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, � <br /> e r , <br /> � CONS7RUCT10N R VALUE• ' <br /> CE1LI�1G SECTI�N (I�ISUl.A7ED)�: ' <br /> - � �� !�[eriar air f(lm �•��� <br /> . 2 <br /> 3 b tN�Nv �i ��'a <br /> 3 4 �+ �Exterio� air f( lm (still) �•(�1 �, <br /> . - � 70TAL R s <br /> U = 1/R = � <br /> � CEtLING FRAHlNr SEC71oN: � <br /> � 2 5 1 Interior aIr film � R.E+1 <br /> • 2 . <br /> AIR �� VENTED 4 nterior ai`r fiim sti I1 4. �o <br /> F'L��f � „ inches soft wooci � f <br /> TOTAL R = . I J <br /> � u = t/R = .fl'fi� �/ <br /> � . . . <br /> � • . CEILIt�G SEGTION (1flSULATED) : �•�, <br /> �y�,���,,,,�����3��_T�,/ 1' {n te�i or a i r f i 1 m . <br /> }� .�� 2 <br /> . • 3 . : . <br /> 4 Exterior ai film still cl. 1 <br /> TOTAL' R = <br /> � Us i/R = <br /> , / ti, <br /> �. <br /> ( 2 � 4 5 CEILINr, FRAt-tttlr, SECTIO�t: �/ � <br /> . . 1• Intertor air film �•F� <br /> VENTED 2 <br /> • . 3 <br /> 4 Extertor air fi still �• 1 <br /> � " 5 tnche soft wood <br /> � TOTAL R = <br /> U � 1/R = <br /> 3 4 5 � ' <br /> . L � ••�'c:";►, . • . • <br /> ,,..-:� •,••::=:=;�: . n.�t <br /> , ,. •• *s��='•''"� � � 1 InsTde air film <br /> '=°`�'��'r=� Z <br /> ;�;:..=:;:;::� :� •� � . 3 . • <br /> _ . 4' n. i7 = <br /> / � • I 2 S Outside air �lm <br /> � TOTAL R � __ <br /> � — <br /> � U = lIR = <br /> . <br /> . 17 - .. <br /> . - <br />