Distance (ft)
0
14
16
18
20
22
24
2
4
6
8
10
12
0
2
4
Concrete
Insulation
6
1990-91
8
26 Nov '90
17 Dec '90
10
15 Jan '91
19 Feb '91
12
19 Mar '91
14
Figure 12. Isotherm (32F) for the winter of 199091.
Distance (ft)
0
14
16
18
20
22
24
2
4
6
8
10
12
0
2
4
Concrete
Insulation
6
1991-92
8
11 Nov '91
03 Dec '91
10
14 Jan '92
18 Feb '92
12
10 Mar '92
14
Figure 13. Isotherm (32F) for the winter of 199192.
Distance (ft)
0
14
16
18
20
22
24
2
4
6
8
10
12
0
2
4
Concrete
Insulation
6
1992-93
8
03 Nov '92
15 Dec '92
10
12 Jan '93
02 Feb '93
12
09 Mar '93
14
Figure 14. Isotherm (32F) for the winter of 199293.
tunately, a temperature sensor was not placed
Temperatures at the toe of the footing (B25) and
above the floor insulation. This would have given
midway under the horizontal ground insulation
an indication of the comfort level of the floor;
(A27) are shown in Figures 17 and 18 for the three
however, technicians working in the addition
years of the study. Temperatures for the 199192
have commented that the floor never felt cold
year are generally lower than the other two years.
even when the outside temperature was 60F.
This coincides with the magnitudes of the freezing
8
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