Window frames with high-quality insulated glass

Frame and curtain wall elements under one roof

For the Ashram College in Alphen aan den Rijn, 250 window frames have to be produced, accounting for a total surface area of 1,200 m2. But also two curtain walls, with a total surface area of 170 m2. Because the aim is to create a very energy-efficient building, the window frames must be fitted with high-quality insulating glass with a U-value of no more than 1.0.

The window frames and curtain walls were ordered from Lieftink Geveltechniek and that is no coincidence. Lieftink Geveltechniek is also based in Alphen aan den Rijn and in the past seven years has been involved in the construction of four secondary schools in this town. "The Ashram College is the fourth school," says Joost Plompen, director of Lieftink Geveltechniek. "It always gives an extra dimension to work in your own place. In the process, we supply both the frame elements and the curtain wall elements. A big advantage for the ADS Group; it can now arrange all the elements at one address."

Accessibility and manageability

To meet the high insulation value, Lieftink Geveltechniek chooses a heavier frame system combined with triple glazing. Currently, the elements are still in the engineering phase. Circumstances will later determine whether it delivers the frames and glass separately or as a single unit, glazed and all. "This has to do with accessibility and manageability," Plompen explains. "If we deliver the window frames by truck, they have to remain portable. Then it helps if we deliver frame and glass separately. If we have to rely on using a crane anyway, it is more economical to deliver the window frames glazed."

The considerations illustrate that Lieftink Geveltechniek is involved in all steps on the way to the final result. "Designing, machining and assembling profiles, powder coating, assembling, thinking along with us about appropriate hardware: we always actively think along."