The rapid growth of photovoltaics in the building industry raises new technical questions on construction sites, particularly when it comes to integrating solar systems onto flat roofs. In these configurations, the interface between photovoltaic systems and waterproofing membranes is a critical issue, both for the durability of the structures and for the allocation of responsibilities among the various trades.
To address these challenges, a new professional certification has just been created: the Qualibat 3293 certification «Flat Roofs with Integrated Photovoltaic Module Systems», developed with input from the French Waterproofing Trade Association (CSFE).
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A qualification eagerly awaited by the profession
This development was expected by the industry. For several years now, the growing popularity of photovoltaic systems on buildings has led waterproofing companies to work more and more frequently on projects that combine Energy production and building envelope management.
A survey conducted by the CSFE among its members had, in fact, highlighted this need to structure the market, with several dozen responses in favor of creating a dedicated framework.
The goal now is to establish clearer guidelines for these practices and to officially recognize the role of roofers in the installation of photovoltaic systems on flat roofs.
Clarifying the Role of Waterproofing Contractors on Solar Power Projects
Qualification 3293 covers the supply and installation of systems for integrating photovoltaic modules into flat roofs. Specifically, it covers the installation of mounting structures used to secure solar panels to the waterproofing membrane, for example, using rails or brackets welded to the waterproofing system.
These operations require a high degree of precision in installation techniques to preserve the integrity of the waterproofing system while ensuring the stability of the photovoltaic system.
The creation of this certification is also intended to clarify the division of responsibilities on construction sites.
In this diagram, the waterproofing company works on the design and implementation of the rooftop integration system, while the supply and installation of photovoltaic modules, as well as the electrical connection, are handled by companies that specialize in solar installation.
A Technical Framework for Securing Facilities
In addition to recognizing the skills of roofers, the certification introduces a a more rigorous technical framework for the installation of photovoltaic systems on flat roofs.
In particular, the processes used must have recognized technical evaluations, such as the Technical Opinions (Atec), ATex or new technology assessments (ETN). Systems that rely solely on ballast, without a technical evaluation, are therefore excluded from the scope of the qualification.
This requirement is intended to ensure the reliability of the installations and to prevent risks associated with improper integration of equipment into the waterproofing system.
Specific requirements for applicant companies
Obtaining this certification is subject to several specific requirements. In particular, companies must demonstrate specific technical expertise, designate a representative with experience in flat roof waterproofing, and demonstrate their expertise through showcase projects.
These projects must demonstrate expertise in photovoltaic integration systems and their compatibility with existing waterproofing systems, particularly with regard to resistance to additional loads and the stability of the supports.
A development linked to the energy transition in the building sector
This new qualification is part of a broader movement to transform the construction industry. As rooftops become energy-generating surfaces, coordination among the various building trades is becoming a key issue.
The integration of photovoltaic systems into flat roofs perfectly illustrates this trend, which lies at the intersection of waterproofing, structural design, and energy production.
With the qualification Qualibat 3293, the industry now has a specific professional framework to support this development.
By recognizing the expertise of waterproofing companies in the integration of photovoltaic systems and clarifying responsibilities on construction sites, this new standard helps to secure projects and help shape a market that is poised for strong growth in the coming years.