What is a common indicator of a leaking roof?

Water stains on interior walls or ceilings serve as a common indicator of a leaking roof because they result from moisture penetrating the roofing material and entering the living space. When water leaks through the roof, it can lead to discoloration and the formation of stains on the surfaces beneath, signaling that there is an issue that needs to be addressed. These stains often appear as brown or yellow spots and can range in size, depending on the severity and duration of the leak.

Identifying such stains is crucial for homeowners and inspectors alike, as they can provide early warnings of potential damage, such as mold growth or structural weaknesses, which may arise from prolonged exposure to moisture. Monitoring and addressing these water stains promptly can help prevent more extensive and costly repairs in the future.