Duct Wrap Insulation - Thermal Resistance
Heat flow thermal resistance of unfaced and faced duct wrap insulation.
Faced insulation has a vapor paper or plastic facing retarder. Unfaced insulation lacks the retarder.
The vapor retarder helps to prevent mold and mildew. Faced insulation should be used in exterior walls and attic ceilings. Check the local building codes for the vapor retarder requirements.
Thermal resistance to heat flow for faced and unfaced duct wrap insulation:
| Type |
Insulation Density | Insulation Thickness (in) | R-value Installed (h ft2 oF / Btu) | |
|---|---|---|---|---|
| Unfaced | Faced | |||
| 50 | 0.5 | 1 1/2 | 3.6 | |
| 2 | 4.8 | |||
| 3 | 7.3 | |||
| 75 | 0.75 | 1 | 2.6 | 3.8 |
| 1 1/2 | 3.9 | 5.0 | ||
| 2 | 5.2 | 6.3 | ||
| 3 | 7.8 | 7.5 | ||
| 100 | 1.0 | 1 | 2.8 | |
| 1 1/2 | 4.2 | |||
| 2 | 5.6 | |||
| 150 | 1.5 | 1 | 3.0 | |
| 1 1/2 | 4.5 | |||
- 1 h ft2 oF / Btu = 0.18 m2 oC / W
