Dallas, Texas – (June 2, 2026)

Oldcastle BuildingEnvelope, Inc. (OBE), a leading supplier of architectural glass, metal, and hardware, announces Reliance™-TC SS (Thermal Control Screw Spline), a new high-thermal screw-spline curtain wall system built on OBE’s trusted Reliance curtain wall system and engineered to support the evolving performance needs of today’s building projects. Designed to meet increasing energy-efficiency requirements, Reliance-TC SS combines advanced thermal performance with fabrication efficiency and facade flexibility – supporting both design intent and project execution.
 

The Reliance-TC SS is engineered to meet the demanding code requirements in IECC Climate Zones 4-8, as well as evolving stretch codes. The system achieves U-factors as low as 0.19 using thin triple insulating glass units (IGUs) without increasing overall system depth, helping projects meet stringent energy standards without compromising design or installation efficiency.
 

Built on a screw-spline assembly, Reliance-TC SS helps streamline shop fabrication and support efficient field installation using familiar methods. The system supports multiple glazing configurations and accommodates both 1" IGUs and premium 1" thin triple IGUs, allowing performance to scale within the same system. In addition, OBE’s single-source offering of both glass and framing helps simplify coordination and improve compatibility from specification through installation.
 

“The Reliance-TC SS reflects how curtain wall projects are evolving,” said Julie Schessler, Product Manager, Oldcastle BuildingEnvelope. “It brings high-thermal performance and screw-spline efficiency together in one system - helping teams meet rising performance demands without adding unnecessary complexity.”

Key Reliance-TC SS features include:

• Sightline: 2-1/2”
• Overall system depths: 6” and 7-1/4”
• Accommodates 1” insulating glass and 1” thin triple IGUs
• Polyamide and aluminum pressure plate options
• Thermally broken utilizing 27mm and 30mm thermal struts and an EPDM isolator
• Inside-glazed and outside-glazed configurations
• Multiple glazing methods: dry, zone, and field glazed
• Screw spline assembly
• Twin span with splice sleeve
• Low-profile corner mullions
• Supports Red List Free goals

Oldcastle BuildingEnvelope, Inc.
Oldcastle BuildingEnvelope, Inc. (OBE) is North America’s leading vertically integrated manufacturer, fabricator, and distributor of architectural hardware, glass, and glazing systems. As a single-source provider of industry-defining brands, including CRL, the premier manufacturer of hardware and supplies, and Graham Architectural Products, a leader in high-performancewindow systems, OBE delivers a   portfolio of building solutions. Headquartered in Dallas, Texas, OBE operates a world-class network that supports architects, glaziers, and developers across every major market in the U.S., Canada, Europe and Australia. By combining the specialized expertise of its award-winning brands with massive international scale, OBE provides the technical excellence and integrated supply chain required for the most complex residential and commercial construction projects. For more information, visit www.obe.com.