It sounds like you're referring to — a common term in the glazing and construction industry. Here’s a concise breakdown:
Stress cracks are rarely random; they are usually the result of one of the following factors: 1. Thermal Stress (Temperature Fluctuations) window stress crack
A stress crack is essentially a failure of equilibrium. It is the window telling you that the forces acting upon it—temperature, pressure, or structural load—exceeded the safety margin of the material. It turns a transparent barrier into a ledger of thermal and physical forces. It sounds like you're referring to — a
The most intriguing aspect of a stress crack is what you don't see. Unlike a baseball-impacted window, a stress crack has no spiderweb center, no chip, and no point of impact. It is the window telling you that the
A stress crack is a that appears in glass (usually insulated glass units or tempered glass) without visible impact damage. It often starts at the edge and runs inward.
You can distinguish a stress crack from other damage by looking for specific visual markers: