Fortefy Thermo HDS High Density Rigid insulation is a closed cell expanded polystyrene (EPS) insulation that meets or exceeds the requirements of CAN/ULC-S701, Standard for Thermal Insulation, Polystyrene, Boards and Pipe Covering.
The closed cell structure of EPS insulation resists water absorption resulting in retention of its R-value in applications where severe temperature differentials occur.
With compressive strengths ranging from 20 PSI to 40 PSI, the HDS line of insulation is ideal for use in applications where heavy live and dead loading is expected.