Created at the initiative of the CSTB and stakeholders of the construction industry – including technical inspectors – the ATEx is a quick technical assessment procedure carried out by a group of experts on any innovative product, system or equipment. This assessment is often used either prior to a Technical Appraisal, because it provides preliminary feedback on the implementation of the systems, or for a single project. Examples of ATEx: lightweight facades, skylights, underfloor heating and cooling systems, roofing membranes, reinforcement of structures, and more.

Because project managers and insurance companies may lack some of the information they need to appreciate the risks incurred, and technical inspectors may hesitate to support clients in the adventure of experimenting with or developing an innovation, the Technical Experimentation Assessment (ATEx) is available for innovators to help them promote new products and systems. Manufacturers and designers, needing an informed opinion on the techniques they create, are increasingly relying on this procedure which facilitates the execution of first projects under optimal conditions. The ATEx is thus a sort of a “gateway” to the Technical Appraisal.

About one hundred ATEx are issued every year; most often they are requested by a company working on a specific construction project. Since 1982, 2,250 ATEx have been issued.

For each ATEx, a special Committee of Experts is gathered according to the needs of each system.

By assessing the first uses of an innovative system, the ATEx:

  • facilitates the integration of experimentation into construction;
  • helps identify risks and their prevention, while enabling insurance companies to make informed and appropriate decisions about coverage;
  • encourages clients to opt for experimentation;
  • helps manufacturers take advantage of simplified regulations.

ATEx on the web

See all Type “a” ATEx here: “Find an ATEx”.

Type “a” ATEx are issued on the basis of information provided by the applicant, concerning:

  • the characteristics of the innovation to be tested and its area of application;
  • the type and scope of the experimentation considered necessary, either for its development or to compile enough references prior to filing a Technical Appraisal application.

At the request of the ATEx holder, Type “b” ATEx are also posted on the website: “Find an ATEx”.

Contact the expert by product family

3-dimensional structures, foundation structures and infrastructure Loïc PAYET
Combustion, ventilation and air systems using air as an energy carrier Cédric NORMAND
External thermal insulation composite system with rendering and related products Christine GILLIOT
Floor coverings and related products Gilbert FAU
Flooring and flooring accessories Étienne PRAT
Lightweight facades and sandwich panels Aurélie BAREILLE

Masonry Philippe LEBLOND
Partition walls, liners and ceilings Marion LOPEZ
Photovoltaics Coralie NGUYEN

Piping for plumbing and air conditioning Philippe PIED
Processes for installation of coverings Christine GILLIOT
Roofing Marc AUGEAI
Silver economy Coralie NGUYEN
Solar thermal energy and energy recovery using water as an energy carrier Coralie NGUYEN

Special insulation products and systems Salem FARKH
Systems and purification Abdel Kader LAKEL
Translucent built-up cladding, cladding products and veture (insulating wall panel) Aziz DIB

Water treatment Thibaud ROUSSELLE

Waterproofing system for flat roofs, underground walls and casing Sarah ZEHAR
Windows and Glazing Hubert LAGIER