How to install solar panels?
How to install solar panels on a sandwich panel roof?
Is it possible to install solar panels?
Yes, it is perfectly possible! Installing photovoltaic panels on an insulated sandwich panel roof is actually an excellent solution for combining thermal comfort with energy production. However, this operation requires following essential technical rules. Proper installation ensures the safety of the structure, the maintenance of watertightness, and the longevity of your system.
The 5 key steps to a successful installation
To ensure the longevity of your roof and your solar system, here are the unavoidable points to monitor during implementation.
1. Check the roof compatibility
Before any installation, it is essential to ensure that the building's framework is suitable:
- The load-bearing support: The purlins, whether wood or metal, must be correctly sized to support the additional weight of the solar equipment.
- The pitch: A minimum roof slope is necessary, both to ensure proper rainwater drainage and to optimize the capture efficiency of the photovoltaic panels.
2. Use an appropriate mounting system
Warning: solar panels should never be installed directly onto the top sheet of the sandwich panel! It is mandatory to use:
- Specific mounting systems supplied by photovoltaic manufacturers.
- Long structural screws designed to pass through the entire sandwich panel and be firmly anchored directly into the purlins.
This method allows for correct load distribution on the supporting structure and prevents any deformation or pulling away of the insulating panel.
3. Preserve the roof's watertightness
This is one of the most sensitive points of the project. Drilling the roof requires great precision: every attachment point must be treated with the utmost care.
- Mandatory use of EPDM gaskets or suitable sealing washers.
- Fasteners installed in strict compliance with the manufacturer's recommendations.
Poorly executed installation can lead to insidious water leaks in the medium or long term, severely degrading the insulation and the structure.
4. Install the rails and panels
Once the anchors are correctly secured to the framework purlins:
- Aluminum profile rails are attached to the roof supports.
- The solar panels are then positioned and firmly clamped onto these rails.
This elevation ensures a precise alignment of the installation and creates an air gap essential for ensuring good ventilation under the solar collectors, thus avoiding overheating.
5. Connection and final checks
The final step, which is highly technical, concerns the electrical commissioning:
- Electrical connection of the panels and the inverter.
- Securing the installation.
- Final structural checks: tightening of fasteners, inspection of watertightness, and general alignment.
Important reminder: These operations must be carried out by a qualified installer (RGE) to comply with current electrical standards and insurance requirements.
In summary
Insulated sandwich panels provide an excellent base for a photovoltaic installation. To make your project a success, three watchwords: use appropriate fasteners, attach directly to the framework purlins, and take great care in sealing every drill point. A well-designed installation will allow you to perfectly combine energy performance, thermal insulation, and the durability of your Isotuiles roof.
An upcoming Isotuiles roofing project?
Our tile-effect sandwich panels are perfectly compatible with solar projects when installed according to best practices.
