Warmboard is a very effective internal insulation solution for new and existing builds. It is an insulated panel of Xtratherm PIR insulation bonded to 12.5mm plasterboard. Also known as Warmboards, it is used to improve the thermal performance of walls in new build and refurbishment projects by internal lining. This product can help save on energy bills. It is available in an 8ft x 4ft Sheet size, which is equivalent to 2.4mt x 1.2mt. The thickness of the product is 29.5mm, including the 12.5mm plasterboard.