SECTION035400
FormattedSpecificationfor
ENDURIT LEVELEX 150SELF-LEVELINGUNDERLAYMENTCONCRETE
PARTI–GENERAL
1.01SUMMARY
A.ThisistherecommendedspecificationforLEVELEX 150Self-LevelingCalcium Aluminate
Cement Based Underlaymentforuseoverspecifiedinterioronly substrates.
B.CompleteinstallationdetailsareprovidedintheENDURIT LEVELEX 150 Technical Data Sheetavailableat
1.02SECTIONINCLUDES
A.LEVELEX 150Self-LevelingUnderlaymentConcrete
B.LEVELEX-Primer
C ENDURIT MVCMoistureVapor ControlSystems
1.03QUALITYASSURANCE
A.InstallationofENDURIT LEVELEX 150mustbebyatrainedapplicator,with at least five (5) years of installation experience.
B.Underlaymentshallbeabletobeinstalledfrom1/8"to11/2”inonepour.Itmayalsobe featheredtomatchexistingelevations.
C.Underlaymenttobeappliedtoaminimumthicknessof1/8”overhighestpointinthe
subfloor,withan averagetypical thicknessof1/4”.
D.Underlaymentcompressivestrengthshallbe5500psiafter28daysperASTMC109/mod
(air cureonly).
E.Underlaymentshallbewalkableafter2hoursandallowfloorcoveringtobeinstalledafter
24 hours at 75°F.
F.Manufacturer'scertificationthattheproductiscalcium aluminate cement based.
1.04DELIVERY,STORAGEANDHANDLING
A.Deliver materialsintheirunopenedpackagesandprotectfromextremetemperaturesand
moisture.Protectliquidsfrom freezing.
1.05SITECONDITIONS
- LEVELEX 150isacementitiousmaterial.Observethebasicrulesofconcretework.Donotinstallbelow50°For above 95°F surfacetemperature.
PART2–PRODUCTS
2.01MATERIALS
A.Thecalcium aluminate cement-basedself-levelingunderlaymentshallbeLEVELEX 150Self-Leveling Calcium AluminateCement Based Underlayment.
B.PrimerforstandardabsorbentconcreteshallbeLEVELEX-Primer A or B.
C.Watershallbeclean,potable,andsufficientlycool(notwarmerthan70°F).
H.Moisturevaporsuppression:BESSERNrecommendstheuseofamoisturecontrolsystemoverexistingconcretewherethelevelofmoistureemissionsfromtheslabexceedsthemaximumpermittedbythemanufacturerofthefinishedcoatingorsealerastestedinaccordancewithRelativeHumidityMethod(ASTMF2170) or Calcium Chloride Method (ASTM F1869).Ifmoistureproblemsexist,BESSERNrecommendstheVapor ControlSystem (ENDURIT MVC-8, MVC-2 or MVC2LT).Forcompleteinstallationinstructions,pleaserefertotheappropriateENDURIT MVCMoisture Vapor ControlTechnical Data Sheet.
2.02MIXDESIGN
A.Standardmixingratio:MixeachbagofLEVELEX 150(50lb.)with5.5quartsofwater.ProductshallbemixedinanMixingDrumusingaMixingPaddleanda1/2"heavy-dutydrill(min.650rpm).Mixthoroughlyforapproximately2-3minutestoobtainalump-freemixture.
Followwritteninstructionsperthe LEVELEX 150baglabel.
B.ENDURIT LEVELEX 150can be mixed and applied using an AutomaticMixingPump.Consult the pump manufacturer’suser’s guide to determine the proper settings.
DONOTOVERWATER!Checktheconsistencyoftheproductonthefloortoensureauniformdistributionofthesandaggregateatboththetopsurfaceandbottomofthepour.
PART3–EXECUTION
3.01PREPARATION
A.Allsubfloors mustbesound,solid,cleaned,andprimed:
1.Allconcretesubfloorsmustbeofadequatestrength,clean,andfreeofalloil,grease,
dirt,curingcompoundsandanysubstancethatmightactasabondbreakerbefore
priming.Mechanicallycleanifnecessaryusingshotblastingorother.Acidetching
andtheuseofsweepingcompoundsandsolventsarenotacceptable.
