Dow Foam Board Insulation R Value

Choose from three types of insulating foam core boards for wall insulation.

Dow foam board insulation r value.

R value determined by astm c518. 2 in x 4 ft x 8 ft. Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation. Each type comes with unique advantages.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. Values at yield or 10 deflection whichever occurs first. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. Data ranges from 0 00 to value shown due to the level of precision of the test method.

Blue board can be used both on exterior and interior walls to give you a continuous insulation barrier that can increase effective r value of the wall by up to 20. 2 r means resistance to heat flow. 2 vertical compressive strength is measured at 10 percent deformation or at yield whichever occurs first. The higher the r value the greater the insulating power.

For polyurethane pur and polyisocyanurate pir foam insulation systems our high performance surfactants boost energy efficiency. 1r values are consistent with criteria of astm c578 and requirements of ftc r value rule 16 cfr part 460. For insulated panels and boards we offer polyurethane systems that are lightweight increase energy efficiency improve longevity and meet the most demanding industry requirements. Value at yield or 5 whichever occurs first.

Since styrofoam brand extruded polystyrene foam insulations are visco elastic materials adequate design safety factors should be used to prevent long term creep and fatigue deformation. 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. 4based on 1 25 mm thickness.