Document pBe88pnke16QZDR7XRq69vxzX
No plaster--decorated rigid or build ing ward interior finish (V$ in.)
Plaster ( K in-) on metal lath--stud
space faced one side with bright aluminum foil Plaster {% in.) on metal lath6 on
studding--flexible insuiati&n (H in.)
between studding and in contact with sheathing Plaster {% in.) on metal lath6 on studding--flexible insulation ()$ in.) between studding--2 air spaces Plaster (% in.) on metal lath6 on studding--flexible insulation (1 in.) between studding--2 air spaces Plaster (% in.) on metal, lath6 on studding--rock wool fill {3% in.*) between studding*6
Heating Ventilating Air Conditioning Guide 1939
Table 5. Coefficients of Transmission (I/) of Various Types of Frame Construction
These coefficients ore expressed in Btu per hour per square foot per degree Fahrenheit difference in temperature between the air on the two sides, and are based.on a wind velocity of IS mph.
TYPICAL CONSTRUCTION
EXTERIOR FINISH
TYPE OF SHEATHING
1 in. Wood*1
Wood Siding or Clapboard
Rigid Insulation
H in- Plaster Board
Wood Shingles
1 in. Wood* in. Rigid Insulation*
in. Plaster Board*
Chapter 5. Heat Transmission Coefficients and Tables
INTERIOR FINISH
No Insulation Between Studding
in.) on rigid insulation i
Plaster (% in.) on metal lath on studding
t ec g
--53
3
a
ja
5
j9 % - oS
,Srl'O2a
ao
o 5.2
3 |x Ch
A B . C
0.25 0.26 0.25
a 5
3
.1 -T3 *3)
o g ---.'S
2*3
xl--'
Is
D
Plaster
E
0.19 0.15
(1 in.) on studding
d
5
-a g jd o ao
^ ef
3
Is
d. o F
0.11
G 0.19
a
f!
*"O"*oo 9?
IiSta
3.3 -Og--x'
.2 3 --3. H
0.17
Inbulation Between Studding
I J KLM 0.19 0.17 0.15 0.12 0.072
0.19 0.20 0.19
0.16
0.13
0.10
0.16
0.14
0.16
0.15
0.13 0.10
0.068
0.31 0.33 0.31
0.22
0.17
0.13
0.23
0.19
0.24
0.20
0.17 0.13
0.076
0.25 0.26 0.25
0.19
0.15
0.11
0.19
0.17
0.20
0.17
0.15 0.12
0.072
0.17 0.17 0.17 0.14 0.11 0.092 0.14 0.14 0.14 0.13 0.11 0.094 0.064
0.24 0.25 0.24 0.19 0.15 0.11 0.19 0.19 0.19 0.17 0.15 0.12 0.071
/WA &UCK.
1 in. Wood* 3%2 in. Rigid Insulation ^ in. Plaster Board
Brick/ Veneer
in- Rigid Insulation
/RtWHIMG'
in. Plaster Board
70
Computed from factors marked by * in Table 2. These coefficients may also be used with sufficient accuracy for plaster on wood lath Of piaster a plaster board.
Based on the actual width of 2 by 4-in. studding, namely, Z% in.
0.30 0.32 0.30
0.22
0.16
0.12
0.22
0.19
0.23
0.20
0.17 0.13
0.076
0.22 0.23 . 0.22
0.17
0.14
0.11
0.19
0.15
0.18
0.16
0.14 0.11
0-071
0.40 0.43 0.40 0.26 0.19 0.14 0.28 0.22 0.29 0.24 0.20 0.14 0.081
0.27 0.28 0.27
0.20
0.15
0.12
0.21
0.17
0.21
0.18
0.16 0.12
0.074
0.21 0.21 0.21
0.16
0.14
0.10
0.17
0.15
0.17
0.15
0.13 0.11
0.068
0.35 0.37 0.35
0.24
0.18
0.13
0.25
0.21
0.26
0.22
0.18 0.14
0.079
_,'
----------- -
owvww /u "*
furring stnp3 between wood shingles and sheathing.
/Small air space and mortar between building paper and brick veneer neglected.
"f.mhrane should be provided between the outer material and the insulation fill to *IS,rt^ble Tetu? SK absorPtion and a subsequent lowering of efficiency, atud and rock wool fill areas combined.