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2004 Wash'^ ton State Nonresidential Ener Code Com li^�ce Fortn <br /> : • • ' ' ' <br /> 200a Washinptm Sl�le NavesWaMial Erarpy COUe Com0liance Fams RevlseE May P(105 <br /> Envelope - General Requirements <br /> 1311 Insulalbn Produd samples used fa U-factor determinatiore shall be <br /> 1371.1 Irmtallation Re uiremenfs: A1 insutation materials producfion ine units a represeMative d units as puchased by <br /> Q the coreuner or wntracla.UrYabeled glazing and doors shall <br /> shall be installed according to ihe manufacturers instructions be assigned the default LLfaqor in Section 2006. <br /> lo achieve properdensities,maintain c�earences,and maintain �g�2.2 Solar Neat Gain CoefBcientand Shading <br /> unAortn R-values.To the maxmum extenl posside,insUation Coef(icieM:Sdar Heat Gan Coefficient(SHGC�, shall be <br /> shall e�dend over the full mmponem area to the irrtended R- delertnined, certified and labeled in accordance with the <br /> value. <br /> 1311.2 RooflCeilin Insulation:0 n-down a oured loose- National Fenestration Ra6ng Council(NFRC)Sandard by a <br /> 9 PQ P certified, indeperdent agency, icereed by the NFRC. <br /> fill insulation may be used in attic spaces where the slope d <br /> the ceiling is not rtrore than 3112 and there is al least thirty Efcceplion: Shading cce�icients(SC)shall be an <br /> inches of ciear distance iran the top d the bottom chord ot the acceptable akernate for canpliance with solar heat <br /> trus,or ceiling jo'st to the underside of the sheathirg atthe gain coe(ficient requirements. Shading coe(fiderHs <br /> roof ridge.When eave vmts are inslalled,baffling of lhe vent for glazing shall be taken from Chapler 27 oi <br /> openings shal be prwided so as to deflecl the incoming air Standard RS27 or from lhemanufacturers test data. <br /> above lhe surfxe of the insulation. 1373 Moisture CoMrd <br /> Where IigMirg fixlures are recessed into a suspended or 1313.1 Vapa Retarde�a:Vapor relarders shail be instaNed on <br /> exposed grid caling,the rod/ceiling assembly shal be ttie waim side(in wiMer)of insulatbn as required by this <br /> insulaled in a localion other than direclly on the suspended section. <br /> ceiing. Ezceptlon:Vapa retmder irutailed with not mae <br /> Exception: Type IC rated recessed lighting fixtures. than 1l3 d the naminal R-value between it and the <br /> Where instalied in wood 6aming,faced batt insulation wndiuoned space. <br /> shall be(ace staped. 1313.2 Roof/Ceiling Assembliea:Roof/calirg assemblies <br /> 1311.3 Wall Inauiation:Exterior wall cavilies isdaled during W�re the ventilation space above the ireulffiion is less than <br /> framirg shall be fuly nsulated to the levels of the surtounding an average oi twelve incFies shall te povided with a vapor <br /> walls.When installed in wood franng,faced balt insJalion retarder. Rooflceiing assemblies witFaut a vented airspace, <br /> shall be face staped. where neither the roof dedc nor the roof struclure are made d <br /> Abrne grade exterior inrulation shall be proteded. W�d, shall provide a contlnuous vapa retarderweh taped <br /> seams. <br /> 1311.4 Floor Insulation: Floa insulation shall be installed in ExcepUon:Vapor reta�ders need not be prwided <br /> a pertnanenl manner in substarriial conlact wilh the surtace where all of the insulaGon is installed belweeri the <br /> beirg ins�Aated. Insulalion supports shall be installed so roof inembrane and lhe 5ructura�rod deck <br /> spxing 's not more lhan twenty�our inches on center. <br /> Installed insulalion shall not dock the airAowthrough 1313.3 Walls:Walk separating corditionedspace 6om <br /> foundation vents. unconditioned space shall be proHded with a vapor retarder. <br /> 1311.5 Slab-OnGrade Floa: Slab-on-grade insWation 1313.4 Floors:Floas separating conditioned space 6om <br /> installed inside the foundation wap shall eztend dowmvard 6om unconditioned space shall be prwided with a vapor retarder. <br /> lhe lop of lhe slab a minimum distance of lwenty-four inches or 1313.5 Gawl Spaces:A ground cover d siz mil(0.006 inch <br /> to the top af the footing,whichever is less. Insulation irutalled ihick)black polyethylene or approved equal shall be laid over <br /> oNside the foundation shall extend downward a minim,m d the grourd within aavl spaces.The ground cover shall be <br /> twenly-four inches orto Ne hostline,whichever is grealer, overlapped AvNve inches minimum atthejoirts ard shall <br /> Above gade insulation shall be proleded. eztend lo lhefoundation wall. <br /> Ezception:Fa mondithic slabs,the insulation shall Ezception:The ground cwer may be omitled in <br /> extend downward fran the top of the slab lo lhe crawl spaces if�he cravA space has a concrete slab <br /> bdtom of the foo6ng. Floorwith a mirvmum ihickness of thrce and one-half <br /> 1311.6RadiantFloors�onorbelowgrade): Slab•on-grade inches. <br /> insulalion shall exlend downward from the top ot the slab a 1314 Air Leakage <br /> minimum distance of thirty-six inches or downward to the top cf 1314.1 Building Envelope:The requiremenls d ihis section <br /> the footing and horizonla�fa an aggregate of not less than shall apply to build"ng elemenls separatirg conditioned from <br /> thirty-six inches. uncond'Aioned spaces. Ezleriorjoints around windavs and <br /> �f required by the building official where sdl conddions doorframes,openings belwcen wa�ls and foundation, betxeen <br /> warrant such insulation,the entire area of a radiant floor shall walls and roof and wal panels;openings at peretrations aF <br /> be lhermaRy isolated fran the sdl. Where a so�gas conlyd utiliry services through walls,Aoas,and roofs; and all other <br /> system is provided below the radiaM floor,which resulis in openiigs in the building envelope shall be sealed, wulked, <br /> increased convective Flow below the radiant floor,ihe raNant gasketed, or�nealherstripped to IimA a'u leakage. <br /> floor shall be tl•ertnauy isolated 6om thesub-Floor gravel layer. 1314.2 Glazing and Doon:Doas and operade glazing <br /> 1372 Glazing and Doors separatirg condGoned from uncondtioned space shall be <br /> 1312.1 Standard Procedure for Determination of Glazing `�'���rstripped. Fixed windows shall be tight tdting with glass <br /> and Door U•Factors: U-tadors fa glazing and doors shall be retained by stops wilh sealant a caullang all around. <br /> determined, certified and labeled in accordance with Slardard Ezception:Operings that are requred to be tire <br /> RS•31 by a certified irxlependent agency licensed by ihe resistarn. <br /> National Fenestration Rating Council(NFRC�.Cempliance 7374.�Building Asaemblies Used aa Ducb or Plenums: <br /> shall be based on the Residential or the Nonresidential Model BuiHirg assemdies used as dutts orplenums shall be sealed, <br /> Size. caulked,and gaskeled to limit a'r leakage. <br /> �� ' � <br />