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CONS7RUCTI�N R VALUE <br /> CEILING SECTIfIN (INSULA7ED) : <br /> � •- - � Interior air film (1.f,1 <br /> � 2 �z� ��_�-�. _ �,�! <br /> ' j � _ ,_ . ��.��� <br /> 3 4 4 Exterior air film (still ) �.�1 <br /> TOTAL R = ''��; ,��� , <br /> U � i/R = � �'�? <br />� <br /> �\ . <br />'� � CEILING FRAHING SECTION: <br /> ( 2 5 1 lnterior atr film �.f�l <br /> ' Z ���- �.4-c <br /> AIR VENTED 3 �� ' - _ � . - - _� � .,,, <br /> 4 Interior air film still �. 1 <br /> FLOW 5 �-'i-- inches sof t woo�t ��, ,�� <br /> . TOTAL R a'" ='•.� �- <br /> � U = 1/R = � . ;=� � <br /> ' . CEILING SECTION (IfJSULATED) : <br /> ,1,(._�.,1,����'t.�C,Y;;�a����;� 1' {n t e r i o r a i r f i 1 m �.F 1 <br /> P= <br />