Abstracted from ASHRAE (1989), with permission
Building BoardDescription | Density |
Conductivity |
Gypsum or plasterboard, 0.5 in | 50 |
1.11 |
Plywood (Douglas fir) | 34 |
0.80 |
Hardboard, Medium-density | 50 |
0.73 |
Hardboard, High-density, service temp. service underlay | 55 |
0.82 |
Hardboard, High-density. standard tempered | 63 |
1.00 |
Particleboard, Low-density | 37 |
0.54 |
Particleboard, Medium-density | 50 |
0.94 |
Particleboard, High-density | 62.5 |
1.18 |
Description | Density |
Conductivity |
Cellular glass | 8.5 |
0.35 |
Glass fiber, organic bonded | 4 to 9 |
0.25 |
Expanded perlite, organic bonded | 1.0 |
0.36 |
Expanded rubber (rigid) | 4.5 |
0.22 |
Expanded polystyrene extruded, Cut cell surface | 1.8 |
0.25 |
Expanded polystyrene extruded, Smooth skin surface | 1.8 to 3.5 |
0.20 |
Expanded polystyrene, molded beads | 1.0 |
0.20 |
1.25 |
0.25 |
|
1.5 |
0.24 |
|
1.75 |
0.24 |
|
2.0 |
0.23 |
|
Cellular polyurethane (R11 exp.)(unfaced) | 1.5 |
0.16 |
Polyisocynaurate (R11 exp.) | 2 |
0.14 |
Mineral fiber with resin binder | 15 |
0.29 |
Mineral fiberboard, wet-felted, Core or roof insulation | 16 to 17 |
0.34 |
Mineral fiberboard, wet-felted, Acoustical tile | 18 |
0.35 |
Description | Density |
Conductivity |
Cellulosic insulation (milled paper or wood pulp) | 2.3 to 3.2 |
0.27 to 0.32 |
Sawdust or shavings | 8 to 15 |
0.45 |
Wood fiber, softwoods | 2 to 3.5 |
0.30 |
Perlite, expanded | 5 to 8 |
0.37 |
Vermiculite, exfoliated | 7 to 8.2 |
0.47 |
Description | Density |
Conductivity |
Cement motor | 116 |
5.0 |
Lightweight aggregates including expanded shale, clay or slate; expanded slags; cinders; pumice; vermiculite; also cellular concretes | 120 |
5.2 |
100 |
3.6 |
|
80 |
2.5 |
|
60 |
1.7 |
|
40 |
1.15 |
|
Perlite, expanded | 40 |
0.93 |
Sand and gravel or stone aggregate (oven-dried) | 140 |
9.0 |
Sand and gravel or stone aggregate (not dried) | 140 |
12.0 |
Stucco | 116 |
5.0 |
Description | Density |
Conductivity |
Brick, common | 120 |
5.0 |
Brick, face | 130 |
9.0 |
Siding material (on flat surface)
Description | Density |
Conductivity |
Hardboard siding, 7/16 in | 40 |
0.653 |
Description | Density |
Conductivity |
Maple, oak, and similar hardwoods | 45 |
1.10 |
Fir, pine, etc. | 32 |
0.80 |