Rigid Roof Insulation R Value Per Inch

All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. 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. The same insulation will hold more heat the thicker it is installed.

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Polyisocyanurate also known as polyiso is seen in all kinds of commercial building applications and more recently with residential building projects.

Rigid roof insulation r value per inch.

When it comes to insulation performance the difference is in the details. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. 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. Most often used in roofing applications average cost of 70 per sq.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. The reflective foil facing makes it an excellent insulation board when radiant heat is involved. Asbestos corrugated paper pipe insulation. Eight inches of poor quality.

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.

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