offsetpaneljointsaminimum8" fromsubfloorjoints.
Leveling Bed Applytype1organicadhesivewith 5/32"v-notchedtrowel,latex- fortifiedmortarwith1/4" square-notchedtrowel.Combout adhesiveormortarinstraight, parallelrows(asshownbelow) andimmediatelycoverwithpanel. Adherepanelstosubfloor,one panelatatime.
Fastening Securepanelswhileadhesiveis stillwet.Spacefasteners8"o.c. aroundtheperimeterandinthe fieldoftheboard.
Woodframingandcountertops: fastenwith1-1/2"11-gaugehot- dippedgalvanizedroofingnails, orDurock™brandtilebacker screwsforwoodframingor 1-1/4"Durock tilebackerscrews forwoodframingorequivalent.
Joining Filljointswithlatex-fortified mortarorType1organicadhesive andimmediatelyembedalkali- resistant,fiberglassmesh jointtape.
Finishing Tileoralmostanyflooring material.*
* Notforusewithvinylflooring.
Floor Installation1/4", 1/2", 5/8"
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
4
........................................................................................................................................................................................................................................................................................................................................................................................................
Countertop Installation1/4", 1/2", 5/8"
Wall and CeilingInstallation1/2" & 5/8" only
–CoverplywoodbasewithDurock
tilemembrane,15lb.feltor4mil polyethyleneandattachwith1/4" galvanizedstaple.
Position Fitendsandedgesofpanels closelybutnotforcedtogether. Staggerpaneljointsfromplywood basejoints.
Fasten Spacefasteners8"o.c.around theperimeterandinthefieldof theboard.
Joining Filljointswithlatex-fortified mortarorType1organicadhesive andimmediatelyembedalkali- resistant,fiberglassmeshjoint tape.
Finish Installtile.
Note: Becausecementboardfasteners mayprotrudethroughtheplywood basewhen1/4"cementboardis used,1/2"or5/8”cementboard ispreferredinthisapplication.
Fastening Fastentostudsspaced16"o.c. Spacefasteners8"o.c.forwalls, 6"o.c.forceilings.Fitendsand edgesofpanelscloselybutnot forcedtogether.–Woodframing:1-1/2"hot-dipped galvanizedroofingnailsor1-1/4" Durocktilebackerscrewsfor woodframingorequivalent.–Steelframing:1-1/4"Durock™
brandtilebackerscrewsforsteel framingorequivalent.
Joining Filljointswithlatex-fortified mortarorType1organicadhesive andimmediatelyembedalkali- resistant,fiberglassmeshjoint tape.
Shim Placea1/4"spacerstriporshim aroundlipofbathtuborshower pantoholdbottomedgeofpanel offthefixture.
Finish Installtile.
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
5
Wheretilewillnotcoverentirewall surface,suchasabovetuband showersurrounds,determine whereyouwantthetiletoendand drawalevellineatthisheight.Be suretoallowforheightoftilecap, ifapplicable.
Onwallswheretilewillreachthe floor,determinewhetherflooris levelbymeasuringdistanceto desiredtileheightonbothsidesof areatobetiled.Ifthereisadiffer- ence(e.g.,thefloorisloweronone side),layoneverticalrowoftile fromhighestpointdowntofloor. Affixtileswithdabsofmastic.
Usethisfirstrowasaguideto keeptilesandgroutlinesleveland ensurealignmentwithtilesof adjacenttuborshowersurround. Ifnewflooringwillbeinstalled, leaveasufficientgapbetween lowesttileandsubfloor.
Onbathroomfloors,startby placingfulltilesinfrontofbathtub orshowerandalongtheadjoining walltoavoidcuttilesinthishighly visiblearea.
Planning YourTile Installation1/2" & 5/8" only
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
6
........................................................................................................................................................................................................................................................................................................................................................................................................
Installing Ceramic Tile
Applylatex-fortifiedmortaror Type1organicadhesivewitha notchedtrowel.Holdtrowelat anangletomaintainuniform thickness.Refertosettingmaterial manufacturerforspecific informationrelatedtotroweltype andsize.
Workingasmallareaatatime, presstileintoplacewithaslight twistingmotiontoseatproperly. Preventadhesivebuildupon tileedgeandingroutspace. Ifadhesivesqueezesfromunder tile,removeexcessbeforeitdries.
Keeptilesandjointsstraight anduniform.Usetilespacers ifdesired.
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
........................................................................................................................................................................................................................................................................................................................................................................................................
7
ManufacturedbyUnitedStatesGypsumCompany550WestAdamsStreetChicago,IL60661
TrademarksThefollowingtrademarksusedhereinareownedbyUnitedStatesGypsumCompany:Durock,USG,USGinstylizedletters.
NoteProductsdescribedheremaynotbeavailableinallgeographicmarkets.ConsultyourUnitedStatesGypsumCompanysalesofficeorrepresentativeforinformation.
NoticeWeshallnotbeliableforincidentalandconsequentialdamages,directlyorindirectlysustained,norforanylosscausedbyapplicationofthesegoodsnotinaccordancewithcurrentprintedinstructionsorforotherthantheintendeduse.Ourliabilityisexpresslylimitedtoreplacementofdefectivegoods.Anyclaimshallbedeemedwaivedunlessmadeinwritingtouswithinthirty(30)daysfromdateitwasorreasonablyshouldhavebeendiscovered.
Safety First!Followgoodsafety/industrialhygienepracticesduringinstallation.Wearappropriatepersonalprotectiveequipment.ReadMSDSandliteraturebeforespecificationandinstallation.
WARNING!Dustcancontainsilica.Prolongedandrepeatedbreathingofsilicadustcancauselungdamageandcancer.Ifcuttingwithapowertool,useawetorvacuumsawtoreducetheamountofdustgenerated.Dustcanbecorrosivetoeyes,skin,andrespiratorytract.Contactcancauseseverechemicalburns.Weareye,skinandrespiratoryprotection.Ifeyecontactoccurs,flushimmediatelywithwaterfor30minutes.Ifingested,callphysician.Productsafetyinformation:800-507-8899orusg.comCustomerService:800USG-4-YOU(800874-4968).
For warranty or productinformation and literature:800USG.4YOU(874-4968)
usg.com
CB237EN/rev.11-11©2011UnitedStatesGypsumCompanyPrintedinU.S.A.