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Van der Burghweg 1
2628 CS Delft

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Please reach out to us if you have questions or if you wish to participate

Due to all of the booming attention we received in the last months we are unable to respond to everyone personally. We are very sorry and do all we can to answer your questions in the FAQs and on our website and socials.

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Frequently asked questions

To provide you with direct answers to questions you may have, please consult our FAQ.  

Does bioreceptive concrete resist damage from frost?

The recipe is designed in such a way that water is given room to expand, which happens during frost. In addition, the vertical application prevents much of the long-term build-up of moisture. As a result, it is expected that the concrete will not crack. Respyre is conducting tests in the climate chamber to validate this.

Is this concrete actually sustainable?

We upcycle concrete rubble and use reactivated cement to make the concrete. This keeps the environmental impact of the product as small as possible. The growth of the moss also compensates for the emissions, within two years of moss growth, the emissions from the production of the product are compensated.

Is this "moss concrete" already available?

Respyre is still in development phase. The technique is now at TRL 7 and we are working on large-scale pilots to validate the operation of the technique. The technology is available for demonstrators/pilots and for long-term tender applications. Sign up for the newsletter to stay informed or mail for a pilot!

Does the moss die?

Moss is very capable of sustaining itself. During long, dry spells in the summer, it goes into a kind of hibernation mode, turning the leaves inward so that no moisture is lost. After a splash of water, the moss will soon be as before. If necessary, we have a simple technique to fill gaps.

Can bioreceptive concrete be used at any location/height/orientation?

There are about forty types of moss in the Netherlands that nest on stone surfaces. Each species feels better under specific conditions such as light intensity and moisture regime. By bringing many types of moss, the species that feel at home in that place will germinate. Indoor solutions require extra light and irrigation.

What is the total thickness of the system?

We now mainly use a plaster layer of 1.5 centimeters thick. In addition, the moss layer is about 2.5 centimeters thick, so in total you can count on about 4 centimeters.

What does this vertical landscape cost?

Our aim is to be significantly cheaper than current green facade systems. We do this by striving for a low purchase price and a minimal maintenance contract. Due to the many conceivable applications of the moss concrete, it is difficult to give a general price indication. Please email us and we’ll take a look at your project.

Architectural or other questions? Send us an e-mail!

Many specific architectural questions are better answered by providing tailor-made advice. Are you looking for this? Do not hesitate to send an email to Also keep an eye on our page on LinkedIn.