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.

0 56 in x 4 ft x 8 ft 1 unfaced polystyrene foam board insulation item 511270 model 100000050497. This is the product that i typically use to insulate basement walls. It is often used as a layer of continuous insulation on exterior walls and in the roof. 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.

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. Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are very effective. Rmax r matte plus 3 1 2 in. Expanded polystyrene foam board 1 inch thick 3 8 4 4.

0 56 in x 4 ft x 8 ft. Kingspan insulation r 3 common. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat.

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. A higher insulation r value usually means a higher price point as well. Extruded polystyrene foam board 1 inch thick 5. 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.

Fiberglass insulation is less than half the price of rigid foam insulation when calculated by r value per square foot. 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. Xps has an r value of 4 5 to 5 0 per inch of thickness.

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. For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed. There is also less waste with fiberglass insulation. This is an even more dense and more expensive foam board insulation.