Mon logement est ancien, puis-je faire une ITE ?

Oui, l'isolation thermique par l'extérieur est tout à fait compatible avec les maisons anciennes. Il suffit d'adapter les matériaux et les finitions pour respecter l'aspect de la façade existante. Un diagnostic préalable est recommandé.

Dois-je faire une déclaration de travaux pour une ITE ?

Oui, dans la plupart des cas, une déclaration préalable en mairie est nécessaire, surtout si l’ITE modifie l’aspect extérieur de la façade (enduit, couleur, bardage...).

Quelle est la meilleure saison pour faire une ITE ?

Le printemps et l’automne sont les périodes idéales pour faire une ITE. Les températures sont plus stables, ce qui permet une meilleure application des enduits ou des colles isolantes, tout en évitant les pics de chaleur ou les fortes pluies.

Puis-je combiner ITE et ravalement de façade ?

Oui, c’est même fortement recommandé. Réaliser une ITE en même temps qu’un ravalement permet de faire des économies sur le chantier et de bénéficier d’aides financières comme MaPrimeRénov’ ou les primes CEE.

External thermal insulation (ITE) – Complete guide to better isolate your home in 2025

Outdoor thermal insulation (ITE) is now one of the most effective solutions to reduce your heating bills, improve your comfort and enhance your home. Still little known, she raises a lot of questions: how does it work? What's the price? Can we apply it to an old house? What aids are available in 2025? This complete guide answers all your questions whether you are a landlord, trustee or lessor.

Why isolate your home from the outside?

THERE is to put a layer of insulation all around the facade, then to cover it with a coating or a cladding. It's a solution 3 in 1 :

✔ It thermally isolates your home (summer and winter)
✔ Renovates and embellishes your façade
✔ It avoids thermal bridges (unlike internal insulation)

Is it suitable for all houses?

THEITE is compatible with:

Old houses (even stone or brick)
The pavilions of the 1960s and 1990s
Recent low performance housing

📌 Good to know: there are Specific insulation to respect the appearance of traditional facades.

How much does an outside thermal insulation cost in 2025?

💰 In 2025, the average price of an ITE varies between 110 and 190 €/m2 TTCAccording to:

Thickness and insulation type (rock plain, polystyrene, wood fiber...)
The total area to be isolated
The choice of finish (coated, creped, wood or PVC slatting)
The complexity of the project

👉 This cost may be aid in force.

What financial aid in 2025?

Good news: there are many grants available to finance your IT project:

✅ MaPrimeRenovation (up to 75 €/m2 according to your income)
✅ EEC premium (Energy saving certificates)
✅ VAT reduced to 5,5 %
✅ Eco-loan at zero rate
✅ Local aid (departmental or regional)

Inside or outside insulation: what to choose?

Criteria	ITE (outside)	Internal insulation
Thermal performance	⭐⭐⭐⭐⭐	⭐⭐⭐
Loss of living space	❌ None	✅ Yes (approx. 7-10 cm/wall)
Aesthetics / Work	✅ Improved	❌ Unchanged
Timeliness and work	Longer	️ Faster
Price / m2	💰 More expensive	💸 Cheaper

👉 If you can intervene outside, IT IS ever more effective in the long term.

What are the real benefits of IT?

👉 On average, ISCED allows:

Reduce your heating bill from 30 to 40%
Improve summer comfort (by limiting overheating)
Remove thermal bridges (dall joints, angles, lintels)
Valorize the DPE of your property (and therefore its resale)

Need a diagnosis or an ITE quote?

FRC PACA accompanies you in all your outdoor insulation projects in the Alpes-Maritimes and Var.
✔ RGE Technicians
✔ Advice on aid
✔ Clean and sustainable work