What Are the Benefits of Alu-Clad Windows?

Whether you're renovating an existing property or building your dream home, choosing the right windows is one of the most important investments you'll make. They influence not only the appearance of your home, but also its energy efficiency, comfort, security and long-term running costs.

With energy prices remaining high and homeowners increasingly looking beyond minimum Building Regulations, more people are investing in high-performance windows that deliver lasting value rather than simply the lowest purchase price.

One of the most popular choices for modern homes is the also known as a composite window. By combining the strengths of two materials, these windows offer outstanding thermal performance, exceptional durability and almost unlimited design flexibility. Internorm's timber-aluminium and uPVC-aluminium composite windows are triple glazed as standard and are designed to provide decades of reliable performance with minimal maintenance.

An aluminium-clad window combines a highly insulated internal frame made from either engineered timber or multi-chamber uPVC with a durable powder-coated aluminium exterior.

This gives homeowners the best of both worlds:

• The natural warmth or excellent insulation of timber or uPVC inside

• A strong, weather-resistant aluminium exterior that requires virtually no maintenance

• Exceptional energy efficiency

• Extensive colour and finish options

Unlike standard aluminium windows, composite windows benefit from significantly improved thermal performance while retaining the sleek appearance many homeowners desire. Internorm's and windows incorporate important frame insulation, which makes a huge difference to the performance and longevity of the window.

For coastal properties, the external aluminium cladding can also be pre-anodised before powder coating, providing additional protection against corrosion in harsh marine environments.

Energy efficiency is one of the biggest reasons homeowners choose composite windows.

Internorm timber-aluminium and uPVC-aluminium windows achieve whole window (Uw) values as low as 0.62 W/(m²K), exceeding the requirements for many low-energy homes. Triple glazing, insulated frames, triple gaskets and Internorm's innovative I-tec Glazing technology work together to minimise heat loss and improve comfort throughout the year.

Many Internorm window systems are also Passivhaus Certified, while others are ideally suited to projects being built or renovated to Passivhaus standards.

Traditional timber windows require regular painting or staining to protect them from the weather. Aluminium-clad windows eliminate almost all of this maintenance. The external aluminium protects the window from rain, UV exposure and temperature fluctuations, helping it maintain its appearance for decades.

Although premium composite windows represent a higher initial investment, their durability, reduced maintenance and lower energy bills make them excellent long-term value.

Your windows should protect your home as well as enhance it.

Internorm windows achieve RC2 security as standard, with RC3 available on selected systems. Features such as I-tec Glazing, high-quality multi-point locking systems and the innovative I-tec Secure locking technology provide outstanding resistance against forced entry, while PAS 24 and Secured by Design accreditation offer additional peace of mind.

Modern windows should do far more than simply let in natural light. They should also help protect your home and your family. Internorm aluminium-clad windows incorporate multiple security innovations and are manufactured to exceptionally high standards.

Features include:

• Triple glazing bonded directly to the sash using I-tec Glazing

• High-quality multi-point locking systems

• RC2 security as standard across all window systems

• RC3 security available on selected products

• PAS 24 accreditation

• Secured by Design approved products

Selected , including the KF 510 and KF 520, also feature , an innovative locking system with integrated flaps that make forced entry significantly more difficult.

Noise pollution has become an increasing concern, whether you live in a city, near a busy road or simply value a peaceful home.

Internorm windows can achieve sound insulation of up to 48 dB, helping create quieter living spaces and improving everyday comfort. Read more in this

One of the biggest advantages of alu-clad windows is their design flexibility. Internorm offers four distinct design styles, from contemporary minimalist designs to more traditional aesthetics. Internal timber finishes are available in a choice of sustainably sourced spruce, oak, larch and walnut, while the internal uPVC can be customised with a choice of foil and print finishes to suit your taste and interior. The external aluminium cladding can be specified in hundreds of RAL colours and finishes to complement any architectural style.

Whether you're renovating a country cottage, period property, or building a contemporary home, there's a solution to suit your project.

Sustainability is built into every Internorm window. From responsibly sourced timber and recycled uPVC to energy-efficient manufacturing processes, every window is designed to reduce environmental impact while delivering decades of reliable performance.

Choosing high-quality windows that last longer and consume less energy is one of the simplest ways to improve the sustainability of your home.

Aluminium-clad windows combine outstanding energy efficiency, low maintenance, advanced security and timeless design in one high-performance solution. Whether you choose or , Internorm windows are engineered to deliver exceptional comfort, lower energy bills and lasting value for your home.

If you're planning a renovation or self-build, to explore the most suitable window solution for your project.