05/20/2026
Your building envelope has a blind spot: the window opening.
Legacy framing systems deliver roughly 45% thermal efficiency at building openings. GreenGirt CMH XO has been tested to achieve 96.7% efficiency by aligning the window's thermal plane with continuous insulation, eliminating through-wall metal, through-insulation fasteners, conductive metal angles, and inefficient wood blocking. The result more than doubles effective R-value, meets ASHRAE 90.1-2022, and reduces energy waste, conserving resources and cutting embodied carbon emissions, all backed by a Declare label, an EPD, and Red-List free materials.
Stop accepting the performance gap your current spec ignores. Request a quote for GreenGirt CMH XO today: https://hubs.ly/Q04d_tBw0