Galvanized steel as supporting construction

Jansen AG

These lightweight constructions and facade profiles are detachable and reusable because all connections are reversible. This makes reusability very easy. Producing these detachable constructions also leads to significantly reduced CO2 emissions in comparison to conventional construction methods. The system is offered as a complete service to developers, building managers and users of buildings. This means that after use, the steel is taken back by the manufacturer, who can use it again.

Demountable structures are an important building block of the circular economy

Just look at this symphony of steel and timber in the train station of Assen. The steel Jansen Viss curtain wall connects seamlessly with the wooden roof construction. One material is biobased and the other is a durable material with a very long lifespan. The key to circularity is the connection with the circular building method of “detachability” so that reuse is a possibility in the future. The materials and methods combined offer, when well designed, a very sustainable solution to the challenges we are facing in the built environment. You might call it “Stimber Building Solutions” (“Stout Bouw”/NL – “Stolz Bau”/DE –  “Boicier”/Fr).

Galvanized strip steel is a metal mixture of

  • Iron
  • Carbon
  • Zinc


Steel as a basic material is certainly not new, its viability and applicability is known. Steel as a basic material is certainly not new, its characteristics and applicability is known. However, this method is not so much about the material, but about the principle of offering circular prefab constructions that allow detachable building methods and the reuse of the steel material. And that is a smart new way to extend the life and the usage cycles of the material. This is now being applied on a small scale. The load-bearing construction can be used in various architectural structures. Slender and high facades are the trademarks of Jansen AG but constructions like these are also used in tiny houses for example.

Environmental impact

  • The connections in the construction are detachable. As a result, the construction cannot only be disassembled for reuse, but the existing construction can also be expanded for a longer lifespan, making it more sustainable.
  • The technical lifespan of the construction is set at 100 years. However, for Jansen AG it is of greater importance that the construction can be used in infinitely short cycles.

Growth opportunities

As Jansen AG, a company that is the market leader of steel windows, doors and facades, we can only deal with one part of the problem ourselves. 

The beginning of the steel chain (raw materials) must take its own responsibility. For example, by making the mining of raw materials more sustainable and by working with renewable energy in the production of steel. However, what we do know from the LCA calculations is that when iron has become steel it has a high reuse potential due to long lifespan of the material. 

Together with our clients Jansen AG takes care of the construction and reusability of steel.  A façade, a door or a window is only part a house or a complete building. We depend on chain partners in the circular building industry for the total solution and that is why Jansen AG focuses on collaboration for the growth or our circular ambitions, united in the platform Harvest Bay.

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