- Price of different insulators
- Cost of insulation work
The insulation of a home is a significant budget but it is work to subsequently achieve significant energy savings and secondly, various aids or subsidies can reduce the bill.
Price of different insulators
There are many materials that can be used for insulation. Each material has a different energy performance. If your budget allows, choose an insulation with a high thermal resistance R. Although more expensive to buy, it will quickly pay for itself by its insulation capabilities.
Here is a table showing the price of different insulators according to its thermal resistance and its thickness (prices given as an indication):
R (m² k / W)
Price (€ / m²)
Rockwool PSE (associated with a 10mm plasterboard)
Feather (70% duck)
2,40 à 2,50
19,42 à 25,12
Cost of insulation work
The cost of insulation work can be very variable depending on the region, the company doing the work and the materials used. Here at indicative title the average price insulation work according to the areas of the house concerned.
- Attic space: 10 to 15 € / m²
- Habitable roof spaces: 50 € / m²
- Wall, interior insulation: 20 to 50 € / m²
- Wall, external insulation: 40 to 80 € / m²
- Floor: 10 to 30 € / m²
Aid and subsidies
Under certain conditions the price of insulation of your home can be lightened thanks to various state aids.
Tax credit for sustainable development
The tax credit for sustainable development can be issued if the insulation work is carried out in your principal residence or in a dwelling of more than two years of which you are the owner and which is intended for the unfurnished renting for a minimum duration of 5 years.
The tax credit applies to the purchase price of the insulation materials indicated on the invoice of the company that carried out the work
Some insulation work can benefit from an important VAT reduction. This can be reported at 5.5% under certain conditions. For this it is necessary that the work is carried out by a company with the aim of improving the energy performance and that the house is more than 2 years old.
Eco-loan at rate 0
Works that improve the energy performance of a home can benefit from the eco-loan rate 0.
The maximum amount of eco-loan rate 0 is € 30,000 per unit, repayable without interest.
Grant issued by the National Agency of Habitat (ANAH)
In the context of energy saving works such as insulation, the ANAH can pay a grant, provided that they are carried out by professionals.