Polystyrene Pods or waffle pods, are used in residential concrete slabs. Lightweight, expandable, polystyrene pods acts as a void former for concrete slabs on ground. Strong and dimensionally stable, polystyrene Pods are available in 1100 x 1100 mm in variable heights. Polystyrene pods or waffle pods are used in conjunction with OneSteel Reinforcing's ONESLAB® fixed price per m² residential concrete slab package. Talk to your local branch for more details.