A large temperature difference between the inner and outer frame of a door – e.g. through intense sunlight – leads to expansion of the outer frame. This can cause distortion of the door and locking difficulties; what we call the “bimetallic-effect”.
The skeletal design of the strip builds a flexible insulation zone and allows different expansion rates on the internal and external frames – this reduces distortion.
Technoform Bautec's anti-bi-metal profile minimizes distortion of door frames while retaining conventional construction methods.