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Insulation R Values: nbs fibrous glass
1937 to 1946
Insulation R-values and thermal conductivity data from NIST SRD 81 — covers fiberglass, foam, cellulose, mineral wool, and other building insulation materials
| material id | record id | date | delta t (F) | delta x (in) | density (lb/ft3) | description | form | k w mk (W/mK) | manufacturer | material | mean temp (F) | r value per inch (ft2hF/BTU/in) | rsi per inch (m2K/W/in) | standard | test method | trade name | uncertainty |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| nbs fibrous glass | 1937 | 6/10/1976 | 21.29 | 0.9449 | 8.705 | Lot 1961 | Board | 0.1974 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 1.4 | 0.730638 | 0.128673 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1938 | 9/21/1976 | 24.9 | 0.9964 | 8.124 | Lot 1958, return for check | Board | 0.2272 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.74 | 0.634806 | 0.111796 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | — |
| nbs fibrous glass | 1939 | 9/23/1976 | 22.5 | 1.0003 | 8.092 | Lot 1958, return for check | Board | 0.2496 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 127.39 | 0.577836 | 0.101763 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1940 | 9/28/1976 | 25.93 | 1.0004 | 8.091 | Lot 1958, return for check | Board | 0.2062 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 43.31 | 0.699456 | 0.123181 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1941 | 11/5/1976 | 24.56 | 1.0256 | 7.47 | Lot 1970 | Board | 0.2279 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.66 | 0.632856 | 0.111452 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1942 | 2/4/1977 | 24.55 | 1.014 | 6.147 | Lot (?) | Board | 0.2172 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.51 | 0.664033 | 0.116943 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | — |
| nbs fibrous glass | 1943 | 2/5/1977 | 24.44 | 1.0125 | 6.17 | Lot (?) | Board | 0.218 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.52 | 0.661596 | 0.116514 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1944 | 2/8/1977 | 24.28 | 1.0193 | 7.822 | Lot (?) | Board | 0.2263 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.26 | 0.637331 | 0.11224 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1945 | 4/1/1977 | 24.54 | 0.961 | 9.207 | Lot (?) | Board | 0.2298 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.21 | 0.627624 | 0.110531 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | — |
| nbs fibrous glass | 1946 | 4/20/1977 | 24.62 | 1.0187 | 7.601 | Lot (?) | Board | 0.2295 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.73 | 0.628444 | 0.110675 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
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