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EXTERIOR ENVELOPE <br /> AVERAGE"U"COMPUTATION <br /> Page 2 <br /> Total Roof Cerlrng area = 1873.00 ,sf <br /> K. Total skylight area 0 sf <br /> L. Total roof/ceiling framing area(average 10%) 187 sf <br /> M. Total net insulated roof/ceiling area(HOUSE) 1686 sf <br /> determine "U"value of each roof!ceiling segment <br /> k. 0 sf x "u" 0.55 = 0.00 <br /> 1. 187.3 sf x "u" 0.021 = 3.96 <br /> m. 1685.7 sf x "u" 0.018 = 30.86 <br /> 4. Total"U"Value-Roof/Ceiling Segments = 34.82 <br /> If item�#4 is the same or less than item#2,you have met the intent of SBC 6006�I. <br /> ALTERNATIVE BUILDING ENVELOPE DESIGN <br /> To utilize the"total envelope system"method,the value established by the sum of items <br /> #3&#4 shall not be greater than the sum of items#1 8c#2. <br /> l. 239.25 + 2. 48.70 = 287.95 <br /> 3. 186.71 + 4. 34.82 = 221.53 <br />