MIL-HDBK-1003/19
TABLE III.
R-Factors of building materials.
(Cont.)
R-Value
Density
Material and Description
per inch for listed
(lb/ft3) thickness thickness
Concrete block, 3 oval core
Sand and gravel aggregate
4-inch
--
--
0.71
8-inch
--
--
1.11
12-inch
--
--
1.28
Cinder aggregate
3-inch
--
--
0.86
4-inch
--
--
1.11
8-inch
--
--
1.72
12-inch
--
--
1.89
Lightweight aggregate
3-inch
--
--
1.27
(expanded shale, clay or slate
4-inch
--
--
1.50
or slag; pumice)
8-inch
--
--
2.00
12-inch
--
--
2.72
Concrete blocks, rectangular core
Sand and gravel aggregate
2 core, 36 lb[*]
8-inch
--
--
1.04
same, filled cores[**]
--
--
1.93
Lightweight aggregates
3 core, 19 lb[*]
6-inch
--
--
1.65
same, filled cores[**]
--
--
2.99
2 core, 24 lb[*]
8-inch
--
--
2.18
same, filled cores[**]
--
--
5.03
3 core, 38 lb[*]
12-inch
--
--
2.48
same, filled cores[**]
--
--
5.82
Stone, lime or sand
--
0.08
--
Granite, marble
150-175
0.05
--
Adobe
10-inch
--
--
2.78
14-inch
--
--
3.89
Plastering Materials
Cement plaster, sand aggregate
116
0.20
--
Gypsum plaster
Lightweight aggregate
1/2-inch
45
--
0.32
Lightweight aggregate
3/8-inch
45
--
0.39
Same, on metal lath
3/4-inch
--
--
0.47
Perlite aggregate
45
0.67
--
Sand aggregate
105
0.18
--
Same, on metal lath
3/4-inch
--
--
0.10
Same, on wood lath
3/4-inch
--
--
0.40
Vermiculite aggregate
45
0.59
--
Roofing materials
Asbestos-cement shingles
120
--
0.21
Asphalt roll roofing
70
--
0.15
Built-up roofing
3/8-inch
70
--
0.44
Slate roofing
1/2-inch
--
--
0.05
Wood shingles
--
--
0.94
56
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