ฉนวนกันความร้อน
Standard size
| Thickness | Width | Length | ||||||
| 3 mm. | 60 mm | 50 m | 100 m | |||||
| 3,4,5 mm. | 90 mm | 50 m | 100 m | |||||
| 5 mm. | 100 mm | 50 m | 100 m | |||||
| 10 mm. | 120 mm | 50 m | 100 m | |||||
The resistance to heat transfer.
| R-Value | M2.k./W | 5 mm = 3.35 | 10 mm = 3.52 | |||||
| Hr.ft2of/btu | 19.02 | 20 | ||||||
| Calculation is made according to ashrae 2001: R-Value : means resistance to heat flow (Under typical roof) | ||||||||