Rigid Foam Insulation Board R Value

This product typically has an r value of 3 6 to 4 0 per inch of thickness. Expanded polystyrene foam board 1 inch thick 3 8 4 4. It is offered in multiple thicknesses and dimensions in both square edged and tongue and groove joints.

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Insulfoam rigid foam is a high performance built to spec sheathing insulation that provides superior r value and moisture resistance.

Rigid foam insulation board r value.

A popular rigid insulation choice xps features an initial r value of r 5 per inch. Extruded polystyrene foam board 1 inch thick 5. 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. In severe cold xps panels do see an increase to their r values.

That said the long term r values of this foam board decline over time. Rmax r matte plus 3 1 2 in. Rigid insulation is usually made up of fibrous materials or plastic foams. The fibrous materials such as wood cane or vegetable fibers are mixed with fillers and binders to form insulation boards.

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. 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. 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.

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