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Envelope - General Requirement <br />73111nsulatlon <br />1311.� Instellation Raquiremants: All insulallon malerials <br />shall be installed according lo Ihe manufacturer's <br />instruclions to achfeve proper densitler„ maintaln clearances <br />and maintain uniform R-values. To lhe maximum ezlent <br />possible, insulelion shall eMend over lhe full componenl <br />area to the Intendetl R-value. <br />7311.2 Roof/Cailing Insuletlon: Open•blown or poured <br />loose-fill Insulation may be used in attic spa�:es where lhe <br />slope ot the ceiling is nol more lhan 3/12 and there is at <br />least 30 inches oi clear distance from tha lop o( the bottom <br />chord of the truss or ceHing jofst to the underside oi lha <br />shoalhing al the rool ridge. Whe� eave vents are installed, <br />baflling o( Ihe vent openings shall ba provided so as ta <br />deflect the Incoming air above Ihe suAace of the Insulation. <br />W here Iighling fiutures are recessed inlo a suspended or <br />exposed grid ceiling, lhe rooViceiling assembly shall be <br />insulated in a Iocation olher ihan directly on ihe suspended <br />celling. <br />EXCEPTION: Type IC rdted recessed Ilphtinp fiztures. <br />Where Installed in wood framing, faced batt Insulalion <br />shall be lace slapled. * <br />1317.3 Wall Insuletion: Ezterior wall cavities isolated <br />during framing shall be tully insulaled to lhe levels o1 lhe <br />surrounding walls. When fnstalled in wood (raming, taced <br />batt Insulatfon shall be tace stapled. <br />Abuve grade eMerior Insulation shall be protected. <br />1371.1 Floor Insulallon: Floor Insulalion shall be IncWlled <br />in a pertnanent manner in substantial conlacl wilh Ihe <br />suAace being insulaled. Insulatfon supports shall be <br />installed so spacing Is not more than 24 inches on cenler. <br />Inslalled fnsulalion shall nol block lhe airflow lhrough <br />toundation venls. <br />1317.5 Sleb-On-Greda Floor: Slab-on-grade Insulation <br />Installed inside �he toundallon wall shall eMend downward <br />Irom lhe top oi Ihe slab a minfmum dislance of 24 inches or <br />to Ihe top of Ihe fooling, whichever is less. Insulalion <br />installed outside the foundation shall extend downwarcl a <br />minimum o( 24 Inches or lo lhe frost Ilne, whichever Is <br />greater. Above gretle Insulation shall be prolecled. <br />EXCEPTION: For monolithic slabs, the InsulaUon shall <br />extend downward (rom Uie top ol the sleb to the bottom ot lhe <br />footing. <br />1311.6 Redlant Floon (on or below grade): Slab-on- <br />grade insulation shall exlend downward irom the top of the <br />slab a minimum distance o1 36 inches or downward to the <br />top of the footing and horizontel for an aggregate ot nol lass <br />than 36 inches. <br />If required by lhe building oKcial where soil conditions <br />warrant such insulation, lhe enlire area of a radiant Boor <br />shali be thertnatly Isolaled frorn lhe sofl. Where a soil gas <br />control system le prowded below the radiant 11oor, which <br />resuils in increased convective tlow below Ihe redfant iloor, <br />the radlant floor shall be ihermally isolaled from the sub- <br />Ooorgravellayer. <br />1372 Glezing and Doorr• <br />1312.7 Standard Proeadure !or Determinatlon of Glazing <br />and Door U-Faetors: U•factors for glazing and doors shall <br />be determined, ceAified and labeled In accnrdanee wilh <br />Standard RS-31 by a certified independent agency Iicensed <br />by Ihe NaUonal Fenestratfon RaUng Council (NFRC). <br />Compliance shall be based on the Residenlial or ihe <br />Nonresidentlal Model Size. Producl samples useA tor U- <br />lactor determinations shall be production line units or <br />representative of units as purchased by the consumer or <br />contraclor. Unlabeled glazing and doors shall ba assigned <br />Ihe detaull U-faclor in Table 