VdS Loss Prevention has published the revised VdS 6023 guideline. The new version replaces the 2023 edition—and significantly tightens the requirements. Of particular note: Going forward, the guideline will no longer apply only to combustible roofs, but to all types of roofing.
What’s Changing Specifically
The new VdS 6023 marks a fundamental shift in how photovoltaic systems are handled on commercial properties. While the previous version was primarily regarded as a strict catalog of measures for combustible roofs, the new guideline now takes a significantly more comprehensive approach to risk assessment. Photovoltaic systems are still considered an additional source of hazard—but they do not automatically increase the building code requirements for the roof structure itself. Instead, the specific roof construction will be the decisive factor in the future. Particular focus is placed on constructions such as:
- Sheet metal – combustible insulation – sheet metal
- Trapezoidal sheet metal roofs
- Wooden roofs
- PV-green roof combinations
These roof types could lose their previous classification as “non-combustible.”
Impact on Insurability
In practice, the VdS guidelines are considered an important standard for the insurability of commercial real estate. It is expected that insurers will promptly incorporate the new requirements into their risk assessments. Above all, the requirement for arc detection is increasingly becoming the new market standard—particularly for systems installed on combustible roof structures.
Connection to VdS 3145
The new VdS 6023 supplements the previously revised VdS 3145. While VdS 3145 defines general requirements for fire resistance, VdS 6023 specifies the protective measures required for combustible roof structures.
Our Recommendation
For new construction, operators should, whenever possible, opt for:
- non-combustible roofs
- non-combustible insulation materials
provided that the installation of a photovoltaic system is planned.
In addition, the respective state building codes must be observed, as these may contain specific requirements for PV systems.
Specialized contractors should check existing projects for compliance at an early stage—especially in the case of more complex roof structures.
Contact with the insurer should be established as early as the conceptual phase so that additional requirements can be incorporated into the planning at an early stage. It is recommended to consult VdS-certified PV experts to review the plans and perform acceptance inspections prior to commissioning.
Do you have any questions? We’d be happy to assist you in evaluating existing or planned photovoltaic projects.
