Stakeholders

Function : Contractor

RIVP

 http://www.rivp.fr/

Function : Designer

DLA Dumont Legrand

[email protected]

 http://dumont-legrand.fr/


Project manager

Function : Other consultancy agency

LM Ingénieur

Laurent Mouly - 13, rue Chapon - 75003 Paris - Tél : 01 40 29 96 92

Design, Structure, Thermal, Envelope

Function : Other consultancy agency

ATELUX

Atelux - Conflans 13 Rue Clos d'en Haut 78700, Conflans-Sainte-Honorine - Tél : 01.39.72.81.33

 http://atelux.fr/


Fluid design office

Function : Company

Bati-Rénov

Bati-rénov 20 rue Christophe Colomb, 94310 ORLY +33(0)1 80 61 63 00 - [email protected]

 http://www.bati-renov.fr/


General Enterprise

Function : Company

SMB

Stéphane Maillochon - 02 48 61 45 16

 http://maillochon-batiment.fr/


Company hemp concrete and plasters

Type of market

Realization

Energy consumption

• Primary energy need : 78,90 kWhep/m².an
• Primary energy need for standard building : 130,00 kWhep/m².an

Calculation method : RT 2005

Breakdown for energy consumption : Heating: 49.0 DHW: 29.6 Lighting: 4.3 Auxiliary: 3.0

• Initial consumption : 278,90 kWhep/m².an

Real final energy consumption

Final Energy : 73,80 kWhef/m².an

Envelope performance

• Envelope U-Value : 0,71 W.m^-2.K^-1
More information :

Exterior lime / hemp insulation: 4 cm
Existing solid stone: 40 cm
Insulation hemp projected interior: 10 cm
Finish lime / hemp or Fermacell (wet rooms)

• Building Compactness Coefficient : 0,78

Indicator : I4

• Air Tightness Value : 2,36

Systems

Heating system :
• Individual gas boiler
Hot water system :
• Individual gas boiler
Cooling system :
• No cooling system
Ventilation system :
• Natural ventilation
• Humidity sensitive Air Handling Unit (Hygro B
Renewable systems :
• No renewable energy systems
Solutions enhancing nature free gains :

Enveloppe performante et durable. Intervention adaptée aux maçonneries existantes. Préchauffage passif et naturel de l'air neuf.

Urban environment

• Land plot area : 129,00 m²
• Built-up area : 100,00 %

The building was built in the second half of the 18th century. This building is located at the corner of two streets, so it has a façade on the Rue de la Huchette and a façade on the Rue Xavier Privat. The building was once part of the 10th arrondissement of the Sorbonne district. At the beginning of the 19th century, the number 18 of the street of the Huchette corresponded to number 20. The change of number having been made during the second half of the 19th century. The Rue Xavier Privat also underwent a change, it was formerly that of the 3 Chandeliers located in the continuation of the street Zacharie.

Product

Tradical Hemp Concrete



Tradical

[email protected]

 http://www.bcb-tradical.com/fr-beton-de-chanvre-pour-une-isolation-naturelle.html


Product category : Second œuvre / Cloisons, isolation

Contrary to what its name suggests, hemp concrete has nothing to do with traditional concrete. Non-structural, it is an insulating and ecological filling material. Its installation on supporting framework (generally in wood) is apparent to the historical constructive principles of dense urban environments: constructions with pan of wood and pan of iron. Conjugating the qualities of hemp and lime, it is projected horizontally on a temporary or permanent formwork bottom. It ensures a distributed insulation of the construction, significantly reducing thermal bridges. The hygroscopic nature of hemp gives the walls a healthy and natural breathing, avoiding the effect "tight box". Its inert character improves the comfort of summer and winter. Finally, hemp concrete is not limiting and allows to realize all types of facade (wood cladding, zinc, plaster ...) The use of hemp concrete allows an energy sobriety, a sobriety constructive and an environmental sobriety . On this building, Tradical Hemp Concrete is used for 2 applications. In a wall with distributed insulation, it constitutes the walls of the exterior facades walls street and side courtyard. It is applied mechanically in filling between slabs. It is also used in roofing with distributed insulation.

The sensitivity of the developer and the project management team to biosourced materials naturally led them to choose hemp concrete. The skills of the general company in this field have been a real benefit for the project.

Construction and exploitation costs

• Cost of studies : 180 000 €
• Total cost of the building : 1 700 000 €

GHG emissions

• GHG in use : 12,30 KgCO₂/m²/an
Methodology used :

RT 2005

• GHG before use : 151,00 KgCO₂ /m²
• Building lifetime : 100,00 année(s)

, ie xx in use years : 12.28

• GHG Cradle to Grave : 1 381,00 KgCO₂ /m²

Life Cycle Analysis

Eco-design material : Insulation of hemp concrete facades Wood joists Wood fiber insulation