New Construction

  • Building Type : Isolated or semi-detached house
  • Construction Year : 2016
  • Delivery year : 2017
  • Address 1 - street : 11 ruelle PRIOUX 51140 JONCHERY SUR VESLE, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 145 m2
  • Construction/refurbishment cost : 220 000 €
  • Number of Dwelling : 2 Dwelling
  • Cost/m2 : 1517.24 €/m2
  • Primary energy need
    49 kWhep/
    (Calculation method : RT 2012 )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

We have made two detached houses with the MOASTEEL construction system in complete metal structure with double insulation. These two houses are built with the techno-pile system in a soil consisting of a four-meter thick silt on the water table of a stream.

The structure is prefabricated in the factory, thus reducing the means of lifting and transport compared to a traditional house. From the perspective of future regulations, this type of prefabrication is of undeniable interest in terms of the carbon footprint during the construction phase. Up to ten times lighter, the steel structure also makes it possible to build this type of house in places with complicated basements.

The construction system can be easily industrialized, giving the possibility of quickly producing large series of houses at an excellent quality / price ratio. A 30-year guarantee exists for the facade cladding.

In terms of energy performance, these low-consumption houses were built in order to limit the contribution required for heating to € 200 each year. This is achieved thanks to a double layer of GR32 glass wool insulation with a thickness of 100 mm as well as a BA13 plate.

The characteristics of the MOASTEEL construction system:

  • metallic structure which can be calculated according to the seismic and anticyclonic regulations
  • foundations without concrete with metal floor on metal piles
  • recyclable materials
  • very low carbon footprint: factory prefabricated materials and dry solution construction method fully assembled by bolting and use of self-drilling and self-tapping screws

Sustainable development approach of the project owner

The client wanted to build two houses with a new ecological technology in accordance with his political convictions and his way of life.

The technique adopted with the system of metal piles screwed into the ground also made it possible to avoid the destruction of the ground in depth, by limiting the intervention of VRD to a simple stripping of the topsoil.

Architectural description

Due to the nature of the materials used, a construction of contemporary architecture was essential for this project.

The pre-painted galvanized steel insulating panels with hidden fixings are placed directly on the metal frame and give the finished appearance of the construction.

There is no second intervention at the end of the job and the dry solution installation method keeps a job site clean throughout its duration, generating less waste and consuming little energy and no water.

Building users opinion

The owners of the house are fully satisfied with the completion of the house and one of them has ordered a 50m² extension from us. They only consume 150 € of heating per year. They were present in the house when the tree fell on the extension and after the shock and noise, they were pleasantly surprised by the resistance of the MOASTEEL construction system.

If you had to do it again?

Our technique improves from site to site. We believe that this system has a lot of future both for thermal performance and for low CO² emissions during construction, during the period of use of the building and also at the end of its life because all the elements of the covered enclosure are recyclable.

See more details about this project[…]habitat-individuel-des-trophees-batiments-resilients.html

Photo credit

Philippe Rigolot


Construction Manager


    Thermal consultancy agency


    Dani MERCIER

    Thermal study report for the building permit and completion file

Contracting method

Lump-sum turnkey

Energy consumption

  • 49,00 kWhep/
  • 65,00 kWhep/
  • RT 2012

    pellet stove + bathroom towel dryer

Envelope performance


Urban environment

  • 750,00 m2
  • 90,00 %
  • The project is located in a city of the Marne GRANDEST region of 1900 inhabitants.

    The houses are located on the edge of the stream which crosses the town and in an alley perpendicular to the National 31 which goes from ROUEN to REIMS.


    MOASTEEL Houses



    Gros œuvre / Système passif

    The MOASTEEL system makes it possible to achieve all environmental objectives.

Construction and exploitation costs

  • 220 000

GHG emissions

  • 2,29 KgCO2/m2/an
  • 50,00 année(s)

Reasons for participating in the competition(s)

The MOASTEEL HOUSE houses presented for the competition have a very low carbon footprint and top environmental performance (RE2020 E3C2). The construction system used is suitable for unstable basements, seismic zones and cyclonic zones. The weight of the whole structure is up to ten times lighter than that of a traditional house.

A large part of the elements are prefabricated in the factory in order to limit costs and simplify its implementation on the site.

On the individual houses presented here, the MOASTEEL HOUSE construction system in metal structure is completed by a double insulation implementation inside the envelope. These two houses are built on a ground consisting of a four meter thick silt on the water table of a stream.

The use of concrete has been reduced to minimum which reduces the carbon footprint of the site. It is only used for filling collaborative bins, ie a consumption of 80 liters per m² of floor space, which represents less than 11 m3 for the 140 m² house. An insulating dry floor solution on galvanized steel decks can be implemented in future constructions.

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Building candidate in the category

Bas Carbone

Bas Carbone

Green Solutions Awards 2020-2021 / France
 Winner of the Resilient Buildings Trophies Individual Housing Award housing off-site low carbon

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Philippe RIGOLOT


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Green Solutions Awards 2020-2021 / France