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Insulation R Values: cellular polystyrene extruded
784 to 905
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cellular polystyrene extruded | 784 | 10/16/1950 | 21.97 | 0.9823 | 1.441 | — | Board | 0.328 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 120.68 | 0.439719 | 0.077439 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
| cellular polystyrene extruded | 903 | 6/3/1953 | 23.59 | 1.0067 | 1.792 | Pore diameter: 0.25 mm to 0.5 mm | Board | 0.2886 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 71.86 | 0.49975 | 0.088011 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
| cellular polystyrene extruded | 904 | 6/4/1953 | 24.33 | 1.0066 | 1.792 | Pore diameter: 0.25 mm to 0.5 mm | Board | 0.2631 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 40.45 | 0.548187 | 0.096541 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
| cellular polystyrene extruded | 905 | 6/8/1953 | 22.08 | 1.0041 | 1.797 | Pore diameter: 0.25 mm to 0.5 mm | Board | 0.3401 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 126.63 | 0.424075 | 0.074684 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
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