Table 1. Core sample findings for roof D1.
Moisture
content
Thickness
(% of
TRR
Core
Insulation
(in.)
dry weight)
(%)
Status
1
EPS
0.87
0
100
dry
1
EPS
2
8
99
dry
1
FGL
2.5
25
88
dry
1
FGL(frozen)
1
455
16
WET
2
EPS
2
0
100
dry
2
FGL
2
0
100
dry
2
FGL
2
0
100
dry
2
FGL(frozen)
3
295
25
WET
8
EPS
2
2
100
dry
8
FGL
2
0
100
dry
8
FGL
2
1
99
dry
8
FGL
1
1
99
dry
8
FGL(frozen)
1
407
18
WET
13
EPS
2
1
100
dry
13
FGL
2
0
100
dry
13
FGL
2
0
100
dry
13
FGL
2
0
100
dry
Notes:
EPS = expanded polystyrene
FGL = fibrous glass
Samples are tabulated above as they are positioned in the roof from top to bottom.
Core 1: Taken near edge of roof where additional EPS was present as a tapered edge strip.
Additional frozen fibrous glass existed below the portion sampled. It was probably about
3.5 in. thick.
Core 13: All of this sample was recovered down to the concrete deck and no frozen material
was present. The thickness of fibrous glass does not add up to 7 in. This is probably due to
the compression it experiences upon sampling.
Figure 8. Southeast corner of roof D1 showing areas cleaned for cores 1 and 2 and
a larger area being prepared for core 8 and cut A, looking SE.
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