R15 Batts Between 2x4@16 Wall Joists, Joist Thermal Shorts.ods
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

 
View only
 
 
ABCDEFGHIJKLMNOPQRSTUVWXYZAAABACADAE
1
R15R15R15R15R15R15R15R15R5R1R0.4R0.004
2
Full Contact1% Out Of Contact5% Out Of Contact10% Out Of Contact20% Out Of Contact30% Out Of Contact70% Out Of Contact100% Out Of ContactFull ContactFull ContactFull ContactFull Contact
3
Percent Insulation Decrepitude015102030701000000
4
Input Values
5
No-Coverage R-Value000000000000
6
Joists R-Value. 0.94 per inch3.33.33.33.33.33.33.33.33.33.33.33.3
7
Batts R-Value1515151515151515510.100.10
8
9
Area Fraction, Joists0.10.10.10.10.10.10.10.10.10.10.10.1
10
Area Fraction, Missing Insulation00.0090.0450.090.180.270.630.90000
11
Computed Area Fraction, Working Batts0.90.8910.8550.810.720.630.2700.90.90.90.9
12
13
Computed U-Values
14
Note: Each is 1/(R-value + 3)
15
U Joists0.1590.1590.1590.1590.1590.1590.1590.1590.1590.1590.1590.159
16
U missing insulation0.3330.3330.3330.3330.3330.3330.3330.3330.3330.3330.3330.333
17
U batts0.0560.0560.0560.0560.0560.0560.0560.0560.1250.2500.3230.323
18
19
20
21
Note: U eff is the sum of area fractions times computed U-values.
22
U eff0.06590.06840.07840.09090.11590.14090.24090.31590.12840.24090.30620.3062
23
Note: R eff = 1/U eff, minus 3.
24
R eff12.1811.639.768.005.634.101.150.174.791.150.270.27
25
26
Sim, up to three components:
27
R1000000000000
28
%100.94.59182763900000
29
U10.0002.25011.25022.50045.00067.500157.500225.0000.0000.0000.0000.000
30
R23.33.33.33.33.33.33.33.33.33.33.33.3
31
%2101010101010101010101010
32
U23.0303.0303.0303.0303.0303.0303.0303.0303.0303.0303.0303.030
33
R31515151515151515510.40.004
34
%39089.185.581726327090909090
35
U36.0005.9405.7005.4004.8004.2001.8000.00018.00090.000225.00022500.000
36
37
Sim U-Average0.0900.1120.2000.3090.5280.7471.6232.2800.2100.9302.280225.030
38
Sim R-Average11.078.915.003.231.891.34.62.444.761.07.44.00
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Loading...
 
 
 
Sheet1
Sheet2
Sheet3