Plastic window frames for Lot 6

Fine details and low maintenance

The Amsterdam project Kavel 6, where apartments and senior housing will be built, consists of four buildings designed by different architects. Three of the four buildings will receive plastic window frames from Kumij.

Kumij produces plastic window frames for the b2b market. These are assembled throughout the Netherlands. Lot 6 in Amsterdam involves 577 of them, which are being installed on behalf of Heijmans. The architects have designed the buildings and therefore also the window frames, after which it is up to Kumij to produce them as desired. Kumij draws everything out in terms of product technology and details. Rob Jacobs, account manager, explains how the process works: "Once the drawings are final, we order the profiles. These are delivered in lengths of 6.5 meters. Everything is processed by ourselves and transported to the construction site."

German installation method

Block A will have K-Vision Trend window frames with a 45-degree corner joint. These will be finished in anthracite gray. Block D will have the same window frames in a dark brown color. These cannot be distinguished from real wood. For Block C, K-Vision Cube window frames were chosen, which are built in according to a German installation method. These are mounted behind the outer leaf, making the frames invisibly attached. There are also a number of fire-resistant window frames in the project, and Kumij is providing the aluminum flashing that will be placed in front of the ventilation grills. This is necessary to make the facade more soundproof.

Unburdening the contractor

On this project, the frame manufacturer also installs the soundproof glass, Jacobs continues. "This is installed from the inside. We completely relieve the contractor of any worries about façade closure. Fences and fall-through protection we also install. On assembly, glass and frames, we give a standard ten-year warranty."

That plastic window frames were chosen is no surprise to Jacobs. "The buildings are tall and then wood is used less and less often these days. Plastic does not require painting and maintenance can be done from the inside. Moreover, it is more economical than aluminum."

Long delivery times

This is not the first time that Kumij has worked for Heijmans. It had previously worked together on Lot 2, so the cooperation is running smoothly, partly because Kumij was involved in the project at an early stage. "This is necessary, because delivery times in the construction industry are currently long. This is well anticipated here," Jacobs said.