What are common signs of wall collapse in a structure?

Sagging and blistering are clear indicators of potential wall collapse in a structure. These signs often suggest that the structural integrity of the walls is compromised due to issues such as moisture intrusion, excessive loading, or material degradation. When walls sag, they lose their vertical alignment, indicating that they may not be able to support the weight they were designed to hold. Blistering, which occurs when moisture gets trapped within the wall material, can also weaken the structure significantly. Recognizing these signs is crucial for firefighters and other professionals, as they can serve as warnings for imminent collapse, allowing for safer operational procedures.

Fresh paint is unrelated to structural integrity and does not indicate whether a wall is at risk of collapse. Cracks in the foundation might signal issues, but they are not as definitive in indicating that a wall is on the verge of failure. A strong odor of smoke, while concerning, is primarily indicative of fire rather than structural collapse. Observing sagging and blistering therefore provides the most relevant and immediate indication of potential danger regarding wall stability.