The answer to 'metal roof curling shingles' is that curling or lifting of metal roofing shingles is a common issue that can have several causes. This problem can be caused by improper installation, weathering and aging, or even thermal expansion and contraction of the metal. Symptoms include visible curling or lifting at the edges or corners of the metal shingles.
In many cases, this issue can be resolved through simple DIY repairs, such as re-securing loose shingles with screws or sealants. However, if the problem is widespread or caused by more serious underlying issues, it's best to call in a professional roofing contractor to assess the situation and make the necessary repairs.