Sample data from Engineering Database — 375 reference tables, deterministic calculators, and Engineering AI. Sign up free
Insulation R Values: nbs fibrous glass
1756 to 1774
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 | uncertainty |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| nbs fibrous glass | 1756 | 10/2/1968 | 21.67 | 0.9707 | 9.248 | Lot 1961 | Board | 0.2013 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 0.07 | 0.716482 | 0.12618 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1761 | 11/13/1968 | 22.83 | 0.4764 | 10.06 | Lot 1959, ½ in. | Board | 0.2567 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 129.78 | 0.561854 | 0.098948 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1762 | 11/14/1968 | 24.29 | 0.4759 | 10.07 | Lot 1959, ½ in. | Board | 0.2333 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.03 | 0.618208 | 0.108873 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1763 | 11/18/1968 | 24.43 | 0.9676 | 8.054 | Lot 1961 | Board | 0.2263 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.07 | 0.637331 | 0.11224 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1768 | 12/2/1968 | 24.29 | 0.4806 | 11.22 | Lot 1959, ½ in. | Board | 0.2399 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75 | 0.6012 | 0.105877 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1769 | 12/3/1968 | 24.32 | 0.963 | 8.78 | Lot 1961 | Board | 0.2305 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 74.98 | 0.625718 | 0.110195 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1771 | 2/17/1969 | 23.07 | 0.9565 | 9.011 | Lot 1961 | Board | 0.253 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 130.12 | 0.570071 | 0.100395 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1772 | 2/20/1969 | 24.44 | 0.9577 | 9 | Lot 1961 | Board | 0.2299 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.04 | 0.627351 | 0.110483 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1773 | 2/21/1969 | 25.54 | 0.9575 | 9.002 | Lot 1961 | Board | 0.2112 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 32.33 | 0.682897 | 0.120265 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
| nbs fibrous glass | 1774 | 3/3/1969 | 24.49 | 0.9462 | 8.6 | Lot 1961 | Board | 0.2259 | Owens Corning Fiberglas Corp. | NBS Fibrous Glass | 75.14 | 0.638459 | 0.112439 | NIST SRD 81 API | ASTM C 177 | SRM® 1450 Series | 1 |
What else is in Engineering Database
Iron Engine ↗Engineering AI at ironengine.ai
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators