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What does u-value mean?

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In your quest for the ultimate aluminium sliding glass door, we’re 99.9% sure that you’ve come across the term ‘u-value’- but do you really know what it means? Reducing our ecological footprints has become an integral part of European and British housebuilding, with U-values playing a crucial role. Allow us to delve a little deeper into the world of u-values.

What does u-value mean?

U-values measure the overall energy transference across a building to determine how effective specific materials are at insulating, e.g. glazing, walls, roofs, floors, etc. U-values are measured by the rate of heat flow in watts (W) through an area of 1 square meter (m), for a temperature difference across the structure of 1 C degree centigrade or Kelvin (K) – abbreviated to ‘ W/m2K ‘. Simply speaking, lower u-values indicate better insulating properties, as heat & energy transfer through the material at a much slower rate – which translates into lower energy bills for end users.

Thermally broken aluminium door u-values

Typically, aluminium glass doors offer u-values of 1.6 – 1.3 W/m2K. Fusing innovative design with high-performance thermally broken aluminium frames, ultra-slim sliding glass doors don’t get any more thermally efficient and acoustically sound than the viiu system – delivering incredible u-values as low as 0.75 W/m2K. Greatly exceeding the UK’s building regulation minimum requirements, these on-trend thermally broken aluminium doors make the ideal solution for low-energy households around the globe.

Key features and specifications

Living room viiu door installation

The value of low u-values

1. Enables architects, suppliers, installers & end-users to compare aluminium door systems and make an informed decision

2. Heightened weather protection

3. Increased protection against surface mould growth

4. Improved indoor thermal climate creates a healthier atmosphere for end users

5. Improving energy efficiency increases a properties EPC rating, which has the potential to add up to 14% onto its resale value.

Create exciting interior prospects with contoured & contemporary thermally broken aluminium doors from viiu

Offering unlimited views and provocative possibilities, contact us today to discover the many advantages of working with the viiu team.

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Some of the photographs featured on the site have been provided by the following: Christophe Van Couteren, Samuel Defourny, Crahay, Jamaigne Architectes & Atelier d'architecture Franck Martinez