Modern wood-aluminium system with a hidden sash.


Modern or traditional? Light or sturdy? Durable or noble?


Bertrand SYNERGIC windows are an uncompromising solution. Hand crafted timber frames bring a cozy atmosphere into your home. Aluminum cladding with high resistance to the elements, including rain and UV, ensures durability and security.


When opposites attract, we come into the ideal situation: narrow, elegant wood-aluminum profiles with hidden sashes, tailored to your very own requirements.


SYNERGIC window features:


  • U Factor from: 0.16 Btu/hft2F
  • system depth: 3 13/64 in, XL 3 39/64 in
  • SHGC: 0.15 – 0.25
  • Vt: 0.29 – 0.43
  • Max glazing unit: 2 9/32 in.
  • Soundproofing: to 48 dB
  • modern profile shape in line with the current trends in architecture
  • hidden sash
  • possibility of using the glass pane sets of up to 2 9/32 in (XL)
  • numerous colours of wood and aluminium
  • high resistance to weather conditions
  • two or three glass panes glazing
  • three sealing layers




Synergic Alu XLAwning window0,11 – 0,310,18 – 0,190,20 – 0,45
Synergic Alu XLSide hinge door0,10 – 0,310,180,26 – 0,45



Learn more about Synergic

Thanks to the use of wood and aluminium, the SYNERGIC windows are extremely durable and resistant to weather conditions.
Following the current architectural trends, the SYNERGIC windows design will be the true embellishment of your home.
The rich colour palette will allow you to adjust your windows to your individual style.


Advanced technology of gluing glazing units, combined with modern fittings, allowed to achieve burglary resistance up to RC2 class.


Natural light

Ultra narrow frames and a large glass surface provide plenty of natural light inside the house. The height of the frame with the sash is only 90 mm.


Energy efficiency

Sensational thermal insulation coefficient – up to U Factor (summer) IP from: 0.1375 Btu/hft2F /  Factor (metric) IP from: 0,78 W/m2K



Definitely better acoustics than traditional solutions. The Rw (sound insulation) coefficient reaches a value of up to 48 dB, which is 150% of the standard level.



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. Aluminum cover provides protection against weather conditions. During qualitative research, the system achieved the highest classes of water resistance, air permeability and wind loads.



Modern fittings ensure easy opening and closing of windows.


SYNERGIC is a wooden window system with an aluminum cover. It is distinguished by very good thermal insulation parameters, which the Customer can receive at a price similar to a wooden system.

Glazing3-glass glazing unit, 2-chamber
RW (soundproof)up to 48 dB
Warranty5 years
Wood typepine, oak, meranti, larch, spruce
Warm frameChromatech, Multitech
Inside colorstransparent, RAL or NCS colors
Exterior colorsany RAL – structure or mat
Bondingthree layers
Sealsthree sealing layers
Ornamental decorative glassavailable as an option


More about Synergic in article on our BLOG