Foam Board Insulation R Value

For every type and material of insulation check the r value per inch of thickness that the manufacturer has listed.

Foam board insulation r value.

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. This is the product that i typically use to insulate basement walls. Xps has an r value of 4 5 to 5 0 per inch of thickness.

Rigid foam insulation packs a lot of r value into a relatively thin package. Extruded polystyrene foam board 1 inch thick 5. A higher insulation r value usually means a higher price point as well. Because rigid foam plastic insulation products are not all aged in accordance with the same standards it is useful to publish comparison r value data.

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. 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. Polyisocyanurate foam board 1 inch thick. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat.

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. 0 56 in x 4 ft x 8 ft. There is also less waste with fiberglass insulation.

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. 0 56 in x 4 ft x 8 ft 1 unfaced polystyrene foam board insulation item 511270 model 100000050497. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry. Kingspan insulation r 3 common.

Expanded polystyrene foam board 1 inch thick 3 8 4 4. Fiberglass insulation is less than half the price of rigid foam insulation when calculated by r value per square foot. Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are very effective. It is often used as a layer of continuous insulation on exterior walls and in the roof.