Which structural failure increases when repeated thermal expansion/contraction cycles affect lead seams in Gothic cathedral stained glass windows?

💡 Explanation

When temperature fluctuates, the lead undergoes thermal expansion/contraction causing fatigue because it expands and contracts at a different rate to the glass. Therefore, stress concentration increases leading to glass panel cracking results, rather than arch buckling, roof collapse, or wall tilting which are caused by different structural weaknesses.

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