Our Fastwarm XPS Insulation Boards are specially designed for use with Fastwarm electric underfloor heating systems, providing an optimal insulation layer over concrete and screeded substrates. Constructed from high-density extruded polystyrene (XPS) with a reinforced polymer-cement coating, these boards improve heat retention, reduce energy costs, and enhance heating efficiency. Engineered for durability, they can withstand compression strengths of up to 30 tonnes per m², making them an ideal solution for both residential and commercial projects. Despite their exceptional strength, these boards remain ultra-lightweight, easy to handle, and simple to cut, allowing for a hassle-free installation. Moisture-resistant and highly efficient, Fastwarm XPS Insulation Boards offer a cost-effective and long-lasting solution for maximizing the performance of your underfloor heating system. XP insulation boards are waterproof, approved by Ultra Tile adhesive manufacturers, have super high Insulation Values per mm, excellent sound insulation, and a thermal conductivity value of 0.034 W/mK.