The XPS 400 low profile overlay boards provide a simple solution for installing underfloor heating without lifting your floor. The panels are secured onto the existing floor making them ideal for retrofit installations. Made from extruded polystyrene (XPS), the XPS 400 has a thermal resistance of 0.9 m²·K/W. The boards are compatible with all floor coverings, including laminate, carpet, tiles, vinyl, and engineered wood. Overlay boards are 20mm thick and have a compressive strength of 400 kPa. They provide a durable and efficient solution for retrofitting underfloor heating systems. Each board houses a 16mm pipe spaced at 150mm intervals and features pipe channels, 180° turns, and return channels. The panels are secured with adhesive, easy to cut, and simple to install. The overlay boards feature a 200-micron thick aluminium foil, which enhances heat distribution across the floor surface, enabling heat-up times as quick as 30 minutes. Key Features: Low Profile: The 20mm design ensures minimal height increase on existing floors. Durable: With a compressive strength of 400 kPa, the boards can withstand heavy loads without compromising performance. Foil-Coated Insulation: A 200-micron aluminium coating optimises heat distribution and system efficiency. Easy Installation: Pre-grooved channels (spaced at 150mm) simplify installation and pipe routing. Versatile Compatibility: Suitable for use with laminate, carpet, tiles, vinyl, and engineered wood floors. Efficient Heat Distribution: The aluminium foil maximises heat output and comfort across the floor. *PLEASE NOTE: THIS PRODUCT HAS A MINIMUM ORDER QUANTITY OF 10 BOARDS* Download Data Sheet