With the NF1 barrier-free balcony door, you benefit from flat transitions between living space and terrace. Tripping hazards and annoying obstacles are a thing of the past. Developed, constructed and tested by 4B engineers, it is a novelty in Switzerland.
The balcony door with zero threshold, for which a patent has been applied, is manufactured using the latest technology and offers the best thermal insulation and security as standard. It enables you to live in an age-appropriate and barrier-free manner in every phase of your life.
