Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness.
Rigid roof insulation r value per inch.
Estimated r value of asbestos insulation.
Polyiso is typically used with a foil facing and it has an r value of 7 0 to 8 0 per inch of thickness.
Most often used in roofing applications average cost of 70 per sq.
The reflective foil facing makes it an excellent insulation board when radiant heat is involved.
When it comes to insulation performance the difference is in the details.
All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered.
Asbestos corrugated paper pipe insulation.
For a 1 in thick panel may vary based on region standard r value of r 5 8 per inch the manufacturing process starts with liquid foam not recyclable has to be sprayed against a substrate to form a rigid panel so all iso panels are faced.
Rigid insulation r value by comparison usually ranges from r 4 0 to 6 5 and may get as high as r 8 7 depending on the insulation material.
With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness.