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Isolants thermiques en rénovation

Par Sophie Trachte et Dorothée Stiermon

Editeur EPFL


Ouvrage très technique et très complet sur les différentes techniques et les différents matériaux disponibles en rénovation thermique des constructions. Cet ouvrage décrit avec précisions les caractéristiques des différents matériaux présents sur le marché (isolants organiques, isolants minéraux naturels ou synthétiques, isolants composites, isolants innovants) en les décrivant (avec de nombreuses photos à l’appui) précisant leurs caractéristiques techniques chiffrées, leurs modes d’élaboration, et en balayant un grand nombre de critère permettant d’avancer vers le meilleur choix correspondant au matériau recherché .

Dans un chapitre complet il détaille leur influence sur la qualité de l’air et sur la santé. Il aborde ensuite sur une quarantaine de pages le cycle de vie des différents matériaux et leur impact environnemental.

Il aborde la notion de l’économie circulaire dans la conception et la mise en œuvre de ces différents matériaux.


Nombreux tableaux, articles scientifiques et thèses sur le sujet.


En annexe figure une liste de fabricants et producteurs

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Riou glass rentre sur le marché espagnol


Aprés une série de rachats de miroiteries en France sur ces 15 dernières années, puis être rentré en Belgique ( Euroglass) et en Italie ( Cappelletti et Roleri ) en 2022, le groupe Riou glass s’attaque maintenant au marché espagnol en rachetant le catalan Vidresif situé à proximité de Géron. Vidresif est une importante miroiterie avec un CA de l’ordre de 25 millions d’Euros. Le groupe Riou transforme chaque année plus de 100 000 tonnes de verre plat dont il produit une grande partie sur son float de Salaise sur Sanne. Il réalisera sur 2023 un CA supérieur à 260 millions d’Euros avec 1300 salariés et 26 unités de production

Bavelloni at GlassBuild AMERICA 2023


Bavelloni is pleased to announce its participation in the show  GlassBuild AMERICA 2023, the largest event for the glass, window, and door sectors in North America. Taking place in Atlanta (GA), from October 31 to November 2, 2023, the event will feature Bavelloni America Inc. at booth 3631.


On this occasion, Bavelloni will showcase some of its glass edging machinery, including the VE 500 V10 SCS mitering machine. This straight-line edger, suitable for heavy glass, can process flat edge with arrises and chamfers ranging from 0° to 45°. Notably, the SCS version of this machine incorporates an innovative spindle control system (SCS) for enhanced automation. This system ensures automatic wheel positioning, resulting in high quality finishes, minimized production waste, and optimized tool utilization. The Bavelloni VB 350 CNS bevelling machine, known for its efficiency, reliability, reduced maintenance and long lifespan will also be presented. Moreover, visitors will experience live demonstrations of the Bavelloni REV 372 SR cutting table, a very compact, accurate and fast stand-alone bench for straight and shaped cutting of monolithic glass. Also on display, a wide selection of Bavelloni diamond and polishing tooling.


Bavelloni’s team of experts will be on hand at our stand throughout the event to welcome guests and provide comprehensive insights into Bavelloni's diverse product portfolio.


To gain complimentary access to the exhibition, enter Bavelloni Customer Guest Pass Code 23GBAEXH upon your online pre-registration.






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Affutage des forêts diamantés pour le verre plat

La partie active d’un forêt diamanté, celle qui va permettre de percer le verre est constituée de grains de diamant. Ces grains de diamant sont noyés dans un alliage métallique qui a pour objectif de libérer peu à peu le diamant en surface du forêt diamanté de façon à pouvoir percer le verre.

En perçant le verre la partie supérieure du diamant va se briser peu à peu.

Ce liant doit s’user à la même vitesse que le diamant. S’il s’use trop vite il y a trop de diamant en surface et le forêt va s’user très rapidement et il y a un risque que le perçage se fasse avec des écailles. S’il s’use moins vite que les particules de diamant il n’y aura pas assez de grains de diamant en surface et le forêt ne percera plus le verre correctement. Dans ce dernier cas il faut affuter le forêt de façon à user le liant et refaire apparaitre des grains de diamant en surface. On utilise pour cela des pierres synthétiques, généralement en oxyde d’aluminium.

Mais le besoin d’affutage des forêts devrait être rare, du moins pour les meilleurs forêts diamantés. En effet les fournisseurs qui sont dans ce cas utilisent des liants qui s’usent à la même vitesse que le diamant et donc sans besoin d’affutage.

