ALU - Wood

  • The LINEAL W-THERM 104 system enables the installation of standard fittings into the EURO 1 groove.
  • Filling options from 41 to 61 mm.
  • Triple sealing in the area where the frame and the sashes connect.
  • The massive wooden coating on the indoor side is made of hard wood (oak, beech, mahogany …) and protected by various types of acrylic coatings of exceptional durability.
  • The wood profiles are fixed on an aluminium load bearing structure using polyamide connectors which allow for dilatation between various materials. The wood coating improves the thermal and acoustic properties of the elements.
  • The design of the wood coating is original and aesthetically unique.

See what options we offer

Glass panes

Aside from the ALU profile, the insulation properties of ALU windows also depend on the glazing method. Lately, with increased awareness and necessity to save energy, there is a higher representation of triple-layer 44 mm thick glass panes, with the 4-16-4-16-4 composition, low-e coating, and gas fills. At Iveta, we produce the glass panes ourselves and we are able to fully control the quality of the final product and reduce the production and delivery time.

Appearance of your home

The modern construction industry is lately increasingly leaning toward aluminium, which is one of the leading materials thanks to the fact that it is light and strong, easy to work, and resistant to various weather conditions. Those are the reasons why aluminium joinery is popular in modern construction, and architects are fond of it. Aside from standard aluminium joinery, the aluminium-wood combination is also increasing in popularity. The best qualities of these two materials are combined – strength of aluminium and the excellent insulation properties of wood.


The LINEAL W-THERM 104 system is one of the six systems from the LINEAL line of aluminium profiles with a thermal break and a massive wood coating on the interior side, specifically designed for making window elements and patio doors with the frame installation depth of 104 mm. The system is designed to meet the modern requirements from the area of energy efficiency, as well as other requirements for a safe and comfortable living and work space. During the design stage of the system elements, the materials used for the thermal break inside the profiles were carefully selected. Maximum thermal insulation characteristics were achieved in this manner Uf≈1,20W/m²K, or Uw≈0,79W/m²K.

The RAL colour palette

It represents the colours from the RAL 840HR Colour Register, developed in the German Institute of Quality Assurance (RAL), where colours have numerical designations. The Colour Register is divided into eight groups of colours with numerical designations that partially overlap. The following characteristic numbers have been selected for the RAL groups of colours: RAL 1000 yellow colours RAL 2000 orange colours RAL 3000 red colours RAL 4000 purple colours RAL 5000 blue colours RAL 6000 green colours RAL 7000 grey colours RAL 8000 brown colours RAL 9000 white and black aluminium shades


The aluminium profiles we use have a certificate from Ift Rosenheim. Ift Rosenheim GmbH Germany is an authorised European body for testing, supervision, and certification, with an international accreditation according to DIN EN ISO/IEC 17025, authorised to set the rules for defining and assuring quality.

Joinery maintenance

ALU doors and windows should occasionally be wiped using a damp cloth and warm water. We do not recommend using coarse sponges and wire sponges, or cleaning agents of any kind. Regularly remove dust and other residue from the profiles, fittings, gaskets, and from the edges of the profiles.