Wanted: a biobased, modular and circular construction system for pilot entrance building Floriade

Challenge info

Dagen Uur Minuten

Deadline: 28 July 2020
Status: Deadline verlopen
Prijzen(geld): Innovation budget max. €50.000

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Innovation budget max. €50.000

deadline verlopen

The Ministry of Agriculture, Nature and Food Quality stimulates the development of biobased and circular products. We want to use this to reduce the use of (finite) raw materials and energy consumption.

Organic residual flow from the horticultural sector is still a largely untapped opportunity. We challenge you to develop a modular and circular construction system, in which organic residual flows from horticulture are used.

This combination of residual flow and application potentially has a major impact:

  1. When composting organic streams, about 50% of the fibers are lost, and greenhouse gases CO2, NOx and methane are released
  2. A lot of energy is required to produce conventional building materials such as steel and concrete
  3. In order for biobased building materials to substantially contribute to CO2 reduction in construction, it is important to find cost-effective applications for bio-raw materials, while the building culture in the Netherlands still relies heavily on brick, concrete and steel.

The national government and Floriade collaborate in public communication regarding sustainable development: Growing green cities. As part of this challenge, the Floriade wants to realize their entrance building in 2022 as a test case with new biobased circular building materials!

That is of course a first start. This challenge preferably inspires a circular, biobased construction concept that can be used on a large scale for sustainable buildings.

Do you have the solution for this? Then we would like to receive your pitch!

What are we looking for?
The Floriade will open in 2022 and the entrance buildings should be made of materials that have a clear link to horticulture. The Floriade is the only World Exhibition in the Netherlands and pre Corona it was expected to attract 2 million visitors.

The entrance buildings must have a sustainable appearance and preferably a wow factor due to the special use of materials or design. As part of this challenge, the Floriade wants to have their entrance building realized in 2022 as a test case with new biobased circular building materials.

Preferably, the entire construction consists of biobased materials (with the exception of glass and the installation). Afterwards, the building should be easily dismantled and will probably be used at the Greennest Experience in Hoofddorp or Amsterdam.

We are looking for a modular and demountable construction system with a description of the various parts thereof. You are free to determine the nature of the construction system, as long as it can be dismantled and reused elsewhere after the Floriade. A clear vision of disassembly scores in the assessment.

The construction system must be realized with residual flows from horticulture as a basic raw material. Consider, for example: eggplant and tomato stems, tomato leaf, pepper knots, champost, chrysanthemum stems, freesia leaf, etc.

The material made from the residual flows may, for example, consist of pressed plates, cultivated parts of mycelium, insulation material in the form of flakes / granules, or combinations thereof.

The submitter (or collaboration of submitters) must be able to demonstrate that he / she can realize the building (or have it realized), i.e. that the proposed techniques are close to market maturity.

The entrance building consists of 8 cash registers and approx. 40 m2 back office (approx. 50 m2 in total, it must be wind and waterproof and the insulation value must be at least in accordance with the building decree (walls Rc 4.5, roof Rc 6).

The proposed construction concept must clearly indicate which construction structure and material choices have been made per construction element (such as facade parts, cavity leaf, frames, floor) and provide a substantiated indication of the costs.

There is NO design of the building itself included in the submission, the design will be done in the first phase after winning the challenge in consultation with the Floriade.
The proposals submitted will be assessed on the following aspects:

1 Contribution to a biobased use of horticultural waste: 
The higher the percentage (volumetric) of building materials that is biobased en sourced from horticulture, the better.

2 What architectural possibilities does the proposed solution offer? 
The appreciation for a material rests not only on its technical properties, but also on its appearance and architectural possibilities for large-scale application. What special properties does the proposed building system have? For example, is it easy to build special shapes? Is it cost-effective to realize? Is it fireproof?

3 Cost
Give an indication for a blind facade 6 meters long and 2,6m high. Specified for material and Voor blinde gevel van 6 meter lang en 2,6m hoog, gespecificeerd naar materiaal en placement.
4 Demountable

How easy is it to demount and build up again in another place.


What are we not looking for?
Biobased solutions using straw or only wood (i.e. without horticultural waste) do not meet the requirements, but can serve as a source of inspiration.

What is there to win

This challenge is divided into two phases:

Phase 1 The winner gets the opportunity to make a design in collaboration with the Floriade and the Ministry of LNV on the level of detailed working diagrams and cost buildup. For this phase €5.000,- is available.

Phase 2 The winner can realise the 'Entreegebouw' on the Floriade as a pilot, if the design and realization is up to the standards and whishes of the Floriade. For this phase up to €50.000,- is available.


  • A 3-5 month guidance program in which you can take both the solution and the company to a higher level. You can find more information about the program and the various components on our programme page.
  • Access to the government network.

Questions about this specific challenge you can ask on the discussion page till the 8th juli 2020. Questions about the programme and registration procedure you can find on the FAQ-page.


You can register by submitting a Proposal (here). This may not be longer than 6 A4 + 3 A4 attachment (in the same document).
The further requirements of this proposal and how it is assessed are set out in the formal Request for Quotation (pdf download). Read it carefully!
Send in with your proposal a completed UEA (Uniform European Tender Document (docx download)). Save this as a PDF.
By participating you also agree to the General Terms and Conditions for purchasing services and assignments: ARVODI-2018 (pdf download).

The proposal may be submitted in any form (presentation / slide deck, letter form), but must be uploaded as a PDF file (landscape or portrait A4) (max. 30MB).
Pitches in English are allowed.


