The answer to 'flat roof sagging' is that a sagging flat roof is a common problem that can be caused by several factors, including improper installation, poor drainage, excessive weight, or structural damage. Symptoms of a sagging roof include visible dips or depressions in the roof surface, standing water, and cracks or splits in the roofing material.
In many cases, a sagging roof can be repaired, but the solution will depend on the underlying cause. Smaller sagging areas may be addressed with roof coatings or reinforcements, while more significant issues may require replacing the roof structure or supporting beams. It's important to address a sagging roof promptly to prevent further damage and potential leaks.