R Value Rigid Insulation Roof

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.

R value rigid insulation roof.

Jump to specific section. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. 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.

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 insulation is usually made up of fibrous materials or plastic foams. It s not about how much heat the insulation retains but how slowly it allows heat to move through it. Atlas acfoam products contain a polyiso core which achieves higher effective r values the capacity to resist heat flow with minimal material thickness.

A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer. The higher the r value the better a material performs as a thermal insulator. When determining how much insulation you need don t guesstimate calculate. The slower the better.

The higher the r value the greater the insulation performance. Know exactly how much you need with our project calculators.