Energy renovation concerns all work on buildings already constructed to improve their energy performance. Encouraged by public authorities since the 70s, it aims to reduce the energy consumption of a building. What work is done during this operation, and how much does it cost?
Energy Renovation Works
Several works are carried out for an energy renovation operation to guarantee the occupants’ well-being. Their realization sometimes requires machines like the truck crane. Thus, we find insulation work, work on ventilation, and work on the heating system.
Insulation work
This is the most vital work to be done during a renovation. Indeed, according to studies carried out in 1975, a quarter of the energy losses in houses occur through the roofs and walls and 10%-15% through the windows. Thus, with the improvement of the thermal insulation, a reduction in energy consumption is obtained up to 60%. This offers a reduction in bills, savings on heating, etc.
Work on Ventilation
The ventilation works allow ensuring the renewal of the air and the evacuation of the humidity. It consists in installing controlled mechanical ventilation with simple or double flow. But the installation of distributed mechanical ventilation could also be considered.
The latter does not require an evacuation duct to the outside. This work can also be done on your windows, which can become double or triple-glazed. In this case, they offer good insulation during the winter and good conservation of freshness during the summer.
Work on the Heating System
At this level, you must choose very efficient equipment to reduce your energy bill. Condensing gas boilers, heat pumps, or boilers with suction cups are recommended, as well as freshwater radiators against conventional radiation.
The option of wood or solar heating systems also helps save energy. Do it yourself if you have some DIY skills.
Cost of an Energy Renovation: The Influencing Factors
The price of an energy renovation varies according to several factors. They will make the renovation either more expensive or cheaper.
The Type of Renovation
A renovation will cost more or less depending on the type of renovation chosen by the owner, either a partial or total renovation. Renovating all the energy aspects of a building will cost more, but a partial renovation will not require such a large budget.
The Work to Be Done
Insulation work requires significant work and will cost more than ventilation work, for example. Moreover, their prices depend on the type of insulation chosen. For exterior insulation, you need to budget between 80 and 120 euros per square meter, and attic insulation will cost between 35 and 70 euros per square meter.
When the work consists of replacing windows, the range of expenses is between 150 € and 800 € depending on the material, the range, and the product’s dimensions. As for the boiler, its installation is between 4000 and 8000 € TTC when it is of good quality and efficient.
The Condition of the House
The cost of this operation also depends on the condition of the house. An old house will have higher renovation costs than a recent house. For your safety, you should check the date of construction if you are buying a house to renovate it.
For an old house with high energy consumption, going from the G energy label to the C or D label, the renovation cost will be at least 200 euros per m².
For a less energy-intensive property for which an excellent energy performance is aimed at, up to the RT2012 thermal standards (50 kWhep/m²/year), the price of the energy renovation will be between 400 and 450 euros per m².
In the end, the cost of energy renovation of a building is difficult to evaluate, and only an estimate can show reliable and precise amounts for each operation. Do not hesitate to call a professional to evaluate your estimate.
