Installation Guide
INFINITY TECHNICAL GUIDE
Info@FortressDeck.com
www.FortressDeck.com
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11. INSTALLATION
Important! Please make sure that before you begin construction, you consult building requirements, codes and restrictions regarding
spacing and load requirements for rails. All supporting structures and framing must comply with applicable building codes. All local
building codes will supercede any recommendations, measurements or techniques in the following installation instructions.
If you have any questions or uncertainties, please contact Fortress Deck before beginning installation.
●Makesureyoupre-drillslightlysmallerholesthanthescrewshaftdiameterfortrimscrewsandensureallscrewsaresecure,but
notovertightenedduringinstallation.Thiswillhelppreventpressurecracksandmushrooming.
●Innityprolescontainplasticandwillexpandandcontractmoresothanwood.Theexpansionandcontractionoftheseproles
mustbeconsideredwheninstalling.Sucientexpansiongapsmustbeleftatbuttjointsaswellaswheretheprolesmeetxed
objects.Considertemperaturesattimeofinstallationforcontraction/expansionpurposes.TherateofexpansionofInnityprolesis
calculatedat0.025”or1/40”perfoot(¼”-⅜”onbothsidesofa20’board)overa50°Fswingintemperature.
●EnsureInnityhasacclimatedtotheenvironmentbeforeinstalling.Itisimportanttounderstandthatwheninstallingincolder
weatherthatthecompositeboardswillexpandmorethanwheninstallinginhotterweatherandgappingshouldbeadjusted
accordingly.
●Avoidpre-cuttingInnity
boards,asnoteveryconstructionwallisstraightandcutallFortressInnityproductsslowlyusingasharp
netoothbladetoavoidchipping.
●Therstboardiskeyinthelayingprocess!Ifitisaxeddeck,placetherstplankushwiththerimjoist-makesureitissquareor
parallelwiththeexistingstructureorwithyourframe.
●Makesureyourstartingproleissquareontheframeandlaidperfectlystraight,asallsubsequentplankswillfollowitsline.Make
sureofthisbymeasuringedgesanddiagonals.
●Surfacemounttheboardtotherimjoistwiththepreferredoverhang.Dependingonthedesign,youcanhaveabiggeroverhang,
butrememberyoucannoteveroverhangbymorethan2”.Aesthetically,itoftenlooksbetterwhenyouoverhangabout¼”-½”overthe
fascia.
●HULKHiddenClipcanbeusedwhenyouendushwiththeframeandthereisnooverhang.
●FortressInnityPostSleevesandModernRailsaremanufacturedforon-centerpostspacingtoaccommodate6’and8’rail
sections.ModernRailsaredesignedinslightlylongerspanstoaccountforslightvariationinpostplacementandcutendsduring
angledrailapplications.NOTE: IT IS IMPORTANT TO MEASURE POST SPACING PRIOR TO MAKING ANY CUTS.
11.1 Expansion Table
20footboardwithexpansionof0.025(1/40”)perfoot)
20’boardexplanation=½”-¾”
¼”-⅜”oneachside
¼”-⅜”gap ¼”-⅜”gap