Contractor

Name : Privé

Construction Manager

Name : Silo architectes

Contact : yann[at]siloarchitectes.fr

 http://www.siloarchitectes.fr

Stakeholders

Function : Company

Ets Mordenti

Cyril Mordenti

Stone masonry, concrete masonry, sanitation and VRD

Function : Company

Les toits du Trièves

Lionel Cassaro

Framework, roofing, zinc work and roof insulation

Function : Company

ALEC

Alexis Rey-Galiay

Strong and weak current

Function : Company

Lehmann & fils

Peter Lehmann

Plumber heating

Function : Others

AQUATIRIS

Aurélie Daumergues

 https://www.aquatiris.fr/


pre-studies, materials supplier and support for self-construction for the phyto-purification sanitation system

Contracting method

Separate batches

Type of market

Global performance contract

Energy consumption

Breakdown for energy consumption : - The heating and domestic hot water consumption comes from the same pellet boiler without an independent calorie counter. Last year's annual consumption was 2600 kg of pellets. This corresponds to approximately 11,800 kWh for a 236 m² building, knowing that 1 kWh = 0.22 kg of pellets. We therefore obtain a consumption of around 50 kWh/m².year. - Power consumption supports lighting and household appliances, but we don't have data on it. - No ventilation consumption because it is natural. - No cooling in the project.

Envelope performance

More information :

As expressed above, no calculation has been made, we have just largely exceeded the requirements of RT 2005.
- The concrete slabs are insulated on the underside with a side thermal bridge breaker with 100mm thick polyurethane with an R = 4.65.
- The roof is insulated with 340mm of cellulose wadding, density 60 kg/m3, i.e. an R = 8.1.
- The facades are insulated in ITI with hemp lime concrete with a thickness of 200mm for an R = 2.6. This value is only a numerical value which does not reveal all the qualities of this product which is an insulator with inertia (theoretically impossible for thermal software).

• Building Compactness Coefficient : 0,60

More information

The consumptions that we have sent to you concern the actual consumption of the 1st year elapsed. There was no prior thermal simulation because, for economic reasons for the customer and for regulatory reasons, we were not obliged to make this calculation. Nevertheless, we are well above the performance required by the RT 2005.

Systems

Heating system :
• Wood boiler
Hot water system :
• Wood boiler
Cooling system :
• No cooling system
Ventilation system :
• Natural ventilation
Renewable systems :
• Wood boiler
• Renewable energy production : 100,00 %
Solutions enhancing nature free gains :

La ventilation est naturelle et ne produit donc pas de consommation.

Risks

Hazards to which the building is exposed :
• Flooding/Fast Recession

Risks measures put in place :

The plot is located in low landslide hazard. In order not to aggravate the risk and to respect infiltration on the plot, we worked with the KAENA geotechnical study office, which helped us to size an infiltration structure using a MATSUO method. This resulted in the creation of a drainage trench with a storage volume of 21.6 m3 capable of coping with ten-year occurrences of rain with a leakage rate set at 0.05 liters / second.

Urban environment

• Land plot area : 2 288,00 m²
• Built-up area : 300,00 %

The building is located in a rural agricultural setting. It is located 10 minutes by car from the nearest town center. A small communal road gives access to the house as well as to 5 other neighbours. The plot is bordered by forest and exploited agricultural field.

Product

Hemp lime concrete



Saint Astier

 https://www.saint-astier.com/


Product category : Finishing work / Partitions, insulation

Construction and exploitation costs

• Renewable energy systems cost : 11 963,00 €
• Cost of studies : 35 000 €
• Total cost of the building : 350 000 €

Reuse : same function or different function

Batches concerned by reuse :
• Structural works

For each batch : Reused Materials / Products / Equipments :

The project is the subject of a strong deconstruction of the original stone masonry. These walls were reassembled by the mason associated with concrete chaining. The reused volume of stone is around 50 m3.

Indoor Air quality

Natural ventilation installed.

The occupants ventilate their accommodation by opening the windows with ease.

Comfort

Health & comfort :

The living space benefits from 2 large bay windows overlooking the ground level. The ground floor is therefore accessible and in continuity with the access to the land.

The hemp lime concrete used in interior insulation is a powerful regulator of wall temperature and interior humidity. Thus, in winter, it stores humidity, and in summer, it restores it, functioning as a passive cooler. In addition, this insulating material having inertia, the heat produced in winter is stored in the walls, and even when opening the windows to ventilate the building naturally, a large part of the calories do not escape. .

Acoustic comfort :

Through the roughness of the hemp-lime concrete, the exposed joists and the non-orthogonal geometry of the volumetry of the building, the acoustic comfort is exceptional.

GHG emissions

Methodology used :

Project too small to be able to pay for this kind of study

• Building lifetime : 50,00 année(s)

Life Cycle Analysis

Eco-design material :

We used wood for the frame, wadding for roof insulation, hemp lime concrete in ITI, wood exterior joinery.