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HomeMy WebLinkAboutMaster Permit.1015 Waters Ave.0204.2019 (10).ARBK Bighorn Consulting Engineers,Inc. ROOF DEW POINT ANALYSIS Outside air film—0.17 °F*ft2*h/Btu Roofing Material—0.33 °F*ft2*h/Btu 5/8"plywood—0.77 °F*ft2*hBtu Joists roof framing with spray foam insulation— 8" at R5.8/inch=>46.4 °F*ft2*h/Btu 5/8" gypsum board—0.56 °F*ft2*h/Btu Inside air film—0.61 °F*ft2*hBtu Total Roof R-Value—49 °F*ft2*hBtu Interior Conditions—70°F and 35% RH=>Dew Point = 41°F R-Value at 41°F Dew Point: 49 °F •f t2 • h 99°F L T x (70°F DB — 41°F DP) = 14.35 Btu This implies the dew point falls inside the spray foam insulation. \„1/4.-) BLA:!*.` •:%% 44 • :o G+: 31. :2 33843 • +, •••••••• s '+, /MAL RECEIVED 1015 Waters Residence Aspen,Colorado-Roof Dew Point Analysis- 18030 6V b7/2 019 ASPEN BUILDING DEPARTMENT