The answer to 'underlayment curling shingles' is that curling or buckling of the roof underlayment is a common issue that can lead to shingle curling or damage. This is typically caused by improper installation, moisture issues, or poor quality underlayment materials. Symptoms include visible curling or wrinkling of the underlayment, and eventual shingle deformation or loss of seal. To fix this, the underlayment may need to be replaced, and proper ventilation and moisture control measures should be taken. In many cases, this is a job best left to professional roofers who can properly diagnose and address the root cause.
Underlayment curling can be a serious issue that requires prompt attention, as it can lead to leaks, water damage, and premature shingle failure if left unchecked. While some minor underlayment repairs may be possible for skilled DIYers, it's generally recommended to have a professional roofing contractor evaluate and address the problem to ensure a lasting solution.