Panel Calculator Calculate = Add to Basket config = { calculator: 'board-cal', label: 'panels', coverage: 2.88, simples: simpleqtys, simple Trig: $j ('.super-attribute-select') }; board Cal.init (config); Please Note: Minimum order quantity for this product is 15 boards (50mm) / 10 boards (75mm) / 8 boards (100mm). Celotex GA4075 is multi-purpose insulation board targeted at 'cut to fit' applications between rafters & joists, but its applications don't end there, this board has long been at the heart of Celotex's vast range & provides numerous thermal insulation solutions. This unique board allows excellent lowered U-values with just a single layer that has previously been hard to achieve, & with its rigid foam core comprising of polyisocyanurate (PIR) its foil facing sheets finish this product to make it perfect for any refurbishment or new build project. It has long been at the heart of the Celotex product range providing the user with a range of thermal insulation solutions With