Insulation R Values: plaster
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) | test method |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| plaster | 1076 | 9/6/1957 | 18.48 | 0.971 | 51.8 | Perlite plaster, 1 bag gypsum (100 lb): 2½ ft<sup>3</sup> perlite | Block | 1.6884 | Plaster | 124.18 | 0.085423 | 0.015044 | ASTM C 177 |
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