Roof Insulation Rigid R Value

When it comes to insulation performance the difference is in the details.

Roof insulation rigid r value.

Some products have reinforced facing to make them sturdier. Choose this option for areas that need a good amount of strength and water resistance. 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 higher the r value the greater the insulation performance.

When determining how much insulation you need don t guesstimate calculate. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. It provides r values that range from 3 6 to 4 2 per inch. R value measures how well certain building insulation materials can resist heat.

This material offers the highest r values about r 6 to 6 5. The percentage increase increase increase original number 100. Rigid insulation is usually made up of fibrous materials or plastic foams. Jump to specific section.

The increase r21 r3 exactly 18 the value by which you are increasing the r value. Know exactly how much you need with our project calculators. 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. 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.

All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. It provides about r 5 per inch. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency.