Foam Board Insulation R Value

This is an even more dense and more expensive foam board insulation.

Foam board insulation r value.

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. Fiberglass insulation is less than half the price of rigid foam insulation when calculated by r value per square foot. Rigid foam insulation packs a lot of r value into a relatively thin package. Polyisocyanurate foam board 1 inch thick.

Rmax r matte plus 3 1 2 in. Xps has an r value of 4 5 to 5 0 per inch of thickness. 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. This is the product that i typically use to insulate basement walls.

It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat. There is also less waste with fiberglass insulation. Kingspan insulation r 3 common. It is often used as a layer of continuous insulation on exterior walls and in the roof.

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. 0 56 in x 4 ft x 8 ft. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. Extruded polystyrene foam board 1 inch thick 5.

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 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. A higher insulation r value usually means a higher price point as well. 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.

This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry. Expanded polystyrene foam board 1 inch thick 3 8 4 4. 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. 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.