Eps Foam R Value Per Inch

In november 1992 nrca issued another bulletin in which it reaffirmed recommending an in service r value of 5 6 per inch of foam thickness for hcfc blown polyisocyanurate board products.

Eps foam r value per inch.

Shop eps insulation shop polyiso insulation shop xps insulation sort by. Manufactured densities of eps and the temperature at which the reported r value was measured impact the true r value of eps. Eps is used under roofing over foundation walls and beneath siding. Value at yield or 5 whichever occurs first.

This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Data ranges from 0 00 to value shown due to the level of precision of the test method. Expanded polystyrene insulation is similar to the foam used for packing peanuts and it s typically used for insulated concrete forms also knows as icf s. When certain types of plastic facers are applied the composite product can feature an r value of up to 3 8 at one inch.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. The higher the r value the higher the insulating capability. R5 3 r6 1 product length ft 10 ft 1 2 ft 1 8 ft 2 product width in. It also is the least expensive.

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. The industry standard mean temperature for measuring r value is 75of. In addition to providing energy efficiency eps without film facers has a perm rating of up to 5 0. R 5 scored square edge rigid foam board insulation sheathing model 20we view the owens corning exterior.

The r value at 180 day real time age and 75ºf mean temperature is commonly used to compare products and is the value printed on the product. Falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation. In the manufacturing process for polyisocyanurate blowing agents defuse from the cellular structure of the foam for many years after manufacture.

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. Owens corning foamular 150 1 in. Eps insulation features an average r value of 3 6 per inch. It is denser than eps and.

Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch. Eps is the eifs industry standard due to its established performance and overall value when compared with other board insulation options. Eps is suitable for ground contact and can be treated to resist insects.