Stakeholders

Function : Contractor

SCI Vallée de la Bièvre

7 Avenue Descartes - 92350 Le Plessis Robinson

Function : Designer

Dumont Legrand Architecte

1 rue du Lieuvin - 75015 Paris

 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

BET Structure, Thermal and Envelope

Function : Other consultancy agency

ATELUX

13,Rue du Clos d'en Haut - 78700 Coflans-Saint-Honorine

 http://atelux.fr/


Fluid Design Office

Function :

JR BAT

20 rue Pierre Mendès France - 77200 Torcy

General Enterprise

Contracting method

General Contractor

Type of market

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Energy consumption

• Primary energy need : 48,30 kWhep/m².an
• Primary energy need for standard building : 130,00 kWhep/m².an

Calculation method :

Breakdown for energy consumption : Heating: 21.8 DHW: 17.8 Lighting: 6.2 Auxiliary: 2.6

• Initial consumption : 48,30 kWhep/m².an

Real final energy consumption

Final Energy : 43,00 kWhef/m².an

Envelope performance

• Envelope U-Value : 0,36 W.m^-2.K^-1
More information :

Timber frame, filling hemp concrete
Exterior lime plaster with Fermacell panels

• Building Compactness Coefficient : 0,84

Indicator : I4

• Air Tightness Value : 0,85

Systems

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

Enveloppe performante, bioclimatisme.

Urban environment

• Land plot area : 5 343,00 m²
• Built-up area : 22,50 %
• Green space : 1 480,00

ARCHITECTURAL FIGURES The constructions made, with rights-of-way and templates close to those of the existing buildings, are located nearest to the existing site. The North Building Corps is thus located in alignment with the north boundary line leading to rue de la Folie in Parcel 107. The west building is located on the right-of-way of the existing building. This layout preserves the common central space, which then becomes both a serving place and a space shared by the inhabitants. DISTANT VIEW The will is to create a harmonious built front, visible from the bottom of the village, thus agreeing with the neighboring bourgeois house as with the meadow in the foreground. The striking figure of the Grange remains present, by the restoration of its gables between which the new construction is inserted. The maintenance of an unconstructed zone articulating the two building bodies at the bottom of the plot allows to maintain the views towards the village and the valley from the central courtyard. In order to avoid any effect of detached houses, the houses fit into these linear and continuous templates. VIEW OF THE VILLAGE In order to preserve as much as possible the perception of the place from the borough, the garage rests on the stone wall existing on the boundary of property, itself restored. For the same purpose, the gauge of the garage restores to the best the template of the existing building while taking into account the constraints related to its new assignment. The parking spaces are thus covered by a double slope roof supported on the existing wall of enclosure. At the level of the entry on the ground, the roof, higher, is treated in the spirit of a pigeon, recalling the template of the existing building.

Product

Tradical Hemp Concrete



Tradical

[email protected]

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


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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 : 210 000 €
• Total cost of the building : 2 000 000 €

GHG emissions

• GHG in use : 7,20 KgCO₂/m²/an
Methodology used :

RT 2005

• GHG before use : 48,00 KgCO₂ /m²
• Building lifetime : 100,00 année(s)

, ie xx in use years : 6.67

• GHG Cradle to Grave : 765,00 KgCO₂ /m²

Life Cycle Analysis

Eco-design material : Structure and timber framing Complete insulation of the hemp concrete casing Insulation of wooden interior floors