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Insulation R Values: perlite
638 to 870
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| perlite | 638 | 11/19/1948 | 23.99 | 0.9781 | 14.56 | Specimens placed in wood frames (TUC-96D) | Loose | 0.457 | — | Perlite | 39.68 | 0.315597 | 0.05558 | NIST SRD 81 API | ASTM C 177 | — |
| perlite | 870 | 12/8/1952 | 22.38 | 1.01 | 5.439 | Specimens placed in wood frames | Loose | 0.3852 | Atlantic Perlite Co. | Perlite | 125.49 | 0.374423 | 0.06594 | NIST SRD 81 API | ASTM C 177 | Panacalite |
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