Roof Insulation Rigid R Value

Rigid insulation is usually made up of fibrous materials or plastic foams.

Roof insulation rigid r value.

Some products have reinforced facing to make them sturdier. Jump to specific section. I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. A rigid roof insulation board with high thermal efficiency johns manville r panel is compatible with multiple types of membrane systems.

All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. When it comes to insulation performance the difference is in the details. Choose this option for areas that need a good amount of strength and water resistance. R3 r18 r21 total roof r value.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. This material offers the highest r values about r 6 to 6 5. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. Know exactly how much you need with our project calculators.

R value measures how well certain building insulation materials can resist heat. R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. It provides about r 5 per inch. 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.

Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. It provides r values that range from 3 6 to 4 2 per inch. The increase r21 r3 exactly 18 the value by which you are increasing the r value.