Bertrand Windows and Doors


A modern wood-aluminum system with a hidden door leaf.

Modern or traditional? Light or solid? Durable or noble?
Windows Synergic brands Bertrand it is an uncompromising solution. A hand-polished wooden window profile will bring a cozy, warm atmosphere to your home. Durable, rain- and UV-resistant aluminum will ensure durability and safety of your windows.
When opposites attract, an ideal solution is created: a narrow, elegant wood-aluminum profile with a hidden leaf, tailored to your requirements.

Installation depth

81.5mm, 91.5mm


0.5 W/m²K


up to 48 dB

Number of seals


Type of wood

pine, oak, meranti, larch, spruce

Warm frame


Internal colors

transparent, RAL or NCS colors

External colors

any RAL – structure or mat





Decorative glass

ornamental available as an option



  1. A modern profile shape in line with current trends in architecture
  2. Hidden sash (the window frame is not visible from the outside)
  3. Possibility of using glass packages up to 58 mm (XL)
  4. Rich colors of wood and aluminum
  5. High resistance to weather conditions
  6. Triple glazing
  7. Three seal lines
  8. System depth: 81.5 mm/82.5 mm, XL 91.5 mm/92.5 mm
Advanced technology of gluing glass packages, combined with modern fittings, allowed to achieve RC2 class burglary resistance.
Natural light
Ultra-narrow frames and large glass surface provide plenty of natural light inside the house. The height of the frame with the sash is only 90 mm.
Energy saving
Fantastic thermal insulation coefficient - up to 0.78 W/m2K.
Acoustics definitely better than traditional solutions. The Rw (acoustic insulation) coefficient reaches up to 48 dB, which is the standard level of 150%.
Modern style and minimalist design, based on expressive shapes. The aesthetics of wood combined with the fashionable style of aluminum create timeless beauty and the highest durability.
The window frames are made of 90 mm thick wood. Protection against weather conditions is provided by an aluminum cover. During quality tests, the system achieved the highest classes of waterproofness, air permeability and wind load.
Modern fittings ensure easy opening and closing of windows.
The view from inside
View from the outside

Product SYNERGIC comes in the following versions

ask about the product

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