In the AlpesMaritimes The Difficult Energy Diagnosis of Housing in Ski Resorts

According to a study by a company specializing in the renovation of buildings, the Côte d'Azur ski resorts have a catastrophic record in terms of DPE – the energy performance diagnosis The building stock of one of them would even have "90% thermal sieves".

A record in France which irritates at altitude "90% of energy sieves" in a resort in the Alpes-Maritimes.

The results of a study on energy performance diagnostics had a particular echo in the Riviera valleys A conclusion made in November 2022 which angers Isola 2000.

A blow of heat for the station which celebrated its 50th anniversary in December 2021 On the side of the town hall, Mylène Agnelli did not appreciate this conclusion either which stigmatizes the park ski resort real estate.

It has around 2,000 apartments and around fifty chalets 9 out of 10 homes would be thermal sieves.

Information widely relayed by the press for a few weeks, which would make it the worst pupil of the national housing stock 90% thermal colanders, really? At the end of November, the company Heero, which specializes in energy solutions for housing, revealed a study based on tens of thousands of pages of data.

It is based on the DPE energy performance diagnostics carried out in the context of real estate transactions: sales or long-term rentals This ranking is based on the two most negative DPE labels in the energy notification: F and G.

It is based on diagnostic data collected by Heero, between 2006 and July 2021 If the conclusion seems final, the methodology may raise a question.

The data studied relate to 500 ECDs carried out over 15 years, ie a little over thirty per year These diagnoses were actually carried out in two localities: in Isola, the village of a few hundred souls, and the Isola 2000 station which can accommodate up to 8000 people simultaneously.

ECD, kezako? The energy performance diagnosis was developed in 2006 and is imposed under the Alur law, for Access to renovated housing Very colorful and simplified, it makes it possible to categorize the energy consumption of a household, in primary energy, per square meter and per year.

Everything is expressed in kilowatt hours To establish it, the diagnosticians all follow the same procedure, and use certified tools and software.

DiagAzur is based in Mandelieu-la-Napoule Its manager, Lionel Boyer, is very familiar with Isola 2000, where he has assessed a number of apartments.

Only certified real estate diagnosticians can carry out such a process "In a DPE, we enter the description of the envelope - the exterior, the walls that overlook the circulation areas -, to this we remove the lossy surfaces - the windows or the entrance door -, and we come add heating, hot water mode, and ventilation.

And what's above and below " This cumulative data then formulates a score, and your DPE is established.

Problems with the DPE On July 1, 2021, the energy performance diagnosis is changing Taxed for any long-term rental or sale of goods, it is based on different criteria.

Since January 1, 2023, properties classified as "G" can no longer be rented long term in France Seasonal rentals are currently exempt from this new legislation, which will soon change.

The problem is that many diagnoses have been largely distorted in recent years "In July 2021, the new version of the DPE took into account all the previous errors that there were, this improved, let's say, the algorithm" begins Lionel Boyer.

It is indeed an approved software which combines all the data collected by the diagnosticians before aggregating them to produce a score, from A to G "Today, to put it simply, a diagnosis which has was done before July 2021 on Isola 2000, will be better with the new version".

What, for this experienced professional, to get a large number of apartments out of the "F" or "G" rating But above all, an absurdity was nestled in this method of calculation before the modifications made in the summer of 2021.

It concerns the altitude "Before, the algorithm assumed that every 100 meters, you have to heat up one degree more.

And one degree more, it's 8% additional electricity consumption " The goods of Isola 2000, strewn with as much altitude, were thus cheated by this method of calculation.

These are therefore levels of a few hundreds of meters which have since been taken into consideration to establish these diagnoses The impossibility of an "A" or a "B" It is therefore impossible to find properties classified A or B at this altitude.

"I have been working in real estate in Isola 2000 for 9 years, I have simply never seen any" confides the employee of an agency reputation of the station Even a new building like the one built at the entrance to Isola 2000 just 8 years ago is ranked lower on the DPE scale, she explains.

"It's impossible to have an "A" or a "B" at 2000 meters above sea level That would mean that homes don't lose heat in winter, that they don't need air conditioning in summer.

" abounds Laurent Rossi, diagnostician and real estate expert located next to Villars-sur-Var He repeats it, the exposure, the surface, the envelope or the framework of the property, and even adjacent dwellings play a crucial role.

Especially when he carries out an ECD of a property while the neighboring apartment is only heated for a few weeks in the year A problem with insulation In the 1960s and 1970s, large housing estates promised a better future.

They bloom everywhere in France By the sea, like at La Grande Motte, in the Parisian suburbs, but also on the Alpine peaks.

Shopping mall, centralized services and densification are on the program to support the growth of tourism and the investments of baby-boomers who have become adults All against a backdrop of the Glorious Thirties.

At that time, no energy standards existed Fossil fuels are widely used to heat buildings.

Far from any economic or environmental problem, the oil shock put an end to this strategy End of the Bretton Woods agreements, war in the Middle East The price of a barrel has multiplied by 4.

5 At Isola 2000, the buildings on the snow front have not been spared by these construction methods, which today are considered to belong to another era.

Jean-Michel Matas has owned an apartment in the Le Pignals residence for decades He uses it for a few weeks each year, and takes care of this 46 square meter property that he has absolutely no intention of selling.

This former real estate professional still sees several ways to improve this housing stock which he considers to be in good condition An example ? "In the 1970s, there was no double glazing.

When I took over this apartment, the first thing I did was put some on In my building, some apartments still have the original woodwork and even the curtains.

Now, there is even triple mountain glazing, with much better performance" judges the person who lives year-round on the Côte d'Azur coast It is through these openings that the hot air of an interior can especially escape.

“The building is an 80% concrete frame, with cladding We did work on the facade 10 years ago, installing insulating materials on the cladding, including rock wool.

Under the roofs, at the level of the attic, there may be work to be done, but I think that the biggest loss that there can be, I think, in the mountains, Christiane chose to live there year-round She has had work done in her apartment and rejects this designation of "energy sieve".

Above all, she sees it as a way of influencing the real estate market: "It also suits those who want to build at all costs, denigrate to death in the hope of eliminating this snow front which bothers some who want to invest, build" A strategy which aims, according to her, to destroy nature "shamelessly to build, provide opportunities for friends, raise the level of the resort that wants to become high-end [] The rich invest in the new and resell the old Bad idea because it's not the rich who buy especially here, where the prices are exorbitant, more than twice those of.