Transforming urban buildings into clean energy plants is a bold and powerful strategy to combat the climate crisis, reduce dependence on centralized grids, and promote more resilient, sustainable cities. Since 2010, cities have been responsible for over 75% of global electricity use, a demand historically met by fossil fuels as urbanization has increased since the Industrial Revolution. By the late 19th century, hydroelectric power began gaining relevance as a renewable alternative. However, with rapid advancements in solar technology, urban buildings now have the unprecedented potential to become self-sufficient power hubs.
Solar energy, in particular, has emerged as the most accessible and scalable solution, with photovoltaic panels becoming more efficient, affordable, and better integrated into architectural design. In many European cities, policies actively promote the installation of solar panels on new constructions, turning rooftops into decentralized energy sources. Cities like Copenhagen are leading the way, combining solar roofs with energy storage solutions to achieve carbon neutrality.
That is why large-scale complexes are becoming key players in the transition to a more sustainable future—and not by chance. With vast, often underutilized roof spaces, these structures offer immense potential for solar energy generation. Holcim, through its Elevate brand of roofing systems, highlights this opportunity as a strategic solution to maximize energy efficiency and reduce carbon footprints. Solar roofs play a critical role in environmental sustainability by reducing dependence on fossil fuels, thereby lowering carbon emissions and supporting global decarbonization efforts. On-site energy generation increases energy independence and security, mitigating exposure to volatile energy markets. Moreover, as corporations and real estate developers increasingly integrate ESG (Environmental, Social and Governance) principles into their strategies, solar roofs provide a tangible and effective way to fulfill sustainability commitments.
What Should Be Considered When Installing a PV System on a Large Flat Roof?
When installing a photovoltaic (PV) system, it is crucial to design or retrofit a roof that can support the solar panels throughout their expected lifespan, typically at least 20 years. Other important factors include increased foot traffic during installation and maintenance, as well as the additional weight of mounting racks and the solar panels themselves. Choosing the right roofing system components, such as the waterproofing membrane and insulation layer, is essential to ensure a durable and high performance solution. To meet these needs, Elevate offers two roofing membranes that are perfectly compatible with photovoltaic systems: TPO (Thermoplastic Polyolefin) and EPDM (Ethylene Propylene Diene Monomer), both known for their durability, flexibility, and weather resistance. Additionally, Elevate provides comprehensive insulation and vapor barrier solutions to enhance energy efficiency and prevent structural damage. The company also supports green roofing systems that promote biodiversity and solar-ready roofing solutions designed for seamless photovoltaic panel integration.
More than just an eco-friendly initiative, solar roofing can also be a strategic investment that delivers long-term financial and operational benefits. Installing PV systems transforms underutilized spaces into productive energy sources, reducing electricity costs, generating revenue from surplus energy, and increasing property value. Additionally, government incentives, tax credits, and rebates make this solution even more viable. For large-scale complexes, solar roofs present an opportunity to optimize financial performance while contributing to a more sustainable and resilient environment, as illustrated in the following case studies:
Turning Logistics Hubs into Solar Powerhouses
With extensive, often underutilized rooftop surfaces, large-scale complexes have immense potential for solar energy generation, positioning themselves as key players in the transition to a more sustainable future. A notable example is the Nike European Logistics Campus, which adopted a solar roofing system to power its operations, reinforcing its commitment to sustainable practices. Similarly, the Barry Callebaut Global Distribution Center implemented a rooftop photovoltaic system that not only significantly reduced energy consumption but also fed excess electricity back into the local grid. These projects demonstrate how large logistics centers can transform underutilized spaces into strategic energy assets, aligning with a greener and more efficient economy.
Retail and Corporate Campuses: Unlocking Solar Potential
Shopping malls and corporate campuses are also recognizing the financial and environmental benefits of solar energy. One example is the Globus Hypermarket, a major retail center in Germany, which integrated a photovoltaic system with high-performance roofing materials from Elevate. Its 20,000 m² rooftop was maximized by combining natural lighting, solar energy generation, and a green roof to optimize biodiversity. Additionally, the use of Elevate's UltraPly TPO waterproofing membrane ensures high resistance to UV rays and ozone, meeting European durability and sustainability standards.
Powering Sport Facilities with the Sun
Sport facilities worldwide are adopting solar energy to cut high operating costs and strengthen environmental commitments. Installing photovoltaic panels on their roofs not only offsets energy consumption but also enhances the sustainable image of sports organizations. A notable example is the Marki Educational and Recreation Center (MCER) in Poland, which chose Elevate's UltraPly TPO roofing membrane as basis for a large solar roof. This solution now provides a significant portion of the energy used on-site, showcasing the potential of sports arenas in the transition to renewable energy sources.
While solar roofing offers significant benefits, its adoption has some challenges. High initial investment costs can discourage property owners despite long-term savings, while older buildings may require structural reinforcements to support the additional weight of PV panels. Additionally, regulatory complexities—including varying building codes and grid connection policies—can create implementation barriers. However, as technology advances and policies become more favorable, these challenges are gradually being mitigated. Looking ahead, innovations in solar energy are set to further enhance efficiency and integration.
