This article looks at ionoplast laminated glass in extreme cold, and at freeze-thaw durability against fogging, bubbles, and delamination. Ionoplast (SGP) is often specified for this duty because of its stiffness, adhesion, and low moisture uptake, but only when the laminate is properly de-aired, fully bonded, and detailed at the edge. The piece describes a controlled freeze-thaw check and the three failure modes that should be inspected after each cycle.