R Value Rigid Insulation Roof

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.

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. The slower the better. Know exactly how much you need with our project calculators. R value is used as a measurement of the effectiveness of thermal insulating materials.

R value measures how well certain building insulation materials can resist heat. It s not about how much heat the insulation retains but how slowly it allows heat to move through it. When determining how much insulation you need don t guesstimate calculate. Rigid insulation is usually made up of fibrous materials or plastic foams.

Polyiso is the only foam roof insulation that can be used without the need for an additional thermal barrier. The higher the r value the greater the insulation performance. The higher the r value the better a material performs as a thermal insulator. A rigid roof insulation board with high thermal efficiency johns manville r panel is compatible with multiple types of membrane systems.

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