The Orangery: a raw earth building within Confluence
- Building Type : Office building < 28m
- Construction Year : 2018
- Delivery year : 2020
- Address 1 - street : 3 rue Jacqueline et Roland de Pury 69002 LYON, France
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 1 055 m2
- Construction/refurbishment cost : 2 243 801 €
- Number of Work station : 84 Work station
- Cost/m2 : 2126.83 €/m2
Primary energy need
(Calculation method : RT 2012 )
Within the Ydéal Confluence operation, the Orangery is an office building in R+2 built in adobe (raw earth) load-bearing and equipped with a wooden frame. The natural insulating qualities of rammed earth make it an energy efficient building, so it does not need to be air conditioned. The materials (earth and wood) are exclusively from the Rhône-Alpes region. The building is NF HQE, Effinergie+ and BREEAM Excellence certified, and the operation won the silver pyramid regional grand prize and the low carbon vermeil pyramid at the 2019 FPI trophies.
Sustainable development approach of the project owner
Through its projects, both residential and tertiary, OGIC promotes four main axes: a greener city, more resource efficient, more united and more beautiful. This philosophy has resonated with the ambitions of the SPL Lyon-Confluence, and has made it possible to develop in this former industrial area in the heart of Lyon the city of tomorrow, more sustainable and smarter.
Rammed earth is an ancestral method of construction in the Rhône-Alpes region but it had never been used for a building of this height (R+2) with such a structure endowed with large arches. The objective was to build a sober and sustainable building, both through its construction system using local and natural materials (load-bearing rammed earth structure, stone foundations, and wooden frame) and in use, rammed earth being a excellent natural insulator which makes it possible, among other things, to dispense with air conditioning in summer. it is a demonstration building in view of future climate change.
The undeniable success of this project has led OGIC to consider the use of adobe in other projects and to develop innovative and ecological construction methods.
The building in R+2 within a block made up of 3 other buildings in R+7 and one in R+8 makes it possible to open the latter on the street and the district, instead of locking it up. In addition, the choice to equip it with large arches evoking orangeries such as that of the Parc de la Tête d'Or (hence the name "L'Orangery") makes it naturally luminous and inscribes it in architectural history. from Lyon.
The choice of materials was also guided by a real green ambition: the earth (which requires a certain level of clay to be viable) comes from Saint-Quentin-Fallavier, 30 kilometers from Lyon, and the wood from the French Alps. .
See more details about this projecthttps://www.groupe-ogic.fr/realisation/ydeal-confluence-lyon/
Perspectives and plans: Clément Vergély Architects, Asylum
Photos on site: Olympe Nergoux
Construction of the rammed earth structure
Thermal consultancy agency
HQE design office
Sealing of the building
VRD and green spaces
Plumbing - Heating - VMC - Bathroom furniture
Exterior wood joinery
Type of market
Global performance contract
- 74,00 kWhep/m2.an
- 150,00 kWhep/m2.an
- Urban network
- Urban network
- No cooling system
- Double flow heat exchanger
- Solar photovoltaic
- 34,00 %
- 3 995,00 m2
Construction and exploitation costs
- 2 243 801 €
- 5 078,00 €
- 2,00 KgCO2/m2/an
Reasons for participating in the competition(s)
The Orangery is a fundamentally sustainable building, both in its construction method (use of natural materials originating in the Rhône-Alpes region) and in its use: energy savings (heating, air conditioning, electricity) obtained thanks to the insulating qualities of rammed earth. which does not require air conditioning in summer and large glazed openings, water savings by the use of rainwater in the toilets, green roof contributing to demineralize the city.