The answer to 'flat roof sagging' is that a sagging flat roof is often caused by structural issues, such as inadequate roof support, water damage, or excessive weight from accumulated debris. Symptoms include visible sagging, pooling water, and cracks or separations in the roofing material. Solutions typically involve reinforcing the roof structure, repairing any water damage, and ensuring proper drainage.
In many cases, a sagging flat roof requires the expertise of a professional roofing contractor to diagnose and fix the underlying problem. DIY repairs are generally not recommended, as they can be dangerous and may not address the root cause of the issue. Attempting to fix a sagging roof without the proper skills and equipment can lead to further damage or even collapse.