The full timeline is given in the request for quotation. The most important moments are:17 June - Challenge live
  • 1 July 9.00 - Informatie meetup - read all the questions and answers (Dutch)
  • 8 July - Deadline asking questions
  • 28 July, 17:00 - Deadline for proposal
  • 10 August - First selection
  • 31 August - 4 september - Live pitch round
  • 5 October - Final selection decision
  • 2 November - Start of Startup in Residence programme



The Sky garden is an example of a pavilion (which was innovative in 2018) with a clear link to horticulture.

Examples of modular construction concepts include: Blokiwood, Ursem (hotel rooms hotel Jakarta), Wikkelhouse, and Sustainer Homes. These concepts are not always simple to disassemble and reuse.

Questions can be asked till the 8th of juli 2020. 

The questions and answers from the information meetup can be found in this file.

anoniem 30-06-2020reageer
U spreekt over een bouwsysteem. Moet dit een nieuw systeem zijn of kunnen ook bestaande bouwsystemen toegepast worden?

Ministerie van LNV 01-07-2020reageer
Het mag een bestaand bouwsysteem zijn, waarbij onderdelen vervangen zijn door materialen uit tuinbouw-reststromen.

anoniem 30-06-2020reageer
Voor beschillende bouwtypen bestaan zeer veel verschillende bouwsystemen met reststromen. Heeft u een bepaald ontwerp voor ogen, waarvoor u een bouwsysteem zoekt?

Ministerie van LNV 01-07-2020reageer
Er is nadrukkelijk geen ontwerp gevraagd in deze fase, maar een beschrijving van het bouwsysteem en de verschillende architectonische mogelijkheden / aspecten daarvan. Wat zijn de mogelijkheden van het systeem waarmee een architect zich kan uitdrukken? Welke beperkingen heeft het?

Mark Boschman 01-07-2020reageer
Goedemorgen, ik heb me aangemeld voor de uitleg van de challenge heden morgen. Gaat deze door, heb niet meer ontvangen.

Sandra Risseeuw 03-07-2020reageer
Jullie geven aan dat het realisatiebudget 50.000 euro is. Hierover enkele vragen: Zijn het alleen de bouwkosten zonder ontwerp en researchkosten? is dit excl btw? is dit excl installaties (verlichting, elektra, verwarming)? is dit exclusief aankleding binnen? En is het exclusief de fundering (we weten niet waar het op gebouwd wordt). Klopt het dat het ontwerp/advies/onderzoeksteam voor het hele project 5000 euro excl btw ontvangt?

Ministerie van LNV 04-07-2020reageer
Voor de eerste fase is €5000,- beschikbaar, waarvoor ontwerp en nauwkeurige kostenraming gemaakt moeten worden. In deze fase verstrekt de Floriade het Programma van eisen en wordt de afbakening gemaakt wat wel en niet in het realisatiebudget is opgenomen. In grote lijnen is bekend: ca. 50 m2 inclusief 8 kassa's en backoffice, isolatie eisen conform bouwbesluit. Slechts één bouwlaag, t.a.v. fundering: waarschijnlijk is de aanwezige bestrating / verharding hiervoor voldoende. Basis elektra valt binnen het realisatiebudget. Als ruwbouw = afbouw scheelt dat uiteraard aan afwerkingskosten. Zowel €5000,- als €50.000 zijn excl. BTW.

anoniem 07-07-2020reageer
In de pitch wordt gesproken over het gebruik van organische reststromen uit de tuinbouw. Is het verplicht om deze reststromen specifiek uit de tuinbouw te gebruiken? Of mag het ook (berm) grasvezels zijn die niet uit de tuinbouw komen?

Ministerie van LNV 07-07-2020reageer
Aangezien het om een tuinbouwexpositie gaat, is er voor deze challenge expliciet gekozen voor reststromen uit de tuinbouw. Zoals gesteld kunnen andere biobased materialen zoals hout en stro wel onderdeel zijn van het bouwsysteem, maar er moet substantieel gebruik gemaakt worden van tuinbouwreststromen. Bermgras kan als aanvulling daarop in het bouwsysteem gebruikt worden.

Omid Omid Hajishirmohammadi 07-07-2020reageer
Dear Team Ministry of agriculture, Thank you for providing the opportunity to practice circular economy and biomimicry principles in the built environment sector. 4 OMID has introduced 4 Circular Biomimicry Architecture style & Structure systems. which are: Versatile Demountable Variable In addition, we will introduce CBB4BE (Circular, Biomimicry Brick for the Built Environment), in the near future. 4 OMID launched on May 1st, 2020. Based in Rotterdam, the Netherlands. We are actively looking forward to engaging in partnership with like-minded partners who have experienced the use of organic residual flows from horticulture as bio-based material and experience in the construction sector in the Netherlands. Would you please connect us with other participants in this challenge. I hope via teamwork with like-minded professionals we will reach the result that It deserves this opportunity. I truly appreciate your efforts to scale the triangle of the change via escalating the cycle of hope and actions. Sincerely, Omid Hajishirmohammadi omid@4omid.com

anoniem 08-07-2020reageer
- Zijn er specifieke functies voor het backoffice voorzien? (sanitair, pantry en kleedruimte bijvoorbeeld hebben een grote impact op de lay-out). - In het tekst staat een bedrag van 50.000, in het document van de offerte aanvraag staat dat een bedrag van 139.000 genoemd. Wat is leidend? - De Floriade is tijdelijk, daarna moet het volgens de tekst elders gebruikt kunnen worden. Zijn er richtlijnen voor de levensduur?

Ministerie van LNV 10-07-2020reageer
1 Deze challenge richt zich niet op de lay out of het ontwerp van het gebouwtje zelf, maar op het bouwsysteem. 2 Zie eerdere antwoord op de vraag over het budget: 5000 voor het ontwerp, 50.000 voor realisatie ex BTW. 3 Levensduur: permanent gebruik

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