Rigid Foam Insulation Board R Value

Rmax r matte plus 3 1 2 in.
Rigid foam insulation board r value. Extruded polystyrene foam board 1 inch thick 5. A popular rigid insulation choice xps features an initial r value of r 5 per inch. It s made of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer. That said the long term r values of this foam board decline over time.
Expanded polystyrene foam board 1 inch thick 3 8 4 4. Polyisocyanurate foam board 1 inch thick. R 3 2 polyisocyanurate rigid foam insulation board r matte plus 3 thermasheath 3 is rigid foam r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board. Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart.
Insulfoam rigid foam is a high performance built to spec sheathing insulation that provides superior r value and moisture resistance. This product typically has an r value of 3 6 to 4 0 per inch of 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. It is offered in multiple thicknesses and dimensions in both square edged and tongue and groove joints.
Rigid insulation is usually made up of fibrous materials or plastic foams. In severe cold xps panels do see an increase to their r values.