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Window solutions for continuous insulation & building enclosures

Traditional window framing solutions often fail in energy efficiency; explore how our innovative structural window continuous insulation solutions can provide you with design flexibility to maximize energy efficiency.

Not sure where to begin? Start with our specifier’s guide to thermal window framing, which explains how window openings quietly undermine continuous insulation and what to specify instead.

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Window Solutions

Technical illustration of a window opening installed in a wall assembly with green GreenGirt XO at the header, jamb and sill, each with a labeled close-up detail circle

GreenGirt XO™

GreenGirt XO is a structural thermal framing system for windows and openings that combines structural composite metal hybrid sub-framing and compatible accessories with expert engineering support.

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System accessory "family photo" consisting of tape, angle trim, flat trim, and pressure seals in GreenGirt Green.

Accessories

These products are fully compatible with GreenGirt CMH, GreenGirt Steel, and SMARTci systems, ensuring seamless integration and performance.

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Wall Solutions

Discover the ideal wall solutions for your projects. Our advanced continuous insulation and building enclosure systems ensure superior efficiency and lasting performance.

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Roof Solutions

Revolutionize your rooftop with durable, energy-efficient systems designed to protect and perform, ensuring your building’s longevity and operational excellence.

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Oakland Community College, corner view of the low-rise building fully installed with GreenGirt Max CMH Z-girts with window openings cut in with GreenGirt XO installed

Classification of continuous insulation Z-girts

Continuous insulation Z-girts fall into three classes, ranked by how well they meet structural capacity, thermal efficiency, fire resistance, and long-term connection durability. Class determines which system suits a given project.

Compare the three Z-girt classes

Frequently Asked Questions (FAQs)

How does GreenGirt XO™ reduce thermal bridging at window openings?

GreenGirt XO™ is a structural thermal framing system that replaces legacy framing systems that invite thermal bridging with a continuous composite metal hybrid design, maintaining thermal continuity between the window and the surrounding wall assembly.

Yes. By aligning the window with the wall’s continuous insulation, GreenGirt XO™ meets the window-alignment requirements in section 5.5.5.4 of ASHRAE 90.1-2022, supporting as-built energy code compliance at window openings.