| Layer | Material | Thermal Resistance (m2 K/W) | Thickness (m) | Conductivity: λ (W/m/˚C.) | Cap.Cal: C (J/kg・˚C) | Density: ρ (kg/m3) |
| 1 2 3 | Sheet metal Airspace Wood | - 0.180 - | 0.002 0.400 0.005 | 70 - 0.100 | 800 100 990 | 7000 1000 1200 |