What could spalling of a brick or concrete wall indicate?

Spalling of a brick or concrete wall is an important indicator that can provide insight into the conditions the material has faced. When surfaces like brick or concrete experience sustained high heat, the intense temperature can lead to the material expanding and contracting. If the heat is severe enough, it can cause the outer layer of the brick or concrete to crack and flake away – a process known as spalling. This damage reflects the history of thermal exposure, often associated with fire incidents or extreme thermal changes.

Understanding that spalling indicates the presence of heat is crucial for assessing building safety, as it highlights potential vulnerabilities in the structural integrity of walls subjected to high temperatures. This information can be vital during firefighting operations and post-event investigations to evaluate damage, assess risks, and plan for repairs or rebuilding.