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-��Uri 4�v�! :j1011 JIaIC IVOIIf:,SI�Cilii�l �iiE'.fQ`•j r...�,0iic ,.Gii'�_ Cc i OC(Tl <br />Nlashingten State Ncnresidential Energy Code Complianc= Forms <br />�nvelope - Generai Ret�uire�n��.� <br />'1311 Insulation <br />'1311.1 ins'tallation Requirements: Ail ins �. � _ <br />shall be installed according to the manufact:�re;'s <br />instructions to achieve proper densities, maintain clearances <br />and maintain uniform R-values. To the maximum extent <br />possibie, insulation shall extend over the fuii component <br />area to the intended R-value. <br />1311.2 Roof/Ceiling Insulation: Open-blov��n or poured <br />loose-fill insulation may be used in attic spaces where the <br />slope of the ceiling is not more than 3/12 and there is at <br />least 30 inches of clear distance from the top of the bottom <br />chord of the truss or cefling joist to the �mderside of the <br />sheathing at the roof ridge. When eave vents are instalied, <br />baffling of the vent openings shall be provided so as to <br />deflect the incoming air above the surface of the insulation. <br />Where lighting fixtures are recessed into a suspended or <br />exposed grid ceiling, the roof/ceiling assembly shall be <br />insulated in a location other than directly on the suspended <br />ceiling. <br />EXCEPTION: Type IC rated recessed lighting fixtures. <br />Where installed in Niood framing, faced batt insulation <br />shali be face stapled. <br />1311.3 Wall Insulation: Exterior wall cavities isolated <br />during framing shall be fully insulated to the levels of the <br />surrounding walls. When installed in wood frami�g, faced <br />batt insulation shall be face stapled. <br />Above grade exterior insulation shall be proiected. <br />1311.4 Floor Insulation: Floor insulation shall be installed <br />in a permanent manner in substantial contact �vith the <br />surface being insulated. Insulation supports shall be <br />installed so spacing is not more than 24 inches on center. <br />Installed insulation shall not block the airFlow through <br />foundation vents. <br />1311.5 Slab-On-Grade Floor. Slab-on-grade insulation <br />installed insfde the foundation wall shall extend downward <br />from the top of the slab a minimur7� distance of 24 inches or <br />to the top of the footing, whichever is less. Insulation <br />installed outside the foundation shall extend downward a <br />minimum of 24 inches or to the frost line, whichever is <br />yreater. Above grade insulation shall be protected. <br />EXCEPTION: For monolithic slabs. the insulation shall <br />e;�tend downward from the top of the slab to the bottom of the <br />footing <br />1311.6 Radiant Floors (on or below grade): Slab-on- <br />grade insulation shall extend downward from the top of the <br />slab a ininimum distance of 36 inches or downward to the <br />top of the footing and horizontal for an aggregate of not less <br />than 36 inches. <br />If required by the building official where soil conditions <br />warrant such insulation, the entire area of a radiant floor <br />shall be thermalty isolated from the soil. Where a soil gas <br />control system is provided below the radiant floor, �vhich <br />results in increased convective flow below the radiant floor. <br />the radiant floor shall be thermally isolated from the sub- <br />floor gravel iayer. <br />1312 Glazing and Doors <br />1312.1 Standard Procedure for Determination of Glazing <br />and Door U-Faciors: U-factors for glazinq and doors shall <br />be determined. certified and labeled in accordance with <br />Standard RS-31 by a certified indepenclent agency licensed <br />by the National Fenestration Rating Council (NFRC). <br />Compliance shall be based on the Residentia! or the <br />Nonresidential Model Size. Product samples used for U- <br />factor determinations shall be production line units or <br />representative of units as purchased by the consumer or <br />contractor. Unlabeled glazing and doors shall be assigned <br />the default U-factor in Table 10-6. <br />F.