Dow Polystyrene Insulation Board R Value

The higher the r value the greater the insulating power.

Dow polystyrene insulation board r value.

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. 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.

Styrofoam extruded polystyrene insulation is rated at an r value of 5 0 per inch at 75 f. 2 vertical compressive strength is measured at 10 percent deformation or yield whichever occurs first. Shop dow r 10 common. 2 vertical compressive strength is measured at 10 percent deformation or at yield whichever occurs first.

Dow invented a process for extruding polystyrene to achieve a closed cell foam that resists moisture. Ask your seller for the fact sheet on r value. 2 in x 4 ft x 8 ft. Since styrofoam brand extruded polystyrene foam insulations are visco elastic materials adequate.

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. Dow scoreboard is scored over 16 and 24 making it. Since styrofoam brand extruded polystyrene foam insulations are visco elastic materials adequate design safety factors should be used to prevent long term.