FAQ

The U-value is one of the most important parameters of the window, since it shows the heat loss per square metre per hour for every degree of difference in temperature between the inside and the outside. The lower the heat transfer coefficient, the more effective the window’s thermal insulation is and the less heat that is transmitted to the outside. All U-values are obtained by window testing. The tests are performed with standard-size windows (1230 mm x 1480 mm). The coefficients for windows of other sizes are calculated by a programme.

  • Fixed
  • Casement
  • Tilt and turn
  • Tilt-only
  • Accordion
  • Folding
  • Retractable sliding
  • Sliding

Available in RAL and NCS colours. We recommend using paint for the outside part of a wooden window, but the inside part can be:

  • Finished with the same colour as the outside of the window (most economical).
  • Finished with another RAL or NCS colour.
  • Finished with a clear varnish that shows off the wood’s natural colour.
  • Finished with a varnish that gives the window the desired shade.

Double-, triple-, or quadruple-glazed units can be installed in the windows. Their thickness can range from 24 mm to 60 mm. “Warm” (non-aluminium) frames from companies like Thermix, TGI, Swisspacer and Chromatec Ultra are used to improve the thermal properties of the perimeter of the insulating glass units. The most commonly used insulating glass unit options are:

  • Solar control glass units
  • Self-cleaning insulating glass units
  • Tinted insulating glass units
  • Acoustic insulating glass units (sound insulation up to 52 dB)
  • Fire-resistant insulating glass units (Ei30–Ei60)
  • Safety insulating glass units (with tempered or laminated glass)
  • Insulating glass units with decorative glass

Aluminium cladding is mounted on the outside of the window, 2–4 mm away from the wood. The air moves freely in the space between the cladding and the wood, thus allowing the wood to breathe. When installed properly, the aluminium provides the wood with maximum protection from adverse atmospheric factors.

The aluminium profiles can be powder-coated in any colour from the RAL palette, or they can anodised to give them a silver tint. We can also offer aluminium cladding in exclusive colours, including wood-patterned finishes.

The aluminium cladding corners can be joined by welding. Corners connected in this way do not have any seams and look aesthetically pleasing.

Aluminium clad windows are high-end products that do not require special maintenance.

Depending on whether the window is hinged or not, we can produce the following sizes:

Hinged window:

  • Min: 410 mm x 410 mm.
  • Max: 1100 mm x 2400 mm.

Fixed window:

  • Min: 330 mm x 330 mm.
  • Max: 3600 mm x 2600 mm.

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