10•6. <br />1312.2 Solar Hset Gain Co�}fie � wl end Shading <br />Coefliclent: Solar Heal Gain CoeKclenl (SHGC), ehall be <br />detertnined, ceAified and Isbeled in accordance with lhe <br />National Feneslration Raling Council (NFRC) Standard by a <br />certified, in:iependent agency, lieensed by the NFRC. <br />E%CEPTON: Shadin9 coefllGents (SC) ahall be an <br />acceplable allemate lor compllance with wlar heal Paln <br />wefficient requlrcmenis. Shadinq coelfiUanls lor plezinp <br />shall be taken hom Chap�er 31 0l StenOard RS-1 or from Me <br />manufacturers test Eate. <br />1313 Molaturc Control <br />7373.1 Vapor Relardan: Vapor retarders shall be Inslalled <br />on the wartn slde (ir+ :�:::�er) ot Insulation es required by lhis <br />section. <br />EXCEPTON: Va�or retertler Inslelled with rro! more than 1f3 <br />ol Me nominal R•value beN.een II antl the conditbned s0ace. <br />1373.2 Roof/Cellinp Assembl�ss: Roo(/celling essemblles <br />where lhe ventilalion space abo��e lhe Insulalion is less lhan an <br />average oi 12 inehes shall be provided with e vapor reterder. <br />(For enclosed attics and enclosed rafler spacas, see Seclion <br />1203.2 ot lhe In�emallonal Bullding Code.) Rco1/cefling <br />assemblies withoul a ve�led airspace, ellowed only where <br />neither the roof deck nor the roof struclure are made ot wood, <br />shall provide a conti�uous vapor retarder with teped seams. <br />E%LEPTION: Vapor retarders need not b.. provided whae ell <br />ol Me Insulatbn Is Installed between the rool membrane and Me <br />sWctural �001 deck. <br />1313.3 Walls: W alls separaling condllioned space from <br />unconditioned space shall be provided with a vapor retarder. <br />1313.4 Floors: Floors separeUng condlUoned apace from <br />uncondilloned space shall be provided with a vapor reterder. <br />1373.5 Crawl�paeas: A ground eover ol siz mil (0.008 inch <br />thlck) black polyethylene or approved equal shall be Iaid over <br />the ground within crawlspaees. The ground cover shall be <br />oveAepped 12 Inches minimum at lhe Jolnts and ahall enlend to <br />Ihe toundatfon wall. <br />EXCEPTCIN: The ground cover may be omined in crawl <br />speces II Ihe crawlspace has a wnuele slab Iloor w�th a <br />minlmum thickness ot &1/21�ches. <br />1314 Alr Lsekage <br />7374.1 Bullding Enwlope: Th.a requirements of lhis sacUon <br />shall apply to bullding elemenls separeling condilioned from <br />uncondilioned spaces. E�nerior Juints around windows and <br />door frames, openings beNveen walls and foundalio�, between <br />walls and roof and wall panels; openings at panetratlons of <br />utiltty services through walls, floors and roofs; end all other <br />openings in the bullding envelopa shall be sealed, caulked, <br />gasketed or weatherstripped lo Iimit air leakage. <br />�374.2 Glezing and Doors: Doors and opereble gla�ing <br />separating conditfoned (rom unconditioned space shalt be <br />wealherstripped. Fixed windows shall be Ught firiing wilh glass <br />relained by stops with seelant or caulking all around. <br />E%CEPTON: Openinps Mat arc rcpulred to be fire resiaL�nl. <br />1314.3 Buildinp Asfemblles Ussd as Dueb or Planums: <br />Building assembltes used es ducls or plenums shall be sealed, <br />caulked and gaskaled to Iimit air leakage. <br />1314.4 Raceased Liphttng Fixtuns: When inslelled in Iha <br />building envelope, recessed Iightlng fizlures shall by Type IC <br />raled, and eertified under ASTM E283 lo have no more lhen <br />2.0 etm air movement from the condltloned space to the cefling <br />cavity. The lighling fiMure shall be les�ed a� 75 Pascals or 1.57 <br />Ibsttt' pressure diHerence and heve e label attached, showing <br />compifance with lhis tesl melhod. Recessed ifghting (IMures <br />shall 6e fnstailed with a gaskel or caulk belween fhe fixlure and <br />ceiling to prevent afr leakage. <br />�6 <br />