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Insulation R Values: felt
1921 to 95
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| felt | 1921 | 8/5/1975 | 24.53 | 0.8943 | 9.432 | Sample 0.5 each, white, stacked for 1 in. | Blanket | 0.3852 | (Dynatech Corporation) | Felt | 75.57 | 0.374423 | 0.06594 | NIST SRD 81 API | ASTM C 177 |
| felt | 95 | 9/9/1937 | — | 0.875 | 24.5 | Felt pipe covering, layered | Blanket | 0.434 | — | Felt | 97.9 | 0.332322 | 0.058525 | NIST SRD 81 API | — |
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