LAMBDABOARD° laminated polyisocyanurate core board with a minimum core density of 34kg/m³, minimum thickness of 30mm; in widths of 1,220mm with a 1,25 (Km²/W) R-Value.  Finish shall be White Mineral and Mineral Natural laminated on each side, with a 9mm Plaster board laminated on one side using Rigibond 5 adhesive. The Lambdaboard shall be installed using nylon anchors (approx.  4 per m²) counter sunk into the board with a fibre tape used on the joints and on the fixings. Skimming of the board can be done as per manufactures specification.