Thermal Performance Is More Than Glass: Understanding Thermal Breaks

Insulating glass is an important part of an energy-conscious window, but it is not the entire story. Heat can also move through the frame, at connections between materials, through gaps in the seals, and around the installation perimeter.

What to Consider

Thermal breaks, insulated frame cavities, glass selection, seal continuity, and the connection to the wall must be considered together. The right priorities depend on climate, orientation, room use, opening size, and the project’s comfort goals.

IGNIS Guidance

Compare complete configurations instead of judging performance by glass thickness alone. Confirm the selected frame, thermal-break design, glass package, seals, and installation approach before production.