The HECO product range includes the HECO-TOPIX-Therm (HECO-TOPIX-T) for working with low-strength insulating materials. The two threads enable fixation at defined intervals whereby the underhead thread fastens the counter batten. Negative forces, such as wind suction and compressive loads, are taken on in the counter batten exclusively via the thread and transmitted into the rafter. This prevents the counter batten from being pressed into the insulating material. Because it can be used as compressive, suction and shear screw in accordance with its ETA assessment, the HECO-TOPIX-Therm offers significant advantages over conventional fastening options, both in terms of application and material expenses.