Bertrand Windows and Doors



The modern and technologically advanced KUBUS system presents a new look at window joinery. It fits perfectly into current architectural trends focusing on minimalist design, simple shapes and large glazing.

Folding height


Number of seal levels


  1. A modern profile shape in line with current trends in architecture
  2. Installation depth 100 mm
  3. Acrylcolor color palette
  4. Increased statics thanks to STV*
  5. 3 seal lines
  6. More light
  7. Increased thermal insulation parameters
  8. Narrow profiles
The outer side is finished in the proven acrylcolor technology.
High stability and innovative sash design thanks to the innovative STV® technology (dry glass gluing).
Maximum thermal insulation thanks to IKD® (filling the frame chambers with insulating material).

Optimal shape in every aspect

KUBUS also convinces with its functional values. The smooth contours of the frame and the complete lack of seals in the frame enable convenient care, and the perfectly designed offset in the frame creates a warm central seal.

Different functions – one dimension

Consistently the same width! 100 mm also for folding behind the movable post.

Assembly variants

Thanks to various installation variants, the KUBUS system gives architects a unique opportunity to freely design different widths of the visible frame in window units located even on the same façade.

door frame visible in 100%
door frame partially visible
the door frame is almost invisible

Product KUBUS comes in the following versions

ask about the product

If you have any questions about the KUBUS product or are interested in cooperation, do not hesitate - fill out our contact form.