Type i thermal resistance.
Dow extruded polystyrene board insulation type iv.
Product information general purpose insulation for roofing wall and foundation applications requiring 25 psi minimum compressive strength greenguard type iv 25 psi insulation board is an ideal exterior insulation meeting your needs for multiple applications.
Classifications for the five types of polystyrene insulation are as follows.
To compare the old gsa specs with the new please refer to tables 1 and 2.
Extruded polystyrene xps rigid foam insulation energy saving moisture resistant xps insulation astm c 578 type iv 25 psi minimum description owens corning foamular 250 extruded polystyrene xps insulation is a closed cell moisture resistant rigid foam board well suited to meet the needs for a wide variety of building applications.
Foamular extruded polystyrene xps insulation astm c578 types and physical properties this table outlines the basic physical property requirements of astm c5781 and foamular xps insulation compliance.
Styrofoam brand scoreboard extruded polystyrene foam insulation is an extruded polystyrene foam insulation board that is scored longitudinally on 16 and 24 centers making it easy to size to commonly used widths cut and install.
The products are organized left to right in ascending compressive strength.
Its extruded polystyrene xps construction provides superior moisture resistance.