Head office Hemp'it
Last modified by the author on 26/03/2021 - 10:57
New Construction
- Building Type : Office building < 28m
- Construction Year : 2019
- Delivery year : 2020
- Address 1 - street : 6 rue Louis Lumière 49250 BEAUFORT-EN-VALLEE, France
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 472 m2
- Construction/refurbishment cost : 700 000 €
- Number of Work station : 20 Work station
- Cost/m2 : 1483.05 €/m2
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Primary energy need
51.9 kWhep/m2.an
(Calculation method : RT 2012 )
Hemp construction showcase
The building is intended to accommodate research and development activity around hemp. The hemp developed in this way is intended for sectors such as textiles, the food industry and even construction. In a development logic, the building must be an example of hemp construction and a showcase for this research center as for the sector. For this reason, hemp concrete walls were intentionally left raw. The energy performance as well as the comfort of use of the building are key criteria for the company.
Low-tech and biobased energy efficiency
The bioclimatic design of the building is based on proven and low-tech principles: sun screens on the facade, a central patio that allows natural ventilation, a layout of the premises according to the course of the sun and facades adapted in terms of opening. To this is added a reflection on the materials with an insulated wooden structure in hemp concrete and cellulose wadding chosen for their density favorable to summer comfort. In short, an energy efficient building with a low carbon impact based on simple principles and requiring little maintenance.
Technical description
The wooden post-beam structure is clad with a mantle wall in wood frame insulated in wood fiber and hemp concrete. The insulated cellulose wadding roof accommodates the photovoltaic solar panels. The exterior joinery is made of mixed materials interior wood and exterior aluminum. The wall finishes are treated with lime-hemp plaster and bio-based paint with very low VOC content. A double-flow ventilation allows the renewal of the air with preheating in winter and cooling during the night period in summer.
Sustainable development approach of the project owner
HEMP-it is an agricultural cooperative company for the production and marketing of hemp seeds for industries such as textiles, agribusiness and construction.
The building is intended to accommodate research and development activity around hemp. In a development logic, the building must be an example of hemp construction and a showcase for this research center as for the sector. For this reason, hemp concrete walls were intentionally left raw. The energy performance as well as the comfort of use of the building are key criteria for the company.
Architectural description
The bioclimatic design of the building is based on proven and low-tech principles: sun screens on the facade, a central patio that allows natural ventilation, a layout of the premises according to the course of the sun and facades adapted in terms of opening. To this is added a reflection on the materials with an insulated wooden structure in hemp concrete and cellulose wadding chosen for their density favorable to summer comfort. In short, an energy efficient building with a low carbon impact based on simple principles and requiring little maintenance.
The wooden post-beam structure is clad with a mantle wall in wood frame insulated in wood fiber and hemp concrete. The insulated cellulose wadding roof accommodates the photovoltaic solar panels. The exterior joinery is made of mixed materials interior wood and exterior aluminum. The wall finishes are treated with lime-hemp plaster and bio-based paint with very low VOC content. A double-flow ventilation allows the renewal of the air with preheating in winter and cooling during the night period in summer.
See more details about this project
http://can-ia.fr/bureaux-laboratoires-sarthe/Photo credit
Can-ia
Contractor
Construction Manager
Stakeholders
Thermal consultancy agency
AXENERGIE
contact[a]axenergie.com
http://www.axenergie.com/BE Thermal
Company
JUSTEAU
V.R.D. / Big work
Company
TRILLOT
Timber frame / Roofing / Exterior walls
Company
LEVEQUE & CIE
Sealing
Company
GAUBERT – BAZANTE
Exterior wood furnishings
Company
LANGLOIS-SOBRETI
Partitions / Linings / Ceilings / Interior joinery / Modular partitions
Company
GOUIN DECORATION
Flooring and earthenware / Painting
Company
AJILIT
Plasters
Company
EIB
electricity
Company
MISSENARD
Heating / Ventilation / Plumbing
Company
PHOTOVOLT
Photovoltaic
Contracting method
Separate batches
Type of market
Global performance contract
Energy consumption
- 51,90 kWhep/m2.an
- 70,00 kWhep/m2.an
Envelope performance
- 0,88
Systems
- Electric radiator
- Aerotherm Heater
- Individual electric boiler
- No cooling system
- Natural ventilation
- Nocturnal Over ventilation
- Double flow heat exchanger
- Solar photovoltaic
- 115,00 %
Urban environment
- 42 000,00 m2
- 1,10 %
Construction and exploitation costs
- 700 000 €
Indoor Air quality
Comfort
GHG emissions
- 2,00 KgCO2/m2/an
Life Cycle Analysis
Reasons for participating in the competition(s)
La conception bioclimatique du bâtiment est basée sur des principes éprouvés et low-tech : des brises soleils en façade, un patio central qui permet une ventilation naturelle, une implantation des locaux en fonction de la course du soleil et des façades adaptées en termes d'ouverture. A cela s'ajoute une réflexion sur les matériaux avec une structure en bois isolée en béton de chanvre et ouate de cellulose choisis pour leur densité favorable au confort d'été. Pour résumer, un bâtiment efficace énergiquement à faible impact carbone basé sur des principes simples et demandant peu de maintenance.
La structure poteaux-poutres bois est habillée d'un mur manteau en ossature bois isolée en fibre de bois et béton de chanvre. La toiture isolée en ouate de cellulose accueille les panneaux solaires photovoltaïques. Les menuiseries extérieures sont réalisées en matériaux mixtes bois intérieur et aluminium extérieur. Les finitions murales sont traitées en enduits chaux-chanvre et peinture biosourcée à très faible teneur en COV. Une ventilation double-flux permet le renouvellement de l'air avec préchauffage en hiver et rafraichissement en période nocturne l'été.