Panel Calculator Calculate = Add to Basket config = { calculator: 'board-cal', label: 'panels', coverage: 0.42, //simples: simpleqtys, //simple Trig: $j ('.super-attribute-select') }; board Cal.init (config); These all in one easy to fit panels (1200mm x 350mm x 50mm) are an ideal solution to fix between existing joists onto battens, they can also be fitted between battens on concrete subfloors, giving you a fast inexpensive solution for installing our pipework (pipework is set at 200mm centers). Made from EPS (Expanded Polystyrene). These panels replace the need for using separate spreader plates & separate foil faced insulation systems.