This XPS Water Underfloor Heating Grooved Insulation Board foiled 20mm for 16mm pipe is a high-quality unit that will enhance the heating system of your home. With a thermal conductivity of 0.027 ~ 0.03 and a density of 38 ~ 40, this aluminium board is perfect for underfloor heating systems. It has a compressive strength at 10% deflection of >_ 300 and a tensile strength of >_ 300 kPa. The board has a coefficient of linear thermal expansion of 0.07 and a temperature limit of -50C and +75C in Celsius. It also has a water absorption of <=1.00% and a material of aluminium. This unit is ideal for those who are looking for a reliable and efficient heating system for their home.