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1995 Edition <br />Washington State <br />Ene«3y Code <br />TABLE 10-7 <br />DEFAULT U-VALUE.S FOR CEILINGS <br />Ceilings Below Vented Attics <br />Standard Frame <br />Advunced Frame <br />Flat Ceiling <br />Baffled <br />R-19 <br />0.049 <br />0.047 <br />R-30 <br />0.036 <br />_ <br />0.032 <br />R•38 <br />0.031 <br />0.026 <br />_ <br />R49 <br />0.027 <br />0.020 <br />_ <br />R-60 <br />0 025 <br />0.017 <br />Scissors Truss <br />_ <br />R-30 (4/12 roof itch) <br />0.043 <br />0.031 <br />R-38 4/12 roof pitch) <br />_ <br />0.040 <br />_ <br />0.025 <br />R-49 4/12 r«tf_pi(ch) <br />0.038 <br />_ <br />0.020 <br />R-30 5/12 roof pitch <br />0.039 <br />0.032 <br />R-38 5112 roof itch` <br />0.035 <br />0.026 <br />R-49 5/12 roof itch <br />0032 <br />0.020 <br />Vaulted Ceilings <br />_ <br />16" O.C. <br />24" O.C. <br />Vented <br />_ <br />R-19 2x10joist <br />_ <br />(.049 <br />0A48 <br />R•30 2x12'oist <br />0.034 <br />0.033 <br />R-38 2xl4 joist <br />0.027 <br />0.027 <br />Unvenled <br />R-30 2x10 oist <br />0.034 <br />0.033 <br />R-38 202 joist <br />0.029 <br />0.027 <br />R-21 + R-21 2xl2'oist <br />0.026 <br />0.025 <br />Roof Deck <br />4x Beams, 48" O.C. <br />R-12.5 2"� Rigid insulation <br />_ 0,064 <br />R-21.9 3.5" Ri id insulation <br />0.040 <br />R-37.5 6" Rigid insulation <br />0.025 <br />R-SO 8" )U id insulation <br />0.019 <br />97 <br />