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Insulation R Values: cellular polystyrene extruded
422 to 783
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 | 422 | 4/24/1945 | 18.05 | 1.0083 | 2.5 | Light grey, pore diameter: 0.3 mm to 0.5 mm | Board | 0.267 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 88.11 | 0.540179 | 0.095131 | NIST SRD 81 API | ASTM C 177 | Dow Q 103.9 |
| cellular polystyrene extruded | 423 | 4/26/1945 | 18.75 | 0.9774 | 2 | Dark grey, pore diameter: 1.8 mm to 2.2 mm | Board | 0.3409 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 88.84 | 0.42308 | 0.074509 | NIST SRD 81 API | ASTM C 177 | Dow Q 103.8 |
| cellular polystyrene extruded | 424 | 5/1/1945 | 18.36 | 1.0788 | 1.6 | White pigment, pore diameter: 0.8 mm to 1.2 mm | Board | 0.2812 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 88.45 | 0.512901 | 0.090327 | NIST SRD 81 API | ASTM C 177 | Dow Q 103.7 |
| cellular polystyrene extruded | 679 | 6/20/1949 | 23.87 | 1.0096 | 1.955 | Pore diameter: 0.5 mm to 0.8 mm | Board | 0.3023 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 71.08 | 0.477102 | 0.084022 | NIST SRD 81 API | ASTM C 177 | Dow Q 103.13 |
| cellular polystyrene extruded | 681 | 6/22/1949 | 23.79 | 1.0597 | 1.575 | Pore diameter: 0.5 mm to 1.5 mm | Board | 0.3297 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 71 | 0.437452 | 0.07704 | NIST SRD 81 API | ASTM C 177 | Dow Q 103.7 |
| cellular polystyrene extruded | 682 | 6/23/1949 | 23.51 | 0.9754 | 0.262 | Brown pigment, pore diameter: 0.5 mm to 1.0 mm | Board | 0.4371 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 70.94 | 0.329965 | 0.05811 | NIST SRD 81 API | ASTM C 177 | Dow |
| cellular polystyrene extruded | 780 | 10/10/1950 | 24.56 | 0.9828 | 1.443 | — | Board | 0.2811 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 69.48 | 0.513084 | 0.090359 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
| cellular polystyrene extruded | 781 | 10/11/1950 | 26.46 | 0.9825 | 1.45 | — | Board | 0.2589 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 42.06 | 0.55708 | 0.098107 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
| cellular polystyrene extruded | 782 | 10/12/1950 | 26.78 | 0.9813 | 1.452 | — | Board | 0.2591 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 42.22 | 0.55665 | 0.098032 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
| cellular polystyrene extruded | 783 | 10/13/1950 | 21.71 | 0.9818 | 1.455 | — | Board | 0.3277 | Dow Chemical Co. | Cellular Polystyrene, Extruded | 120.23 | 0.440122 | 0.07751 | NIST SRD 81 API | ASTM C 177 | Styrofoam® |
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