A good U-value contributes to energy savings, as well as quality of life.
U-value, formerly known as K-value, is used in the construction industry to indicate to what extent a material is thermally insulated. The lower the U-value – or, “thermal transmittance” – the higher the heat resistance of a material – thus, the better the insulation. Because the thermal transmittance is determined by the profiles of windows and doors, plus the glass, the U-value of both components should be considered for the joinery of an aluminium construction.
Saving energy with aluminium and glazing
The building industry distinguishes five categories:
- Ug-value: the U-value of the glazing. G stands for glass.
- Uf-value: the U-value of the chosen profile. F stands for frame.
- Uw-value: the U-value of your entire window. W stands for window.
- Up-value: the U-value of the aluminium panel in your door. P stands for panel.
- Ud-value: the U-value of your entire door. D stands for door.
And then there is the Psi-value, which affects the total U-value and expresses the heat loss at the transition from the glass to the window frame, measured over a given length. Choosing the best insulation solution means not only taking into account the insulation value of the profiles but also of the glazing of your moveable or fixed vent. The full package is what helps you save energy.
Sustainable living and working
In thermal insulation, some of our Reynaers Aluminium systems have reached a limit for U-values at Passive House level, well under 1.0 W/m²k. Ventilation, solar control and airtight building connections are essential as well. The mix of all these elements makes it possible to achieve a comfortable climate, even directly behind a large glass façade, regardless of the weather. That is what we call “quality of life”.
Reynaers Campus: Experience Centre – Jaspers-Eyers Architects (architect); Phillippe Van Gelooven, Georges De Kinder (photographers)