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CEILING man IMNIl:.v e►ii.s.'- - <br /> K VALUE <br /> R VALUE <br /> FRAMING CEILING <br /> • <br /> 0.61 Air Film 0.61 <br /> • <br /> 36.00 Insulation 44.00 <br /> --' g <br /> ----- - --41P <br /> 4.38 Joist <br /> %er <br /> _ .56 Ceiling .56 <br /> i 0.61 Air Film 0.61 <br /> 41.55 Total R •45.78 <br /> 1 .021 <br /> 1 .024 U - R <br /> CATHEDRAL CEILING <br /> R VALUE R VALUE <br /> FRAMING CEILING <br /> • <br /> 1IIIIIUtEI1 t nn ill i u D11r ' trul 0.61 Inside air film 0.61 <br /> .56 .56 <br /> Ceiling <br /> 14.375 Joist(Spacer) - <br /> 1 _ 33.85 <br /> _ Insulation <br /> --_-�-1 -I. , ,-- -4:. .-. ;- . _ Air Space .50 <br /> .67 Roof decking .67 <br /> .06 Felt .06 <br /> _44 Shingle .44 <br /> 0.17 Outside air film 0.17 • <br /> 16.88 Total R 36.86 <br /> .059 1 R = U .027 <br /> Window infiltration .5 cfm/lineal foot of cracoot or door and minimum code requirement <br /> Residential door infiltration 0.5 cfm/square <br /> Non-residential door infiltration 11.0 cfm/lineal foot of crack <br /> Ub 12" concrete block no insulation = .781 R 1.28 <br /> double glass = .52 <br /> triple glass = .31 • <br /> All exterior walls and ceilings must have a vapor barrier (0.10) perm max.). <br /> Vapor barrier must be on the inside (heated side) of wall. <br /> Vapor bariers of the polyethelene thin film have no R value. <br />