The answer to 'flat roof leaking' is that there are several common causes of flat roof leaks, including poor installation, deterioration of roofing materials, and pooling water. Symptoms may include visible water stains on the ceiling, mold growth, and dripping water. Solutions can range from simple DIY repairs to complete roof replacement, depending on the severity of the issue.
If the leak is minor and you feel comfortable working on the roof, you may be able to patch it yourself using roofing sealant or a roof patch kit. However, for more extensive damage or if you're unsure of the cause, it's best to call in a professional roofing contractor to diagnose and repair the problem.