Modern design meets natural aesthetics

For the first time, the revolutionary design approach of the premium uPVC-aluminium window KF 520 will be introduced as a timber-aluminium window in the form of the new HF 520: the particularly slim frame increases the proportion of glass and therefore maximises light transmission. This contrasts with traditional window systems, where the glass unit is enclosed within a sash frame.

The innovative glass sash of the HF 520 has no visible sash frame on the outside, which gives it the appearance of fixed glazing. It fulfils the highest standards of design and architecture. The HF 520 alu-clad timber composite window combines stunning aesthetics, natural finishes, and enhanced functionality: maximum sound insulation, optimum thermal insulation, and highest security. The HF 520 from Internorm sets a new standard for timber-aluminium windows, combining aesthetic, natural finishes, and functionality at the highest level.

Slim and flush for maximum natural light

The modern, flush transition between window sash and frame allows for the entire surface to appear harmonious and to blend elegantly into a home. The slim frame also offer maximum natural light transmission to brighten the interior.

Natural, energy-efficient and a perfect match

By incorporating natural timber, the Internorm HF 520 radiates natural warmth and comfort. At the same time, the robust external aluminium cladding protects against the effects of adverse weather conditions, providing longevity and easy maintenance. The unique Internorm innovation I-tec Glazing, ensures excellent thermal insulation. Individual colours and timber finishes, such as spruce, oak, larch, and walnut, offer numerous interior design options. 14 timber finishes can be selected for the interior, and any RAL colour is available for the external aluminium cladding.  There are virtually no limits to individual design options.

Stunning design meets outstanding performance

The new HF 520 alu-clad timber window not only looks incredible, it also performs to the highest standard to provide outstanding thermal performance, exceptional noise reduction, and enhanced security:

  • Thermal insulation as low as UW = 0.71W/(m2K)
  • Sound reduction up to 47 dB
  • Security up to RC 2
  • Concealed locking
  • Construction depth 90 mm

Improved sustainability

The HF 520 alu-clad timber window supports the energy efficiency of buildings and is characterised by a long lifespan. During development, the entire product life cycle, from the raw materials used, to resource-efficient production, and recyclability of raw materials at the end of its life cycle, was carefully considered. Internorm is committed to to sustainability and reducing our carbon footprint.

More individuality

The timber-aluminium window HF 520 is ideally suited to be combined with the uPVC-aluminium window KF 520. This provides a choice of material on the inside, with the same aluminium cladding on the outside, creating a uniform and harmonious appearance externally.

Endless combinations

The wide range of colours, finishes and handles offers many design options. The demands for comfortable living, individual design, and sustainability are constantly increasing. The new HF 520 more than meets these requirements and is the most stylish timber-aluminium composite window in the Internorm product range.

Find out more about our beautiful timber-aluminium and uPVC-aluminium windows and doors. Internorm also offers shading solutions and fly screens to keep those annoying bugs out of your home. Visit our Gallery and Case Study Page for inspiration.

Whether you decided on a retrofit, build your dream home, or focus on Passivhaus, your Internorm distribution partner will provide a one-stop-shop solution, from expert advice on the most suitable products for your project and budget, to survey and installation. Contact your local Internorm partner today.