Laserfiche WebLink
CEILING WITH VfI�ED ATTIC SPACE ABOYE <br /> � R VALUE R YALUE <br /> � , . FRAMING . CEILING <br /> 0.61 Air Film 0.61 <br /> � 36.00 Insulation 44.00 <br /> / <br /> � . <br /> 4.38 Joist <br /> � <br /> .56 Ceiling ` .56 ' <br /> / <br /> � � 0.61 Air Film , 0.61 <br /> , <br /> 41.55 Zbtal R �45.78 <br /> �, <br /> .024 U = R � .021 <br /> CAT�DRAL CEILING <br /> R YALUE R YALUE <br /> FRAMING CEILING <br /> , 0.61 Inside air film 0.61 <br /> .56 Ceiling •56 <br /> 14.375 Joist�Space�� - <br /> - Insulation 33.85 <br /> . - 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 Zbtal R � 36.8b� <br /> .059 R = U .027 <br /> Windo�w infiltration .5 cfm/lineal foot of crack <br /> Residential door infiltration 0.5 cfm/square foot or door and minim�un ood� r��;rement <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 valls and ceilings must have a vapor barrier (0.10) perm max.). <br /> Vapor barrier �st be on the i.nside (heated side) af wall. <br /> vapor bariers of the polyethelene thin film have no R value. <br />