The answer to 'why is my metal roof curling shingles' is that metal roofs can cause the shingles to curl for a few common reasons. Improper installation, extreme weather conditions, or poor ventilation in the attic can all lead to shingle curling on a metal roof. Symptoms include the shingles lifting up at the edges or in the center, creating gaps and exposing the roof deck. This can allow water leaks and damage over time.
To fix curling shingles on a metal roof, you may need to replace any damaged shingles, improve attic ventilation, or have the roof professionally re-installed if the issue is due to improper installation. Calling in a licensed roofing contractor is recommended, as working on a metal roof can be dangerous for DIY homeowners.