Installation Guide

11/11/2016
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4/13
3/4″particleboard(minimum40lb.density)
GlueDownInstallationsOnly
Concreteslabs
Acousticconcrete
Ceramic,terrazzo,slateandmarble
Metal
Cork
Minimum3/8″approvedunderlaymentinstalledoverexistingsolidhardwoodflooring
C oncrete(GlueDownInstallationsOnly)
5/16″solidhardwoodflooringcanbeglueddirectlytoongradeconcretewithaminimumcompressive
strengthof3000
PSI.Donotinstalloveraconcretesealerorpaintedconcrete.Ifpresent,removebygrindingorsanding.
Donotinstall
overslick,heavilytroweledorburnishedconcrete.Roughenthesurfaceasnecessarybysandingor
grinding.Usean
appropriateNIOSHdesignateddustmask.
C oncreteMoistureTests
N OTE:Testseveralareas,especiallynearexteriorwallsandwallscontainingplumbing.Allconcrete
subfloorsshouldbetested,andresultsdocumented,formoisturecontent.Visualchecksmaynotbe
reliable.Acceptabletestmethodsforsubfloormoisturecontentinclude:
A3%PhenolphthaleininAnhydrousAlcoholSolution:Chiptheconcreteatleast1/4″(6mm)
deep(donotapplydirectlytotheconcretesurface)andapplyseveraldropsofthesolutionto
thechippedarea.Ifanycolorchangeoccurs,furthertestingisrequired.
TramexConcreteMoistureEncounterMeter(Figure3):Moisturereadingsshouldnotexceed
4.5ontheupperscale.(Figure3showsanunacceptablereadingofover4.5)Polyfilm
Test:Apply3′×3′(1mx1m)piecesofpolyethylenefilmtothesubfloorandleaveinplacefor24
hours.Assurealledgesarecompletelysealedwithwaterresistanttape.Darkenedconcreteor
condensationonfilmindicatespresenceofmoistureandrequiresadditionalmeasurements
withtheTramexMeter,CalciumChlorideorRhtest.
N OTE:Thefollowingtestsarerequiredincommercialapplications.Eitherorbothtestsareacceptable.
CalciumChlorideTest(ASTMF1869):Themaximummoisturetransfermustnotexceed3
lbs./1000ft.2in24hrs.withthistest.
RHLevelsinConcreteUsingInsituProbes(ASTMF217002)shouldnotexceed75%.
“DRY”CONCRETE,ASDEFINEDBYTHESETESTSCANBEWETATOTHERTIMESOFTHEYEAR.
THESETESTSDONOTGUARANTEEADRYSLAB.ALLCONCRETESLABSSHOULDHAVEA
MINIMUMOF10MILPOLYFILMMOISTUREBARRIERBETWEENTHEGROUNDANDTHE
CONCRETE.
MoistureRetardantSystems
Ifexcessivemoistureispresentoranticipated,useArmstrongVapArrest™S135ProfessionalMoisture
Retardant
Systemorinexpensivesheetvinyltoreducevaporintrusion.
N OTE:WhenusingArmstrongVapArrestS135ProfessionalMoistureRetardantSystemorsheetvinylas
amoisture
retardant,USEONLYArmstrongEqualizer™urethaneadhesive.
ArmstrongVapArrestS135:Applythematerialsafterallsubfloorpreparationiscomplete.
FollowtheinstructionsontheVapArrestS135label.Allow824hourscuringtimebefore
applicationofthehardwoodflooring.