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About

RHEA,

Equipment

2018

The project for the Zone d'Activité Economique des Lavandières, located in Le Mesnil-Amelot, north of Paris, provides for the development of an office building and business premises, with a total surface area of more than 3,000 m2. Aware of the impact of such a construction, we sought to offer the client a basic material which, by its intrinsic qualities, could reduce the ecological footprint of the project. We then turned our attention to limestone, which is naturally present in the region's subsoils (Oise quarries). Apart from its extraction, transport and implementation, it requires no additional energy expenditure or surface treatment (no heat, no offcuts, no coating, no chemicals). It is a raw material resulting from slow maturation on a geological scale. It keeps in it the traces of nature's fluctuations but also the memory of its equilibrium. The beauty of its texture echoes this tumultuous past, a fusion of coloured strata, translucent minerals and organic fossils. We propose to use it in massive structural blocks to take advantage of its qualities of inertia, naturally regulating the temperature differences between seasons. This stone is also relatively permeable to water vapour. It therefore allows a passive hygrometric regulation. In this way, we avoid creating "thousand sheet" façades made of layers of concrete, plastics, aluminium, bitumen and insulation, each of which generates a lot of waste. At this stage of the project (APD), the use of this particularly efficient material has been validated for office facades. We are currently working on the definition of the envelope of the business premises in the same approach to reduce the ecological footprint.

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