W4750 THERMO Tilt & Turn Highly Thermal Insulating System

The most demanding thermal insulation requirements

The ALUMINCO W4750 is an advanced aluminium system that combines the proven benefits of hinged windows and doors – elegant design and maximum safety – with the highest thermal insulation requirements.

Three incomparable advantages, the use of 39 mm reinforced polyamides, the EPDM central gasket and the advanced perimeter locking mechanism, all in one system offer an outstanding Thermal Insulation Index Uf ≥1.2 W/m²K.

It constitutes an ideal solution for high-end residential and commercial projects that require high energy efficient performance with a high degree of design along with top functionality.

Features and Benefits

  • Use of glass reinforced polyamides and a foam insulating material, that offer top insulation rate Uw=1.00 W/m²K.
  • Visible aluminium face width 102 mm.
  • High water tightness performance due to the use of 3-level gaskets and multi chamber EPDM gasket of double extrusion
  • The advanced ALU16 locking mechanism offers better safety and high protection.
  • Large range of aesthetic solutions, of profiles in straight and curved cross-section with the ability to manufacture all types of openings frames.
  • Ideal solution for houses and buildings of high energy requirements.



EN 12207 Air Permeability CLASS 4
EN 12208 Water Tightness E1200
EN 12210 Resistance to Wind Load CLASS C5/B5
ISO 10140-2 Sound Reduction (Rw) 39 dB
EN 10077-2 Thermal Insulation (Uf) 1.2-2.3 W/m²K


> Casement windows: 1Leaf – 2Leaf – 3Leaf – 4Leaf
> Casement-awning windows: 1Leaf – 2Leaf
> Shutters: 1Leaf – 2Leaf – 3Leaf – 4Leaf
> Doors: 1Leaf – 2Leaf – Tilt & Slide (VW)
> Angular structure: 90°-224°
> Fixed-picture windows
> Combinations: 2Leaf sliding SL2450 – 2Leaf sliding with insect screen SL200

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