POLYISOCYANURATE
R-5.7 per inch, aged value
Air Barrier: Only when foil faced
Vapor Barrier: Only when foil faced
Below Grade: No
Suitability: Exterior
Sources:
http://www.energyauditingblog.com/what-is- polyiso/
R-5.7 per inch, aged value
Air Barrier: Only when foil faced
Vapor Barrier: Only when foil faced
Below Grade: No
Suitability: Exterior
- It is a Closed Cell Foam, created in a similar fashion as XPS
- Shrinks over time, so it must be properly taped if it is to serve as a Air/Vapor Barrier
Sources:
http://www.energyauditingblog.com/what-is- polyiso/