- Building Type : Isolated or semi-detached house
- Construction Year :
- Delivery year : 2018
- Address 1 - street : rue des Américains 103 7022 HYON, Belgique
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 293 m2
- Construction/refurbishment cost : 178 000 €
- Cost/m2 : 607.51 €/m2
Primary energy need :
(Calculation method : RT 2012 )
"Projet 103" consists of the renovation of an old and unhealthy house. The objective was to reach the "Q-ZEN" energy standard (2021 standard in the Walloon Region, Belgium) at the end of the renovation while doing without fossil fuels: only a wood stove provides heating for the house.
The programme includes insulation of the envelope (with, in particular, bio-sourced insulation for the roof: Gramitherm), careful airtightness, double flow ventilation and photovoltaic panels.
The label of the house is A+, which is better than what is required for a new house in 2021.
3rd part certified
DesignerHomeco architecture Xavier Bachelart architect
Owner approach of sustainability
The aim was to carry out a renovation (environmental impact of a renovation vs. new construction) of a house in an urban context (proximity to services, public transport, etc.).
The objective of the renovation was to show that it is possible to achieve high energy performance (A+ label) without the use of fossil fuels (only a wood-burning stove heats the house) and by using bio-based materials (gramitherm insulation on the roof).
The consumption of the house is currently 0 € (wood recovered from neighbours, electricity compensated by photovoltaic panels).
In terms of biodiversity, a permaculture vegetable garden, a greenhouse and a henhouse have been installed.
Work on the building envelope:
- external insulation of walls ;
- insulation of the attic floor;
- triple glazed aluminium joinery;
- insulation of the floor slab and the cellar ceiling;
- work on the airtightness.
- Heating by wood stove (independence from fossil fuels);
- Domestic hot water by electric boiler (simplicity of installation);
- double flow ventilation system with heat recovery;
- photovoltaic panels to compensate for electricity consumption.
- 44,00 kWhep/m2.an
- 510,00 kWhep/m2.an
- 40,00 kWhef/m2.an
- 658,00 kWhep/m2.an
- 0,33 W.m-2.K-1
- 5,00 Test blower door
- 1,00 KgCO2/m2/an
- 120,00 KgCO2 /m2
- 50,00 an(s)
- 30,00 m3
- 40,00 m3
Indoor Air quality
Second œuvre / Cloisons, isolation
Happy to test this bio-based, innovative and local solution
Double flow ventilation
Génie climatique, électricité / Ventilation, rafraîchissement
Double flow ventilation
Improved air quality, night cooling in summer
Génie climatique, électricité / Chauffage, eau chaude
Wood stove "heat", independence from renewable energy
20 solar panels of 270 Wp
Electricity bill at 0
Second œuvre / Peinture, revêtements muraux
Velvety matt acrylic paint, almost solvent-free and plasticizer-free, very washable.
Solvent-free paint used throughout the house to minimise the air quality impact of finishes
Existing house on the outskirts of an urban centre (city of Mons).
A bus line passes in front of the building (bus stop a few dozen metres away).
A cycle track is in front of the building (see photo).
A permaculture vegetable garden has been set up in the garden with a chicken coop and a greenhouse.
Parking spaces are located on the side of the building.
Annex buildings accommodating bicycles.
Reasons for participating in the competition(s)
The main objective of the project is to show individuals and professionals that it is possible to achieve high energy performance in renovation. The building has an A+ label (better than the requirements for new buildings in 2021).
The second objective is to show that the first is achievable by using locally produced bio-sourced materials (Gramitherm, grass-based insulation, produced in Auvelais, Belgium).
Finally, the third objective is to do without fossil fuels in order to reduce the carbon footprint of the building as much as possible.