Insulation has a significant impact on a household’s comfort level and energy bills. This correlation is particularly remarkable in living rooms. You tend to spend more time in these places. With poor insulation, you risk requiring more heating and increasing the energy costs of your home.
Why is proper home insulation important?
heating andhouse insulation are two complementary aspects of your daily thermal comfort. You will indeed need to heat your home more in the event of a significant caloric loss. On the other hand, you can spare the heating system, if the building is well insulated. A thermal strainer may even require the purchase of a powerful, expensive and energy-consuming device.
However, it is enough to limit heat loss to reduce your heating needs. You can then optimize the efficiency of your equipment and lower your energy bills. According to Ademe, heating consumes 62% of the energy paid by the French each year. You will therefore have the possibility of making considerable savings by improving the insulation of your home.
Insulation is also decisive for the energy efficiency of a house in all seasons. In winter, it is mainly used to prevent heat from escaping from your home. On the other hand, it helps to preserve the coolness inside when it is particularly hot outside. Thus, you will spend less energy on air conditioning or ventilation.
In short, good insulation makes it possible to limit your energy consumption in winter and summer. It also contributes to reducing your greenhouse gas emissions and your climate impact. As a result, the public authorities have been encouraging energy renovation operations for several years. This incentive translates into various financial aids at the national and local level.
What parts of the house should be properly insulated?
You must target the main areas of heat loss as a priority to effectively improve the insulation of the house. These points should also be monitored on aging buildings. Typically, an uninsulated house loses heat by:
- 20 to 30% in coverage;
- 20 to 25% through air ducts;
- 15-25% through walls;
- 10 to 15% through openings, especially windows;
- 7 to 10% via low floors;
- 5 to 10% due to thermal bridges.
You are supposed to simultaneously treat these problem places to eliminate heat loss in your dwelling. Nevertheless, you can proceed in order of priority according to your budget and your availability. The work can also be prioritized according to the savings that can be made. Concretely, it will start with the attic and the roof.
Exterior insulation eliminates most thermal bridges and preserves the living space of the house. In addition, the work is less invasive on a daily basis. However, this solution is expensive. Thus, individuals often prefer interior insulation, despite its consequences on the size of living rooms.
How much does it cost to insulate a house?
the home insulation cost can be a deterrent if you disregard the aid available. Fortunately, the State has set up mechanisms to finance the thermal renovations of homes. External insulation is generally more expensive. It costs between 70 and 200 euros per square meter. By way of comparison, the interior method requires an average of 10 to 60 euros per square meter.
That said, exterior insulation performs better than interior techniques. It is thus decisive on the EPB certificate of a house because of its effectiveness against thermal bridges. Conversely, interior insulation often has flaws at floor level. The ITE (thermal insulation from the outside) also makes it possible to renovate the facade and the roof of old buildings.
As an indication, this method costs between 70 and 120 euros per square meter on walls. On the other hand, it will be necessary to provide 100 and 200 euros for the ITE of the roof. This price is largely explained by the importance of the work. You will actually have to remove and then reapply your cover. For interior insulation, prices vary between:
- 10 and 30 euros per square meter for the walls;
- 10 and 30 euros for the ceiling;
- 10 and 60 euros for the attic;
- 20 and 50 euros for the floor.
In all cases, the estimate will be largely based on the insulation solutions chosen (cladding, panel, coating, etc.). However, you can limit the expenses thanks to the bonuses dedicated to energy renovation.
What bonuses are available?
You currently have access to various help to carry out the thermal renovation of your house. In general, the premiums are conditioned by the energy performance achieved after the intervention. Eligibility may also depend on your income on certain public schemes. To finance this type of work, you can request:
- MaPrimeRénov’ Serenity (ex-Habiter Mieux Sérénité of the ANAH);
- The EPTZ (zero rate eco-loan);
- EECs (energy saving certifications);
- Local subsidies offered by municipalities, departments, regions, etc.
On the other hand, you must entrust the operation to an RGE-certified craftsman to obtain most of these financial aids. However, the steps depend on the device in question. Therefore, it is important to build the file and complete the request before validating the quotes.