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Insulation R Values: diatomaceous earth
1260 to 764
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| diatomaceous earth | 1260 | 1/12/1961 | 22.37 | 0.9806 | 9.621 | Diatomite powder from diatomaceous earth | Loose | 0.3321 | Johns Manville | Diatomaceous Earth | 129.6 | 0.434291 | 0.076483 | NIST SRD 81 API | ASTM C 177 | Celite® |
| diatomaceous earth | 1261 | 1/13/1961 | 24.42 | 0.9796 | 9.621 | Diatomite powder from diatomaceous earth | Loose | 0.3081 | Johns Manville | Diatomaceous Earth | 73.54 | 0.46812 | 0.082441 | NIST SRD 81 API | ASTM C 177 | Celite® |
| diatomaceous earth | 177 | 5/28/1940 | — | 0.493 | 14.3 | Air duct liner, ½ in. | Board | 0.399 | Silicair Co. | Diatomaceous Earth | 88.2 | 0.361473 | 0.063659 | NIST SRD 81 API | — | Silicair |
| diatomaceous earth | 224 | 11/29/1940 | — | 0.572 | 15.2 | Paper backing (both faces), ½ in. | Board | 0.339 | Silicair Co. | Diatomaceous Earth | 74.8 | 0.425451 | 0.074926 | NIST SRD 81 API | — | Silicair |
| diatomaceous earth | 254 | 7/23/1941 | — | 0.56 | 22 | Paper backing (both faces), ½ in. | Board | 0.508 | Silicair Co. | Diatomaceous Earth | 92.1 | 0.283913 | 0.05 | NIST SRD 81 API | — | Silicair |
| diatomaceous earth | 256 | 8/6/1941 | — | 0.56 | 16.8 | Paper backing (both faces), specimen A, ½ in. | Board | 0.406 | Silicair Co. | Diatomaceous Earth | 98.4 | 0.355241 | 0.062562 | NIST SRD 81 API | — | Silicair |
| diatomaceous earth | 257 | 8/7/1941 | — | 0.56 | 19.3 | Paper backing (both faces), specimen B, ½ in. | Board | 0.44 | Silicair Co. | Diatomaceous Earth | 98.4 | 0.327791 | 0.057727 | NIST SRD 81 API | — | Silicair |
| diatomaceous earth | 258 | 8/8/1941 | — | 1 | 16.6 | Paper backing (both faces), specimen D, 1 in. | Board | 0.415 | Silicair Co. | Diatomaceous Earth | 98.1 | 0.347537 | 0.061205 | NIST SRD 81 API | — | Silicair |
| diatomaceous earth | 347 | 10/11/1943 | 22.19 | 1.01 | 26.66 | Diatomaceous earth and asbestos; 7.5x6x1 in. | Block | 0.6755 | Johns Manville | Diatomaceous Earth | 95.78 | 0.213513 | 0.037602 | NIST SRD 81 API | — | — |
| diatomaceous earth | 764 | 7/19/1950 | 23.35 | 0.9796 | 10.38 | Specimens placed in wood frames | Loose | 0.3043 | Johns Manville | Diatomaceous Earth | 122.64 | 0.473966 | 0.08347 | NIST SRD 81 API | ASTM C 177 | Sil-O-Cel® |
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