The building envelope determines the future potential of your building

What does the building envelope mean to you in sustainable construction?

The building envelope is more than just a boundary between inside and outside. It determines the performance, comfort and lifespan of a building. A robust, well-designed envelope offers scope for energy optimisation, circular use of materials and climate adaptation.

Are there any projects that illustrate this?

Absolutely. Gare Maritime focused on preservation and integrated PV panels. Royal Belge combined heritage value with high-performance glass choices. At Buildwise, we worked with a green façade and a layered, detachable structure. Each project shows how versatile our vision is.

What often goes wrong with building envelopes?

A holistic approach is often lacking. Think of designs that do not take orientation into account, the separation of the envelope from the building, or ignoring the potential of the roof. Maintenance is also often forgotten. Everything starts with an integrated vision.

How does the building envelope contribute to climate goals?

For me, extending the lifespan is the biggest win. What you don't have to build or replace yields the greatest gains in terms of sustainability and reducing environmental impact. In addition, facades and roofs can be used for renewable energy and nature-inclusive applications.

What does circular construction mean in this context?

For me, circular construction is more than just dismantlability. It is also about robustness, ease of maintenance, multifunctionality and reuse. I look at it on three levels:

• At the building level: does the façade allow for reconfiguration?
• At the element level: is a façade panel dismantlable, prefabricated, modular?
  
• At the material level: are finishes easy to replace or reusable?

How do you view bio-based applications?

I am positive, but critical. Not every bio-based material is suitable for every application. Wood certainly has potential, but it requires proper detailing and good maintenance. Green façades can be useful, but only when they meet a real need.

And façade as a service?

An interesting idea, especially because it involves the supplier in the long term. But it also requires a different approach to design, tendering and construction. Whether it will really catch on remains to be seen.

When does it make sense to involve a façade expert?

Always. The façade is the most complex part of a building. An expert ensures an integrated approach, thinks long term and prevents common mistakes.

Demolish or preserve?

That depends on the building, its condition, the materials used and its future function. Preservation is ecologically interesting, unless it requires more material to meet current standards. The impact on the environment, cost and timing also play a role.