2.Woodsubfloors mustbecleanandfreeofallforeignmatter.Sandtobarewoodthen
vacuumtoremovealldust.Re-nailanylooseboardsexhibitingmovement.
3.Metalsubfloorsmustbecleanandfreeofallrustandforeignmatter.Where
required,acorrosiveresistantcoatingshouldbeappliedandallowedtodrybefore
priming.
4.Cutbackandothernon-watersolubleadhesiveresiduesmustbewetscrapedtoa
thin,well-bondedlayer.
5.Non-poroussubfloorssuchasceramicandquarrytileaswellasterrazzoshouldbe
cleanandfreeofallwaxesandsealers.Ifnecessary,havethesurface
professionallycleaned.
6.Allcracksinthesubfloorshallberepairedtominimizetelegraphingthroughthe
underlayment.
7.Substratesshallbeinspectedandcorrectedformoistureoranyotherconditionsthat
couldaffecttheperformanceoftheunderlaymentorthefinishedfloorcovering.
BESSERNrecommendstheuseofanENDURIT MoistureVapor ControlSystem(ENDURIT MVC-8, MVC-2, MVC-2LT).Forcompleteinstallationinstructions,pleaserefertotheappropriateENDURIT MVC MoistureVapor ControlTechnicalData Sheet.
B.JOINTPREPARATION
1.MovingJoints–honorallexpansionandisolationjointsupthroughtheunderlayment
orENDURIT MoistureVapor ControlSystem.
2.SawCutsandControlJoints–fillallnon-movingjointswithENDURIT Quick-Fix 100 asrequired. Refer to the ENDURIT Quick-Fix 100 Technical Data Sheet for more detailed information.
3.WhenusinganENDURIT MVCMoistureVapor ControlSystem,followinstructionsprovidedintheENDURIT MCVMoistureVapor ControlTechnicalData SheetforthetreatmentofSawCuts,ControlJointsandCracks.
C.PRIMING
1.Primerforconcretesubfloors:Use LEVELEX-Primer A or B (consult LEVELEX Primer Technical Data Sheets for detailed application instructions).
Applyevenlywitha short-nap roller the use of a broom or mop may be used to help disperse material.Donotleaveanybarespots.Removeallpuddlesandexcessprimer.Allowtodrytoaclear,thinfilm(min.1hour,max.24hours).Underlaymentshallnotbeapplieduntiltheprimerisdry.Primercoverageis
approximately400 to500sq. ft.pergallon.
3.02APPLICATIONOFUNDERLAYMENT
A.INSTALLATION
1.PourorpumptheliquidENDURIT LEVELEX 150andspreadsmooth inplacewitha gauge rake and spiked roller.Wear spikedshoestoavoidleavingmarksintheliquidLEVELEX 150.Underlaymentcanbewalkedonin2hoursat75°F.
3.03PREPARATIONFORFLOORINGINSTALLATION
A.Underlaymentcanacceptfinishfloorcoveringmaterials,toincludeCarpet,after24hours
at 75°F and 50% relative humidity.
B.Duetothewiderangeofadhesivesthatareusedtoinstallfloorcoverings,some
adhesivesmaydrymorequicklyoverLEVELEXunderlaymentsthanoverothersubstrates.It is recommended that a test installation be performed to determine conditions.
3.04FIELDQUALITYCONTROL
A.Wherespecified,fieldsamplingoftheLEVELEX 150 underlaymentistobedonebytakinganentireunopenedbagoftheproductbeinginstalledtoanindependenttestingfacilitytoperformcompressivestrengthtestinginaccordancewithASTMC109/modified:air-cureonly.Therearenoinsitu testprocedures fortheevaluationof compressivestrength.
3.05PROTECTION
A.Priortotheinstallationofthefinishflooring,thesurfaceoftheunderlaymentshouldbe
protectedfromabusebyothertradesbytheuseofplywood,Masoniteorothersuitable
protectioncourse.
ENDOFSECTION