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1311 Insulation <br />1371.1 InsWlWtion Requirnments: All insulation materials <br />shall be installed accordirg to the manufadurer's instructions <br />to achieve proper densdies, maintain clearances, and maintain <br />undorm R-values. To the mazmum extent possible, insulation <br />shall e�ctend over the full component area to the intended R- <br />value. <br />7317.2 RooflCeiling Insulation: Open-bbwn or poured loose- <br />fill insuiation may be used in attic spaces where the slope d <br />the ceiling 5 not more than 3/12 and there is at least thirty <br />inches of clear distance from the top of the bottan chad of the <br />lruss or ceiling jdst to the underside of the sheathirg at the <br />roof ridge. When eave vents are ireta!led, baf9irg of the vent <br />openings shall be pnvided so as to de� lect the incoming air <br />above the surtace cf the insulation. <br />Where lighting fixtures are recess� irrio a suspended or <br />exposed grid ceiling, the roof/ceiling assembly shall be <br />insulated in a lowGon other than directly on the suspertled <br />ceiling. <br />Exception: Type �C rated recessed hgMing 5xtures. <br />Where installed in wood framing, faced batl insulation <br />shall be face staoled. <br />1371.3 Wall Insulafion: Extenor wall cavities isolated during <br />framing shall be fully insulated to the levds of the surtounding <br />wa�s. When installed in wood traming, faced batl insulation <br />shall be face stapled. <br />Above grede extenor insulation sh�l be protected. <br />1311.4FIoorinsulation: Floorinsulationsha�lbeinstalledin <br />a permanent manner in substaMial contact with ihe suAace <br />being ireulated. Insulation supporis shall be installed so <br />spacing is not more than twenty4our inches on center. <br />Instatled insulation shall not block the aiAlowthrough <br />toundation vents. <br />13I1,551ab•On•GradeFloor: Slalron-gradeinsulation <br />installed inside the foundation wall shall extend dowmvard from <br />the top of the slab a minimum distance of �venry-fov mches a <br />to the top of the fooling, whichever is less. Insulation installed <br />outside the foundation shall exlend downward a minimum d <br />twenty-four inches or to Ihe fmstline, whichever is greater. <br />Above grade insulation shall be protected. <br />Ezception: Fa monolithic slabs, the insulation shall <br />extend dowmvard (rom Uie top of the slab tothe <br />6oriom of the fooling. <br />131 t.6 Radi�n[ Floors (on or below grade): Slatrorngrade <br />insulation shall extend dowrnvard (rom ihe top ot the slab a <br />minimum distance of thirty-six inches or dowrnvard to the top d <br />ihe footing and horizontal for an aggregate o( not less than <br />thirty-six inches. <br />If required b�� tlm build�ng offcial where soil conditions <br />wanant such msulation, ihe entire area of a radiant Boor shall <br />be thermally isolaled from the sdl. Where a soil gas control <br />syslan is provided below the radiant fbor, which results in <br />inereased conveclive flav bdow the radiant floor, the radiant <br />Ooor shall be thertnally isolated from the sutrflow gravel layer. <br />1372 Glaang and Doors <br />1J12.1 Standard Procedure for Determination of Glazing <br />and Door U•Factors: U-factors'orglazing and doors shall be <br />determincd, certdied and labeled in aanrdance wdh Slandard <br />RS-31 by a certifed independent agency licensed by the <br />IJational Fenesiration Rffiing Candl (NFRC). Compliance <br />shall be based en the Residen6al or the Nonresidential Model <br />Size <br />ProtlUGI sanples usE� ror u-tactor tletertninations shall be <br />production lire units or representatNe of unAs as purchased by <br />the consumer or contractor. Unlabeled daang and dows shall <br />be assigned the default U-factor in Sxtion 20�6. <br />1312.2 Solar Heat Gain Cce�cient and Shading <br />Ccefficient Solar Heat Gain Ccefficient (SHGC), shall be <br />determined, certified and labeled in accordance with lhe <br />National Fenectration Rating Cwndl (NFRC) Standard by a <br />certified, independent agency, licensed by the NFRC. <br />Ezception: Shading coeffideMs (SC) shall be an <br />acceptade alternate for canpliance with solar heat <br />gain wefident requirements. Shading coeffiaeMs <br />for glazing shall be taken fran Chapter 27 of <br />Standard RS-27 w from the mawfadurer's test data. <br />7313 Moisture Control <br />1313.7 Vapor Retarders: Vapor reWrders shal� be installed on <br />Ihe wartn side(in winter) of insulalion as required by this <br />section. <br />ExcepBon: Vapor retarder insta0ed with not mae <br />than 1l3 d the nominal R-value between d and the <br />conditioned space. <br />1313.2 RooflCeilingAssemblies: Roof/ceiling assemblies <br />where the venlilation space abwe lhe insulation is less than <br />an average of twelve inches shall beprovided vnth a vapor <br />retarder. Roof/ceiling assemblies whhout a vented airspace, <br />where neither the roof deck nor the roof structure are made of <br />wood, shall provide a continuous vapor retarder with taped <br />searns. <br />Ezception: Vapa retarders need not be provided <br />where all of the insulation is installed beiween the <br />roof mcmbrane and the structural roof deck <br />1313.3 Walls: Watls separating conditioned space from <br />imconditloned space shall be provided wdh a vapor retarW_r. <br />1377.4 Floors: Floors separating conditioned space from <br />unconditioned space shatl be provided with a vapor rE,arder. <br />1313.5 Crawl Spaces: A ground cover of six mil (0.006 inch <br />thick) black polyethylene or apprrn�ed equal shall be laid over <br />the ground wilhin crawl spaces. The ground cover shall be <br />ovedapped twelve inches mininum al the joints and shall <br />eMend to the (oundation wall. <br />Exception: The ground cover may be omitted in <br />crawl spaces if the crawl space has a concrete slab <br />floorwdh a minimum thickness ol thrre and one-half <br />inches <br />1374 Air Leakage <br />7314.1 Building Envelope: The requiremeMso(thissection <br />shall apply to 6uilding elenents separa6ng conditioned 6om <br />unconditioned spaces. Ezteriorjoints aro�nd windows and <br />door lrames, openings between watls and foundation, between <br />walls and roof and wall panels; openings at penetrations of <br />Wility services through walis, floas, and roo(s; and all other <br />openings in the building envelope shall be sealed, caulked, <br />gasketed, a weather5ripped tc limit air leakage. <br />1314.2 Glaang and Doors: Doors and operable glazing <br />separating conditioned from urxonditionetl space shall be <br />wea;herstripped. Fixed windows shall be tight fitting with glass <br />retain�vi by siops with sealarri or caulkirg all around. <br />Exception: Openings that are required to be fire <br />resistant <br />1314.3 Building /.ssemblies Used as Ducts or Plenums: <br />Building asse��lies used as ducts a p�enums shall be sealed, <br />cau!ked, :3nd gasketed to limit air leakage. <br />