The double sealing system is defined by two levels of sealing. Both internal and external permanently elastic weatherstripping provide perfect protection between sash and window frame.
A mid-seal system not only has an internal and external weather seal, but also has a third level of sealing which is placed in the center of the window frame and is therefore invisible. This enables better thermal insulation values.
In addition to window systems and systems for balconies, patios, sliding and lift-and-slide doors, Kömmerling also offers a wide range of PVC versions of residential entrance doors.