L’affutage est un réel problème dans le cas des perceuses automatiques.


Logo flat glass used machines


Flat glass newsletter. December 2018



Sandblasting on glass




Sandblasting is a process of etching and etching obtained by projection of a jet of sand (corundum) very powerful (jet of compressed air) on a glass. The grains of sand create small cavities. This makes it possible to obtain a frosted or satin effect, to write and draw patterns on the glass and even to drill and carve it.


The process: (1870)

A violent jet of corundum sand is projected onto the surface of the glass with a compressed air gun. This projection of grains attacks the material giving a frosted appearance. The intensity of the frost varies with the duration of the application of the jet. The work is carried out in an airtight place to avoid inhalation of dust: either in a sandblasting booth where only the hands penetrate with gloves or automatically; either in a room (room) sanding for larger jobs where the user is protected by a combination.



The technique :

A stencil is cut manually according to the desired pattern. The parts of the glass that will not be sanded are called "reserves". For unit work, a sufficiently strong self-adhesive paper (adhesive film) is used. For series work, either a metal stencil (brass, zinc, copper) or a rubber stencil is used.

Factors that may vary the effects of sanding:

• Grain size

• Diameter of the nozzle

• Compressed air pressure

• Impact distance

• Jet orientation


Application :

The decoration by sanding allows to treat a wide range of materials such as glass, crystal, marble, copper, wood, jewelry, ceramics. The aesthetic effects produced by sanding are multiple:

• blurs or satin transparency

• modulation in the scattering of light

• creating a "soft" effect on the skin of the glass

• possibility of introducing extremely precise graphic elements (legends, logos, lines) on the surface of the glass.

• in the stained glass practice, artistic rendering is carried out with veneered glass by eliminating the colored veneer layer in order to reveal the basic glass with a clear colored tendency.



Merging in the field of aluminum and PVC joinery for windows and openings in France


The two groups Bouvet and FPEE, among the most important industrialists of the window market have decided to get closer


The two players who achieve a comparable turnover give birth to the number two market with a projected turnover of about 300 million euros, 1500 employees and a production of half a million carpentry .

For FPEE, this alliance also signifies the exit of minority financiers in its capital: entered during 2015, Siparex and Arkéa Capital Investissement said in a statement, December 3, that they "will give up their participation on the occasion of the merger of FPEE with the family business Bouvet ". Finalized in principle in January 2019, this "industrial merger" is still subject to the "agreement of the Competition Authority".




Glaston Corporation strengthens its position as a leading player in the glass processing technology market.

Strange and not to say surprising decision. Recall that a 2003, Glaston which was called at that time Tamglass had bought the Italian leader of flat glass forming machines Bavelloni and its distribution subsidiary Glasto. This buy-out, which was to build the undisputed leader in this market, ended ten years later with the resale of Bavelloni, which had grown from more than 600 employees to less than 200, with a sharp decline in value due to a lack of success. the merger of the two companies and after a cascade of leaders who will succeed at Glaston.

The resale of the grinding unit which, during the 2003 buyout, was a technological gem with a very strong profitability was made a few weeks ago.

Same with the purchase of Albat and Wirsam and its resale a few years later.


Glaston Corporation has signed an agreement to acquire the Bystronic glass Group. The globally operating high-end machinery, systems and services provider for the processing of flat glass is currently owned by Swiss industrial holding company Conzzeta AG.


Bystronic glass has a comprehensive range of products, highly complementary to Glaston’s, for the Architectural, Automotive and Display markets.


Bystronic glass has a strong brand recognition based on 50+ years of industry expertise and is a market leader with an unrivalled reputation for innovation and quality.


Technology frontrunner Glaston provides glass processing technologies and services for the architectural, solar, appliance and automotive industries globally. It is committed to serve clients with both the best know-how and the latest technologies in glass processing.


Through the combination Glaston will become a significant player in the glass machinery business providing a comprehensive product range offering from tempering, bending and laminating through insulating glass manufacturing and glass handling to automotive and display glass pre-processing as well as services. As a result of this transformational acquisition, Glaston will have a unique and value adding offering benefitting its customers.


