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CEILING WITH VENTED ATTIC SFAeb nuovz <br /> R VALUE R VALUE <br /> FRAMING CEILING <br /> • <br /> • <br /> • <br /> • • <br /> 0.61 Air Film 0.61 <br /> . .• . • <br /> 36.00 Insulation 44.00 <br /> .41PAP ay 11) <br /> 0P--•'-'"‘ ° 4.38 Joist <br /> IIPMA-41.114104.0. _ .56 Ceiling .56 <br /> \:- 0.61 <br /> Air Film 0.61 <br /> 41.55 <br /> Total R 45.78 <br /> I1 <br /> .024 ,U = iz .021 <br /> • <br /> . , CATHEDRAL CEILING <br /> R VALUE R VALUE <br /> FRAMING CEILING <br /> • <br /> 0 <br /> '• inn iii inI IMMI'ffriTi Yr - <br /> ( <br /> C . l <br /> / ' . 0.61 - Inside air film 0.61 <br /> ) Y <br /> .56 Ceiling ..56 <br /> 14.375 Joist(Spacer) <br /> --- Insulation 33.85 <br /> --- Air Space .50 <br /> .67 Roof decking .67 <br /> . ----- <br /> 06 Felt .06 <br /> .44 Shingle .44 <br /> ----- <br /> 0.17 Outside air film 0.17 <br /> ------ <br /> 16.88 Total R 36.86 <br /> 1 <br /> .059 -- = U .027 <br /> R <br /> Window infiltration .5 cfm/lineal foot of crack <br /> Residential door infiltration 0.5 cfm/square foot or door and minimum code requirement . <br /> Non-residential door infiltration 11.0 cfm/lineal foot of crack <br /> rib 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 /> • <br /> . . <br /> • <br />