Rigid Foam Insulation Board R Value

This product typically has an r value of 3 6 to 4 0 per inch of thickness.

Rigid foam insulation board r value.

Extruded polystyrene foam board 1 inch thick 5. 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. Rmax r matte plus 3 1 2 in. In severe cold xps panels do see an increase to their r values.

Rigid insulation is usually made up of fibrous materials or plastic foams. That said the long term r values of this foam board decline over time. The fibrous materials such as wood cane or vegetable fibers are mixed with fillers and binders to form insulation boards. A popular rigid insulation choice xps features an initial r value of r 5 per inch.

Expanded polystyrene insulation is similar to the foam used for packing peanuts and it s typically used for insulated concrete forms also knows as icf s. It is offered in multiple thicknesses and dimensions in both square edged and tongue and groove joints. Expanded polystyrene foam board 1 inch thick 3 8 4 4. For example after just 5 years an xps board will see its r value fall by 10 and even more going forward.

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. 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.