Foolproof
Polystyrene is also provided with drainage grooves. Thus if there is water leakage from the foundation wall, this water should be drain under the panel to the floor drain. Type II expanded polystyrene is waterproof and does not rot. It has a compressive strength of 15lbs/sq.in. (2200 lbs / sq,) and is an inflated using vapor so it does not contain CFC’S or HCFC’S. The panels feature a unique tongue and groove sealed system, which eliminates cold leaks in joints.