Foam Board Insulation R Value

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.

Foam board insulation r value.

Fiberglass insulation is less than half the price of rigid foam insulation when calculated by r value per square foot. Used in this way the foam lowers the loss of energy through framing members a phenomenon called thermal bridging and increases the overall r value of the roof or wall assembly. Extruded polystyrene foam board 1 inch thick 5. 0 56 in x 4 ft x 8 ft.

Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are very effective. Rigid foam insulation packs a lot of r value into a relatively thin package. It is often used as a layer of continuous insulation on exterior walls and in the roof. R values vary depending on many factors including the mean temperature at which the test is conducted and the age of the sample at the time of testing.

Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior. 0 56 in x 4 ft x 8 ft 1 unfaced polystyrene foam board insulation item 511270 model 100000050497. For example insulating a 10 square foot wall area to r 15 costs about 3 40 to 4 00 with fiberglass insulation while a comparable r value for rigid foam costs roughly 10. 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. Xps has an r value of 4 5 to 5 0 per inch of thickness. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry.

Typically a higher insulation r rating means better climate control and better energy efficiency for your home. This is an even more dense and more expensive foam board insulation. Polyisocyanurate foam board 1 inch thick. There is also less waste with fiberglass insulation.

This is the product that i typically use to insulate basement walls. Kingspan insulation r 3 common. 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. Expanded polystyrene foam board 1 inch thick 3 8 4 4.