Dow Polystyrene Insulation Board R Value

Dow invented a process for extruding polystyrene to achieve a closed cell foam that resists moisture.

Dow polystyrene insulation board r value.

Resistance to the flow of heat is measured in r value the higher the r value the harder it is for heat to get through. Dow styrofoam scoreboard insulation board blue board 4 ft by 8 ft sheet 1 5 thick r value 7 5 a nonstructural rigid board insulation manufactured of extruded polystyrene foam xps. 2 in x 4 ft x 8 ft. Shop dow r 10 common.

Ask your seller for the fact sheet on r value. Since styrofoam brand extruded polystyrene foam insulations are visco elastic materials adequate design safety factors should be used to prevent long term. R value determined by astm c518. R means resistance to heat flow.

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. Styrofoam extruded polystyrene insulation is rated at an r value of 5 0 per inch at 75 f. Since styrofoam brand extruded polystyrene foam insulations are visco elastic materials adequate. How does it work.

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. 2 vertical compressive strength is measured at 10 percent deformation or yield whichever occurs first.