Foam Board Insulation R Value

0 56 in x 4 ft x 8 ft 1 unfaced polystyrene foam board insulation item 511270 model 100000050497.

Foam board insulation r value.

This is the product that i typically use to insulate basement walls. 0 56 in x 4 ft x 8 ft. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry.

Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are very effective. Xps has an r value of 4 5 to 5 0 per inch of thickness. Rmax r matte plus 3 1 2 in. A higher insulation r value usually means a higher price point as well.

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. 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. Rigid foam insulation packs a lot of r value into a relatively thin package. 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.

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. Extruded polystyrene foam board 1 inch thick 5. Kingspan insulation r 3 common. Polyisocyanurate foam board 1 inch thick.

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. 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. 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. Typically a higher insulation r rating means better climate control and better energy efficiency for your home.

Expanded polystyrene foam board 1 inch thick 3 8 4 4. It is often used as a layer of continuous insulation on exterior walls and in the roof. There is also less waste with fiberglass insulation. 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.