=vised Jui�i'�Cr7:�'�, <br />]J 3L.L J'Gi� f'1- d'I: 1Jcll.il l.;J(.:ill ucf3t d11U .7f1�1U <br />Coeff9cr�nt: Solar Heat Gain Coefficient (SNGC)� s: �. �:-. <br />determined, cer2ified and labeled in accordance tivith ;I,,:: <br />National Fenestration Rating Council (N�RC) Standa, c; i_. <br />certified, independent agency, licensed by the fJFRC- <br />EXCEPTION: Shading coefficienis (SCj shail be an <br />acceptable altemate for compliance with solar heat gain <br />coefficient reyuirements. Shading coefficients for glazing <br />shall be taken from Chapter 31 of Standard RS-1 or from the <br />manufacturer's test data. <br />1313 Moisture Controi <br />13� 3.1 Vapor Retarders: Vapor retarders shall be installed <br />on the warm side (in winter) of insulation as required by this <br />section. <br />EXCEPTION: Vapor retarder installed with not more than 1/; <br />of the nominal R-value between it and the conditioned space <br />1313.2 Roof/Ceiling Assemblies: Roof/ceiling assembli�s <br />where the ventilation space above the insulation is less than a��. <br />average of 12 inches shall be provided with a vapor retarder. <br />(For enclosed attics and enclosed rafter spaces, see Section <br />1203.2 of the International Building Code.) Roof/ceiling <br />assemblies wiihout a vented airspace, allowed only where <br />neither the roof deck nor the roof structure are made of woc; .±. <br />shall provide a continuous vapor retarder with taped seams. <br />EXC�?TION: Vapor retarders need not be provided where ali <br />of the insulation is fnstalled between the roof inembrane and the <br />structural roof deck. <br />1313.3 Walls: Walls separating conditioned space from <br />unconditioned space shall be provided with a vapor retarder <br />� 313.4 Floors: Floors separating conditioned space from <br />unconditioned space shall be provided with a vapor retarder <br />1313.5 Crawlspaces: A ground cover of six mil (0.006 inch <br />thick) black polyethylene or approved equal shall be laid over <br />the ground �vithin crawlspaces. The gro�.ind cover sha!I bt� <br />overlapped 12 fnches minimum at the jcints ��nd shall e;xt��n�l �u <br />the foundation wall. <br />EXCEPTION: The qround cover rnay h� nii�ift���:'. in �a�n�nil <br />spaces iF the cr�wlsp�ce has a cnnc:r�r,�, ;;iab flonr �n�i[I�i r-� <br />minimum thickness of 3-1/2 inch�_-_; <br />1314 Air Leakage <br />1314.1 Building Envelope: The ray�_;!��n;��nts u: ti��is ��c��i��,i� <br />shall apply to building elements separating conditioned fro:r <br />unconditioned spaces. Exterior joints around windows anr! <br />door frames, openings between walls and foundation, bet��; ; <br />walls and roof and w�all panels; openings at penetrations o� <br />utility services through walls, floors and roofs; and all othe: <br />openings in the building envelope shall be s2aled, caulke:i. <br />gasketed or weafherstripped to limit air leakage. <br />1314.2 Glazing and Doors: Doors and operable glaziny <br />separating conditioned from unconditioned space shall b�- <br />���eatherstripped. Fixed windows shall be fight fitting with gla�� <br />reiained by stops with sealant or caulking all around. <br />EXCEPTION: Openings that are required to be fire resistant <br />1314.3 Buiiding Assemblies Used as Ducts or Plenums: <br />Building assemblies used as ducts or plenums shall be se�3le�I. <br />caulked and gasketed to limit air leakage. <br />1314.4 Recessed Lighting Fixtures: VVhen installed in the <br />building envelope, recessed lighting fixtures shall by Type IC <br />rated, and certified under ASTM E283 to have no more than <br />2.0 cfm air movement from the conditioned space to the ceiling <br />cavitX. The lighting fixture shall be tested at 75 Pascals or 1.57 <br />Ibs/ft` pressure difference and have a label attached, showifng <br />compliance witn this test rnethod. Recessed lighting fixtures <br />shall be installed with a gasket or caulk between the fixture and <br />ceiling to prevent air leakage. <br />� <br />