Cornerstone Building Brands Announces Partnership Integrating SunSteel™ Solar Panels With Its Double-Lok™ Metal Roofing Panels

Factory-integration combines solar panels and roofing systems, simplifying project delivery and reducing installation time

CARY, N.C.–(BUSINESS WIRE)–Cornerstone Building Brands, a leading manufacturer of exterior building products in North America, today announced a partnership to offer SunSteel solar panels factory-integrated with its Double-Lok standing seam metal roofing panels. This solution delivers a streamlined solar roofing solution for commercial and industrial buildings through its Star Building Systems^®, Ceco Building Systems, Metallic Building Systems, MBCI^® and Robertson Building Systems brands.

The Double-Lok with SunSteel integrated assembly arrives with SunSteel solar panels pre-applied to each Double-Lok roofing panel, combining clean energy generation with the longevity, low maintenance and sleek aesthetics of metal roofing. This single-trade approach is designed to simplify project delivery, reduce installation time and integrate array loading directly into the building design.

“Owners and builders want a cleaner, faster path to rooftop solar. By delivering solar that’s factory-integrated with proven Double-Lok standing seam panels, we’re helping customers unlock energy savings while preserving the durability and appearance they expect from metal roofing,” said Bryan Barton, regional manager at Cornerstone Building Brands.

Powered by a strategic collaboration with AUO Energy Business, a trusted innovator in solar solutions, this partnership enhances the performance and reliability of integrated solar roofing systems.

“We are honored that Cornerstone Building Brands has partnered with AUO’s SunSteel solution,” said TY Lin, vice president of AUO Energy Business. “Since its introduction in 2022, AUO has demonstrated our expertise in delivering factory-integrated systems that simplify solar installation on metal roofs. This confidence from our partners reinforces our SunSteel offering as a trusted choice for enabling efficient and sustainable roofing solutions.”

Integrated Solution Highlights

• Factory-assembled quality: Roof and solar components are factory-integrated for consistency
• Streamlined installation: One project, one crew; roof and solar installed together
• Structural alignment: Optimized solar array loading included in building design
• Low-profile look: Integrated, sleek appearance that blends into the roof
• Easier upkeep: Reduced parts count simplifies operations and maintenance

Solar Technology Snapshot

• Solar module construction: Bifacial monocrystalline half-cut cells with high-transparency glass and IP-68 junction box
• Integrated panel options: Multiple length configurations, each delivering 0.78 kW or 1.17 kW per integrated assembly (depending on length), with associated weight and electrical ratings provided
• Performance & durability: Designed for operating temperatures from -40°C to +70°C; front/rear test loads 3200/2400 Pa
• Solar panel certifications & warranty: 10-year product warranty; 20-year linear power output guarantee to at least 91.4% by year 20; certifications per IEC/EN 61215, IEC/EN 61730, UL 61730-1/-2

Availability

The Double-Lok with integrated SunSteel solar metal roofing system is available through select metal roofing brands from the Cornerstone Building Brands portfolio of trusted brands: Ceco Building Systems, Star Building Systems, Metallic Building Systems, MBCI and Robertson Building Systems. Project services, sales support and technical guidance are available to help builders and owners evaluate suitability, design considerations and installation planning. Visit sunsteelroof.com for more.

About Cornerstone Building Brands

Cornerstone Building Brands is a leading manufacturer of exterior building products for residential and low-rise non-residential buildings in North America. Headquartered in Cary, N.C., we serve residential and commercial customers across the new construction and Repair & Remodel (R&R) markets. Our market-leading portfolio of products spans vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems and metal accessories. Cornerstone Building Brands’ broad, multi-channel distribution platform and expansive national footprint includes more than 18,800 team members at manufacturing, distribution and office locations throughout North America. Corporate Governance & Responsibility are embedded in our culture. We are committed to contributing positively to the communities where we live, work and play. For more information, visit us at cornerstonebuildingbrands.com.

About AUO Energy Business

AUO, founded in 1996, is a global leader in display technology and solutions, with a strong presence across Asia, the U.S. and Europe, and a workforce of more than 41,000 employees. Building on its core expertise in optoelectronics — the foundation of solar technology — AUO established its Energy Business to drive sustainable innovation. Today, AUO Energy delivers comprehensive clean energy solutions, leveraging AUO’s technological strength and commitment to ESG. The business provides end-to-end services from development and design to construction and long-term operation, while pioneering smart energy integration for buildings and advancing digital transformation in energy management.

Notes/Disclaimers: SunSteel is a trademark of AUO Corporation. SunSteel solar panels are manufactured solely by AUO Corporation and are sold by Cornerstone Building Brands only as part of a panel system pre-installed on Double-Lok metal roofing panels. Cornerstone Building Brands makes no representations or warranties regarding solar panel performance and shall not be held liable for solar output or efficiency. All warranties, terms and conditions applicable to the integrated system, including coverage related to solar panels, are defined in the specific product warranty documentation.

Contacts

Media Relations Contact
Amy Hawkins, Brand & Content Marketing

amy.hawkins@cornerstone-bb.com