Technical Specifications

General Instructions
For Roof Decks (Rakes and Eaves):
Tobegin,removeanydust,dirt,loosenails,orotherprotrusionsfromtheroofdeck.Removeallshingles,roongfelt,andnails
fromthedeckofexistingroofs.ApplyWeatherMaster
®
Ice&Water100,200or216underlaymentonlyinfairweatherwhenair
surfacetemperaturesareabove45°Fandrising.Applytodrysurfacesonly.Applysheetparalleltotheroofedge,extendingover
1/4”.Overlapedgeseams3”,sothatlapswillshedwater.Endseamsshouldbeoverlapped6”andstaggered.Onsteep-slope
applicationsitmaybenecessarytospotnailthetopedgeofthemembranetemporarilyduringtheinstallationprocess.For
wrinkle-freeapplication,cutWeatherMaster
®
Ice&Waterunderlaymentinto10-to15-footlengthsandrerollinreversedirection.
Peelback1to2feetofreleasepaper.Alignthesheetontheloweredgeoftheroofandadheretherst1to2feet.Pulltherelease
paperfromunderthesheetandcontinuetopeelitwhilepressingthesheetintoplace.Rollloweredgesrmlywithawallpaper
rollerorotherhandroller.Foricedamprotection,WeatherMaster
®
Ice&Waterunderlaymentmustbeappliedtoreachapoint
abovethehighestexpectedleveloficedams(minimumapplicationatleasttoaheightof24”beyondtheinteriorwallline).End
lapsshouldbeoverlapped6”andstaggered.Wheninstallingattemperaturesbelow45°Fandonslopesabove8in12—facenail
intheoverlapareaatthetopofthesheetat12”O.C.Primingthedeckmaybenecessarybelow45°F.
For Valleys and Ridges: 
CutWeatherMaster
®
Ice&Waterunderlaymentinto4-to6-footlengths.Peelthereleasepaperandcentersheetovervalleyor
ridge.Drapeandpresssheetintoplace,workingfromthecenterofthevalleyorridgeineachdirection.Forvalleys,applythesheet
startingatthelowestpointandworkupward.WeatherMaster
®
Ice&Waterunderlaymentshouldnotbeleftpermanentlyexposed
totheweather.Itmustbecoveredbyshingles,metalvalleyashing,orotherroongmaterialswithin45days.Overlaphorizontal
overlapsatleast6”invalleys.Smooth-shankgalvanizednailsarerecommendedforfasteningshingles.Donotoverdrivenailsor
breakthesurface.
Safety, Storage and Handling
PalletsofWeatherMaster®Ice&Watershould
notbedoublestacked.Provideaweathercover
ontopandsidestoallowforproperventilation.
ConsulttheMaterialSafetyDataSheetforbest
availableinformationonsafehandling,storage,
personalprotection,health,andenvironmental
considerations.
Caution
Learnandobservesaferoongpracticesaccordingto
OSHAandlocalbuildingcoderequirements.Always
usecautionwhenwalkingonslopedroofdecksand
WeatherMaster®Ice&Waterunderlayment.Donotwalkon
unsecuredunderlaymentoranyotherlooseroongmaterial
lyingonslopedroofdecks.Dust,dew,water,ordebriscreate
unsafeconditionsontheroof.Thepresenceofanyforeign
mattermaydrasticallychangethecoecientoffriction(traction)
onWeatherMaster®Ice&Wateroranyothermaterialonasloped
roofdeck.Failuretousepropersafetyequipmentandfootwear
canresultinseriousinjuryorevendeath.
WeatherMaster
®
Ice & Water Field Application
Drip edge over
WeatherMaster® Ice & Water
100, 200, or 216
at rake edge
Code-approved
deck material
3" overlap
Drip edge under
WeatherMaster® Ice & Water
100, 200, or 216 at eave edge
Nails 12" O.C. at eave
edge on wood deck
Flashing membrane
overhangs drip edge
at eaves 1/4" to 3/4"
Wall line
WeatherMaster® Ice & Water
100, 200, or 216 applied to a
point at least 24" beyond
interior wall line
© Copyright 2016, Atlas Roong Corporation ATL-163626-00 10/16
AtlasRoofing.com
Ardmore, OK
Tel: [phone]
Daingereld, TX
Tel: [phone]
Franklin, OH
Tel: [phone]
Hampton, GA
Tel: [phone]
Meridian, MS
Tel: [phone]
Sales Oices
Corporate Sales & Marketing
2000 RiverEdge Parkway, Suite 800
Atlanta, Georgia 30328
Atlasoershomeownersincreasedcoverageoftheir
PremiumProtectionPeriodonanyAtlasSignatureSelect
®

RoongSystem.Thisproductqualiesforuseinthe
AtlasSignatureSelect
®
RoongSystemwhenusedin
combinationwithotherqualifyingAtlasproducts.For
moreinformation,pleasevisit:
AtlasRoong.com/Pro.