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124 CHAPTER 6 1948 Guide Table 5.; Coefficients of Transmission (U) of Frame Walls Coefficients ore expressed in Btu per {hour)'(square foot) {Fahrenheit degree difference in temperature between the air on the two sides), and are based on a'n outside wind'vehdty of 16. mph. No Insolation Between Studs3 (See Table 6) EXTERIOR FINISH INTERIOR FINISH : TYPE OF SHEATHING Gypsum 04 in. thick) Ply wood thick) Wood/ (Ktfw. thick) Bum. Papes Insul ating Board (H6w. thick) Metal Lath and Plaster*TM 0.33 032 036 030 Gypsum Board (H in.) DecoratedTM. 0.32 . 032 0.26 030 Wood Lath and PlasterTM 0.31 031 035 0.19 Gypsum Lath (H in.) Plastered1 031 030 035 0.19 Plywood (H in.) Plain or Decorated... 030 030 034 0.19 Insulating Board (H in.) Plain or Decorated.. 033 Insulating Board lath M in.) Plastered*___ 032 033 032 0.19 0.19 0.16 0.15 Insulating Board Lath (1 in.) Plastered*TM__ 0.17 0.17 0.15 0.12 Wood* Shingles /Ti/rw Metal lath and Plaster*TM. Gypsum Board (Ii in.) DecoratedTM Wood lath and Plaster!..' Gypsum Lath 04 in.) Plastered* Plywood (3i in.) Plain or Decorated.. Insulating Board 04 in.) Plain or Decorated.... Insulating Board Lath 04 in.) Plastered*TM. Insulating Board Lath (1 in.) Plastered*^..TM 035 035 0.24 034 034 0.19 0.19 0.14 035 036 0.17 0.25 036 0.17 034 035 0.16 034 035 0.16 034 034 0.16 0.19 0.19 0.14 0.18 0.19 0.13 0.14 0.15 0.11 Stucco /TUFA /TUCCO Metal Lath and Plaster*.... 0!43 0.42 032 033 Gypsum Board 04 in.) Decorated.. 0.42 0.41 031 033 Wood Lath and PiasterTM 0.40 039 030 032 Gypsum Lath 04 in.) Plastered*..... 039 039 030 032 Plywood 04 in.) Plain or Decorated._____ 039 038 039 032 Insulating Board 04 in.) Plain or Decorated.... 037 037 032 0.18 Insulating Board Lath 04 in.) Plastered*TM. 036 036 032. 0.17 Insulating Board Lath (1 in.) Plastered*__ 0.19 0J9 0.16 0.14 /HEATHING-) Brick Venerb* /TPPA /H CATHIKG^ Metal Lath and Plaster*___ J_____ Gypsum Board 04 in.) Decorated*. 'Wood Lath and PlasterTM Gypsum Lath (Him) Plastered* Plywood 04 in.) Plain or Decorated.... ............ Insulating Board 04 m.) Plain or DesoratedTM. Insulating Board Lath 04 in.) Plastered*____ Insulating Board Lath (1 in.) Plastered*_____ 037 036 035 034 034 035 034 0.18 036 036 034 034 . 033 035 034 0.18 038 038 037 037 037 031 030 0.15 031 031 030 030 030 0.17 0.16 0.13 Coefficients not weighted; effect of studding neglected. 6Plaster assumed $4 in. thick. Plaster assumed M in. thick. ^Furring strips (1 in. nominal thickness) between wood shingles and all sheathings except wood. Small air space and mortar between building paper and brick veneer neglected. /Nominal thickness. 1 in. Heat Transmission Coefficients of Building Materials 125 Table 6; ..Coefficients of Transmission (U) of Frame Walls with Insulation Between Framing*^ Coefficients are expressed in Btu per (hour) (square foot) (Fahrenheit degree difference in temperature between the air on the-two sides), and are based on an outside wind velocity-'of 16 mph. COEFFICIENT WITH INSULATION BETWEEN FRAMING ^COEFFICIENT ` " with NO INSULATION - BETWEEN . FRAMING* Mineral Wool ob Vegetable Fibebb m Blanket ob Bat Fobm* ' (Thickness below) 1 IN. 2 m. ` 3 IN. 3M w. Minebal Wool between Framing* i 55 ABCD 0.078 0.063 ' 0.054 0.051 33 0.083 0.067 0.056 0.053 34 0.088 0.092 0.070 0372 0.058 0.061 0.055 0357 35 3B 0.15 0.097 ' 0.075 0362 0.059 37 0.10 0378 0.10 . 0.080 0.11 0.082 0.11 0.084 030 0.12 ' 0.086 0364 0.066 0.067 0369 0.070 0.060 0.062 0.063 0.065 0366 38 39 40 .41 42 0.12 0.12 0.12 0.12 035 0.13 0.088 0.089 0.091 0.093 0.094 0.072 0.073 0374 0.075 0376 0367 0.068 0.069 0370 0.071 43 .44 45 48 , 47 0.13 0.096 0377 0.14 : . .. ' 0.097 . 0378 0.14' 0398 0.079 0.14 0.10 0.080 030 0.14 0.10 0.080 0.072 . 0.073 0.073 0.075 0.075 48 . 49 .50 51 52 i ' .035: 0.14 ` 0.15 0.15 0.15 0.15 0.10 0.10 0.10 ' 0.10 . 0.11 0381 0.082 0.083. 0.083 0.084 0.076 0.077 . 0377 0.078 0378 53 . 54 - 55 56 57 0.15 0.11 0.085 0.079 58 037 0.16 0.16 0.11 0.11 0.085' 0.086 0.080 0.080 59 60 0.16 . .0.11 . . 0.086 ` 0.081 61 0.40 0.16 0.11 0387 0.082 62 0.41 0.16 0.11 0387 0.16 . . 0.11 . . 0.088 043 0.17 0.11 0388 0.44 0.17 0.11 0339 0.082 0382 0.082 0.083 63 64 65 66 This table may be used for determining the coefficients of transmission of frame constructions with the types and thicknesses of insulation indicated in Columns A to D inclusive between framing. Columns A. B and C'majr beused for wails, ceilings or roofs with only one air space between framing but are not applicable to ceilings with no flooring above. (See Table 11.) Column D is applicable to walls only. Example: Find the coefficient of transmission 01 a frame wall consisting of wood siding. H4 In. insulating board sheathing, studs, gypsum lath and plaster, with 2 in. blanket insulation between studs. According to Table 5. a wall of this construction with no insulation between studs has a coefficient of 0.19 (Wall No. 4D). Referring to Column B above, it will be found that a wall of this value with 2 in. blanket insulation between the studs has a.coefficient of 0.084. ' Coefficients corrected for 2 x 4 framing, 16 in. on centers--15 per cent of surface area. - `Based on one air space between framing. <No air space. .. -