The robust SOLID TERMO loft ladder is the basic model of the loft ladder with a 26 mm thick sealed hatch. The heat transfer coefficient of the hatch is 1.22 W/m2*K. To increase safety, the SOLID TERMO loft ladder has been equipped with a handrail for easier entry and with non-slip feet. The all-metal ladder allows a maximum load of 190 kg. The ladder structure has been powder-coated, giving it a modern look and ensuring durability for many years. Ud - hatch centre coefficient.