Arto Metsänen, President & CEO of Glaston, comments: “I am very pleased to welcome Bystronic glass’s highly professional team to Glaston. We have followed the company for years and we are very impressed by the quality of its products and its transformation when it comes to both operational and financial performance. Together we will become a leading player in the glass processing technology market for the benefit of our customers. With our combined capabilities and expertise, we will be able to offer customers equipment, services and solutions from one supplier optimizing customer operations and driving customer value.”


Dr. Burghard Schneider, CEO of Bystronic glass, adds: “We are proud of our employees for delivering significant improvements over recent years. The transaction will open a new chapter to the benefit of all stakeholders. With an enhanced systems-thinking and strengthened R&D capabilities we will shape the industry trends towards energy efficient solutions and digital integration, jointly with our new colleagues from Glaston. Together we can serve our broad, global client base even better and we remain committed to deliver flat glass processing at its best in terms of productivity, quality and cost.”


The closing of the transaction is expected by the end of the first quarter 2019, subject to regulatory approval. Glaston has secured committed debt and equity financing, subject to customary conditions and support of an extraordinary general meeting, respectively. Until the closing of the transaction, Bystronic glass and Glaston will continue to operate as two independent companies and the legal structure will remain unchanged.








The sale on liquidation of the MIROITERIE DE LA JOLIETTE will be held on. Tuesday, January 22, 2019 at 11:15 am 13002 Marseille




Vandalism during demonstrations in France


During the demonstrations of yellow vests, acts of vandalism have multiplied in several large cities. Shop windows were broken, at a frequency never before seen by glazier professionals. So much so that everything can not be repaired quickly.

In the hours following the days of demonstrations the streets of the big cities were cleared of garbage cans and cars burned during the demonstrations. But the many broken windows still bear witness to the violence that has reigned. Glazing professionals speak of an unprecedented level: "It's chaos, we've never faced such damage." Usually when there are demonstrations, the procession moves from one place to another. point A to point B, and it is especially the shopkeepers at the end of the circuit who are subjected to acts of vandalism, where the damage is spread over many streets, "says Alexandre Costa, vice president of the union of glass installers flat (UDIVP) which brings together nearly 250 companies. "Last weekend, we had already had some requests, but it is really since Monday morning that we feel a certain panic.We had calls from merchants installed rue de la Boetie or on the boulevard Haussmann (Editor's note: in the 8th arrondissement of Paris) ", abounds the manager of BH Vitrier Paris.

For traders, the urgency is to secure their shops. Shop window installers are therefore asked first to install plywood sheets, a first step before handing new windows.

Turn to insurers

The UDIVP fears that in a rush, some traders will appeal to companies that improvise glazier. "The professionals are mobilized, but the demand is strong, they will first favor their usual customers.Some traders can then appeal to building companies or auto-entrepreneurs who do not necessarily have the skills or practice of tariffs too high, "warns the vice president of the UDIVP. Some rumors also run that the costs will be borne by the state, which may push merchants to accept any rates while they will never be reimbursed.

His advice: turn to his insurer, who will provide the approach to follow and give them the addresses of professionals who apply agreed rates that will be covered by their insurance. Because the replacement of a showcase represents a budget, especially for high-end glasses. "For shops on the Champs-Elysées or Avenue Montaigne, they are anti-reflection or burglar-proof glasses that are used, which can cost between 15,000 to 20,000 euros," said Alexandre Costa.

Some traders are waiting to see the rest of the movement

Faced with this unprecedented demand, it is not the supply of glass that will cause concern, but rather the availability of glaziers to carry out the projects. Some will call on temporary workers to replace them as soon as possible. But some traders had to wait and spend the holiday season with plywood plates as a showcase.

And then some traders play caution. "I have customers who do not want to proceed with the installation of the new window, they are waiting to see what is planned for the next weekend, so as not to have to replace it twice in a row" , testifies the manager of BH Vitrier Paris.





New Bavelloni option for automatic wheels adjustment

The wheels are perfectly positioned automatically: no manual adjustment is needed. The diamond spindles are motorized and the polishing wheel pressure is controlled by electronic proportional valves.

Optimal use and consumption of wheels, higher finish quality, less waste

This option is available for purchase with Bavelloni straight-line edgers VE 500 11 and mitering machines  V10 and V14.

Confirmed by science: France saves heating and cooling costs with the warm edge

New study can support window manufacturers when providing advice and

making sales

Kreuzlingen/Switzerland, November 2018. A scientific study now shows with concrete figures how much heating and cooling costs French home-owners and tenants can save with plastic spacer bars in the insulating glass in heat insulating windows. Three reference cities that represent the three different climates in France were chosen: Nancy for the cool-temperate climate, La Rochelle for the warm-temperate climate and Nice for the warm climate zone.

