Insulating your house is an investment for the future. And for good reason, insulating a house can significantly reduce your heating bills. But what is the budget for insulating a house? And what does the price of insulating a house depend on?
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A good insulation thermal and acoustic improves daily living comfort. Insulating your house also allows you to save on your energy bill, by reducing energy losses. heat. What budget should you plan to insulate your house? Discover the price of insulation of a house inside and out, to get a clear idea of a house’s insulation budget.
How much does it cost to insulate a house from the inside?
Insulating a house from the inside can save you up to 15% on your energy bill (and sometimes more if you insulate an older house). Insulating from the inside consists of laying insulators at the level of walls, attic, ceiling and / or floors. The insulation is then protected by partitions, often in plasterboard.
Insulating a house from the inside is a less expensive solution than insulating a house from the outside, but it has the disadvantage of damaging your interior space.
On average, the the price of insulating a house from the inside is between 10 and 60 € per m², installation included, depending on the place to be insulated. Finishes and interior fittings that follow interior insulation may slightly increase this budget.
Price per m² of interior wall insulation
The insulation of a house is often done at the level of the walls, in order to reduce thermal bridges where the nuisances sound between rooms or from outside.
In fact, 25% of heat loss comes from the facades of housing. the price per m² of interior wall insulation is between 10 and 30 € on average. Insulate walls from the inside slightly reduces your interior surface, since you have to lay not only a layer of insulation, but also a plasterboard to conceal the latter.
Price per m² of the insulation of an interior roof
The insulation of the roof from the inside often involves the insulation of attic lost or convertible. On average, the price of insulation per m² of the interior roof varies between 10 and 60 €.
The price of insulating lost attic is often lower than that of habitable attic, because it is a much simpler operation and requires less finishing.
Price per m² of floor and ceiling insulation
Floor and ceiling insulation is mainly carried out to reduce noise pollution between two floors. This type of work therefore improves the acoustic comfort of the house, especially in an old house or in an apartment.
the price per m² of floor and ceiling insulation is between 20 and 50 € for the floor, and between 10 and 30 € for the ceiling. Here is a summary table of the cost of insulating a house from the inside:
| Insulating a house from the inside | Price of the insulation of a house |
| Interior wall insulation | Between 10 and 30 € per m² |
| Interior insulation of the attic | Between 10 and 60 € per m² |
| Interior floor insulation | Between 20 and 50 € per m² |
| Interior ceiling insulation | Between 10 and 30 € per m² |
What is the cost of exterior house insulation?
Insulating the house from the outside is more expensive, but also more effective than insulation from the inside. Indeed, insulating a facade or a roof from the outside removes all thermal bridges, and therefore creates flawless insulation. On the contrary, insulating from the inside leaves defects in the insulation, for example at the level of the floors.
Thermal insulation from the outside (ITE) can be carried out at the level of the roof or the facade of the dwelling. On average, the cost of insulating a house from the outside is between 70 and 200 € per m². This operation therefore requires a substantial budget.
Insulation price per m² of the walls from the outside
The thermal insulation from the outside (ETI) of a house reduces the heating needs of the house and improves its energy performance. The laying of a material insulation such as cladding and plastered panels on exterior walls also allows renovate its facade.
On average, the price of insulation per m² of the walls from the outside varies between 70 and 120 €, depending on the type of insulation used. This budget is important, but don’t forget that it allows for a complete facade renovation. And for good reason, the exterior facade insulation is protected by cladding or by panels to be coated, which means that your facade will be like new after such an operation.
Insulation price per m² of the roof
Insulating the roof from the outside, also called sarking, is an effective technique for reducing thermal bridges. In fact, 25 to 30% of heat loss comes from a poorly insulated roof. the price of the insulation of the exterior roof is between 100 and 200 € per m² on average.
Once again, this is a very large budget, since such an operation requires removing your roof covering completely, before putting it on again. It is therefore better to plan this type of work than when you are planning a complete roof renovation.
What aids for the insulation of a house?
If the price of insulating a house can be high, it is nevertheless possible to benefit from aid for energy renovation.
Carrying out insulation work in your house can make you benefit from various aids and subsidies, if a certain level of performance is reached. In order to finance the project, it is in particular possible to request:
- The help of Ma prime Rénov,
- The zero-rate eco-loan,
- The certifications savingenergy (EEC),
- The Live Better Serenity aid from the ANAH,
- Local aid.
To benefit from these aids, the work must be entrusted to an RGE certified craftsman and meet the conditions ofeligibility. Also, remember to fill out your assistance request files BEFORE signing any estimate.
Do you need free quotes to estimate the price of insulating a house? Completing the form below allows you to receive different insulation quotes, without any commitment.
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