Building physics

The U-value is no magic!

Two ways lead to your element's U-value: calculate or measure.

Two ways to the U-value

1. Calculate

Determine the U-value from your element's layer build-up.

To the U-value calculator →

2. Measure

Measure the U-value yourself or with a device directly on the element.

To the measurement guide →

What is the U-value?

The U-value (thermal transmittance) indicates how much heat is lost to the outside through a building element – such as an exterior wall, a roof or a window. It is expressed in watts per square metre and kelvin (W/(m²·K)).

The lower the U-value, the better the insulating effect and the less heating energy escapes through the element.

Why the U-value matters

In energy-efficient renovation and new construction, the U-value is a key figure: it affects heating demand, comfort and compliance with legal requirements (e.g. building energy legislation). Grants often also require certain U-values per building element.

PSCoat and the U-value

PSCoat works primarily through thermo-reflection – the coating reflects heat radiation instead of slowing it down via material thickness like classic insulation. How this affects the thermal behaviour and characteristic values of a given element depends on the substrate and layer build-up and is determined per project. Test evidence and technical values are provided via NANO.DOCS.

Technical values (NANO.DOCS)

Note: An interactive U-value calculator is in preparation. For a project-specific assessment, please get in touch with us. Contact.