The new study of the independent Passive House Institute also calculates the savings of heating and cooling energy and CO2 emissions of entire buildings thanks to the small, efficient component. The results confirm the great benefits of high-quality plastic spacer bars compared with spacers made of aluminium. Window builders can use the study when advising customers and making sales.

According to the study, end customers can pay so much less in heating costs that a window with a warm edge is worthwhile, despite the slightly higher purchase price. For window builders and insulating glass manufacturers, this offers an economic opportunity, as high-quality plastic spacer bars are only slightly more expensive per linear metre to purchase than spacer bars made of aluminium.

The new study by the Passive House Institute was the first to investigate the influence of the spacer bars on the annual heating requirements of buildings: The study compares aluminium, stainless steel and plastic spacer bars in the windows of common houses that meet the requirements of the French energy standards in three different climate zones.  The results: If high-quality plastic spacer bars are used instead of aluminium spacer bars, in the cool-temperate climate in Nancy, 5.9 percent of the total heating energy can be saved in a standard French house with double glazing. With a conventional house with ever more commonly used triple glazing, as much as 7.9 percent can be saved, and in a building following the Passive House standard, the savings are nearly 18 percent.

In the warm-temperate climate zone in La Rochelle, in the case of a typical country house with double glazing, the savings are 4.2 percent, with 5.7 percent savings in a house with triple glazing and in the passive house, over 13 percent can be saved.

In the warm climate of Nice, in addition to the 49.6 kWh/(m²a) annual heating requirement with aluminium spacer bars, there is also a useful cooling requirement – energy needed for cooling provided by the air conditioning unit in summer – of 33.3 kWh/(m²a) at 20 °C maximum internal temperature.


The energy savings are lower in comparison to the climates where only heating is required, with savings of up to 3.8 percent by using the plastic spacer bar instead of the aluminium spacer, but a maximum of just under 9 percent in the passive house.




Small component, big impact


In modern heat insulating windows, after the glass and frame, the spacer bar is the third important component in terms of the energy performance. The spacer bar is now really becoming the centre of attention. If the spacer bar has a poor – i.e. high – heat transmission coefficient, a lot of heat is lost to the outside – even with an excellent frame and high-tech glass. Even with the plastic spacer bars, there are big differences in the performance values: A highly efficient warm edge, as used in the study, has a linear thermal conductivity of 0.14 W/(mK). The value for stainless steel is 0.6 and for the aluminium spacer bar – the clear back marker – it is a massive 160 W/(mK).

The fact that aluminium spacer bars are still being used is down to the price above all. Some insulating glass manufacturers process several millions of linear metres every year. The cents per metre saved in the purchase price of aluminium spacer bars are therefore the argument used in the purchasing decision and the price war. The new study can give the manufacturers some important backup here, as it proves the cash benefits available to customers and consumers by using the higher-quality insulating glass with the warm edge.


“Essentially, the aluminium should be banned. The positive effect on living quality that the warm edge in the insulating glass has is so great that it has to become the conventional system", said Prof. Wolfgang Feist from the Passive House Institute at the SWISSPACER "fenestra-vision" symposium in Strasbourg. Because alongside the energy savings and aesthetics, spacer bars made from plastic also offer more living comfort: the temperatures on the inside of the windows remain pleasant even in the winter. In addition, the warm edge prevents the build-up of condensation at the edge of the glass, reducing the risk of mould there.


The study was commissioned by SWISSPACER, one of the producers of warm edge spacer bars. “With the scientific investigation by an independent research institute, we wanted resilient data for the market," stressed Andreas Geith, Managing Director of SWISSPACER.





The energy transition tax credit for window changes in France


Good news for professionals in the window and for individuals! Minister of Ecological Transition François de Rugy announced that the government would reconsider the energy transition tax credit to take into account the changes of windows.


According to him, the government will continue to work for energy savings. It's "probably where we have the greatest margins of progress," he says. "A more efficient device than in the past". "We will reconsider the energy transition tax credit for window changes", this file "has been much debated for a year with building professionals." He was "on hold" when he arrived at the ministry. The minister promises "a more efficient device than in the past (...) an aid for those who pass window (s) in single glazed window (s) double glazing", stating that this aid will be capped at 100 euros per window