Dow Foam Board Insulation R Value

Shop dow r 10 common.

Dow foam board insulation r value.

Choose from three types of insulating foam core boards for wall insulation. Values at yield or 10 deflection whichever occurs first. Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.

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. 2 in x 4 ft x 8 ft. The higher the r value the greater the insulating power. 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. 1r values are consistent with criteria of astm c578 and requirements of ftc r value rule 16 cfr part 460. 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 vertical compressive strength is measured at 10 percent deformation or at yield whichever occurs first.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. Value at yield or 5 whichever occurs first. 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. R value determined by astm c518.

2 r means resistance to heat flow. Each type comes with unique advantages. For polyurethane pur and polyisocyanurate pir foam insulation systems our high performance surfactants boost energy efficiency.