said that we should invent a material that releases and absorbs heat slowly, this has already existed for a long time: it is raw earth.
André De Herde: In Belgium, if you use raw earth, you will have to heat the building at some point, unfortunately, unless you accept a temperature of 16°C inside. But lime hemp plaster has extraordinary qualities.
Robert Célaire: André was referring to the latent heat during phase change, that is, materials that store energy at a constant temperature. It is a research theme.
4) André De Herde’s former graduate:
I graduated under Mr. De Herde 20 years ago. You have in front of you an exceptional person. I would like to pay tribute to him. I came to this conference to talk about him. I am here because you are the answer to the problem. You are all future architects. I have been fighting alongside Mr. De Herde for 20 years to impose this bioclimatic, to take the environment into account in architecture. This is a very difficult thing to do every day a an architect. On some projects, there is even talk of the architectural “option”. So, on the question “do architects want to be part of the problem or the solution?” I think that with this bioclimatic treatise, the architects have the solution. You all have the solution. With your BAC+6 brains, you are all able to tell everyone “we know how to manage the environment, with technical and architectural answers”. I would like to ask all of you to fight to make the profession of architects last. I would like the flaming torch to be passed on, I was one of his disciples and I would like there to be more followers. I ask you all to invest in it and believe in it, to drop all these pessimistic speeches that say that it is the end of the world. It may not be easy, but we have to keep some optimism.
The audience greatly applauded this speech.
5) Former student of ENSA Montpellier and the Réunion branch:
I am referring to the first question, and the term sustainable development. It has been said that it cannot be replaced by the word sustainable. Can we not replace it with the term “low tech”? I saw a lot of buildings which were passive, but which were not necessarily low tech or sustainable development-oriented. On the other hand, all the low tech buildings that I was able to study correspond to the criteria of sustainable development architecture.
André De Herde: That is a good suggestion. I am afraid we might stay too attached to “tech”. Sustainable development architecture also has a lot to do with the program, for example, and the situation in the city. And then, we call a table a table, and a chair a chair. So if the word consecrated by the public is “sustainable development”, why not use the word sustainable? But you have to define it. If you define “low tech” as I define sustainable, that is all right and we agree.
1 1 Available at: https://uclouvain.be/fr/facultes/loci/archi-cli.
2 2 Available at: www.matriciel.be.
This chapter comprises the words of André DE HERDE, transcribed by Marjan SANSEN.
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