Metal roof solar project withstood category 5 hurricane winds.

By Oliver Townsend Jun 3, 2024
Case study: How a metal roof solar project survived category 5 hurricane winds.jpegOrginal image from:

Case studies provide valuable insights into real-world scenarios where specific strategies or products have been put to the test. In this case study, we’ll explore how a metal roof solar project at Grupo Comercial Chedraui survived the devastating winds of a category 5 hurricane. The resilience of the solar installation in the face of extreme weather conditions offers important lessons for businesses and individuals looking to invest in sustainable energy solutions.

The Hurricane and the Devastation

Hurricane Otis made landfall near Acapulco with maximum sustained winds of 270 kilometers per hour, causing widespread destruction in the area. Despite the intense force of the storm, the metal roof solar project at Grupo Comercial Chedraui stood strong, showcasing the durability and reliability of the solar installation. While surrounding buildings suffered significant damage, the Chedraui store remained largely intact, highlighting the importance of robust construction and secure attachment methods in withstanding extreme weather events.

Metal Roofing in High Wind Conditions

Metal roofing, especially standing seam metal roofing, is recognized for its exceptional performance in high-wind conditions. The attachment methods and interlocking installation of metal roofs make them ideal for areas prone to strong winds. In the case of the Chedraui store, the metal roof solar project demonstrated the effectiveness of the clamp attachment system in securing the solar array to the roof, preventing damage to both the solar panels and the roof structure.

Enhancing Wind Uplift Resistance with Clamps

The installation of PVKIT solar mountings by S-5! along with MX Mini clamps played a crucial role in enhancing the wind uplift resistance of the metal roof during the hurricane. These external seam clamps not only secured the solar modules to the roof but also strengthened the roof seams, preventing failure modes like seam separation and clip disengagement. Third-party testing has shown that such clamps can significantly increase the uplift resistance of metal roofs, as demonstrated in the case of the Chedraui store.

Preserving Roof Integrity Through Secure Attachments

By transferring uplift forces from the solar modules to the roof panels and then to the building structure, the clamp attachments created a robust load path that prevented the roof from sustaining damage. The components and connections between the solar array and the roof remained intact, ensuring that the roof panels and roof clips could withstand the forces exerted by the hurricane. The successful outcome of this metal roof solar project underscores the importance of secure attachments in preserving the integrity of both the solar installation and the building structure.


The case study of the metal roof solar project at Grupo Comercial Chedraui serves as a testament to the resilience and durability of sustainable energy solutions in the face of natural disasters. By implementing robust attachment systems and secure mounting methods, businesses can protect their investments in solar installations and contribute to a more sustainable future. The lessons learned from this case study can inform future projects and help stakeholders make informed decisions about incorporating solar energy into their infrastructure.

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