For Roto Eifel thresholds is used only UV-resistant, highly impact-resistant PVC. According to DIN 18040 (DIN 18025), they are barrier-free due to their threshold height of 20 mm.
A considerable isothermal efficiency improvement in the vicinity of the threshold connection area can be observed due to the threshold profile’s thermal break.
The relocation of the isothermal curve clearly reduces the risk of condensation formation and moisture damage on the inside. The heat insulation is significantly improved by incorporating the threshold into the door system.