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Insulation R Values: cotton burr
297 to 306
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) | material | mean temp (F) | r value per inch (ft2hF/BTU/in) | rsi per inch (m2K/W/in) | standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cotton burr | 297 | 7/8/1942 | 21.17 | 0.998 | 7.76 | Fibers placed in wood frames | Loose | 0.3624 | Cotton Burr | 101.44 | 0.39798 | 0.070088 | NIST SRD 81 API |
| cotton burr | 298 | 7/28/1942 | 20.57 | 1.005 | 5.05 | Fibers placed in wood frames | Loose | 0.3726 | Cotton Burr | 101.8 | 0.387085 | 0.06817 | NIST SRD 81 API |
| cotton burr | 303 | 9/4/1942 | 17.02 | 1.008 | 15.6 | — | Board | 0.4346 | Cotton Burr | 98.71 | 0.331864 | 0.058445 | NIST SRD 81 API |
| cotton burr | 306 | 9/25/1942 | 19.89 | 0.9995 | 6 | Cotton, defiberated burrs, placed in wood frames | Loose | 0.3484 | Cotton Burr | 101.15 | 0.413972 | 0.072905 | NIST SRD 81 API |
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