The answer to 'why is my underlayment wind damage' is that the underlayment, the protective layer installed under the roof shingles, can become damaged due to high winds. This can happen for several reasons, including improper installation, age and weathering, or a lack of proper roof maintenance.
Common signs of wind-damaged underlayment include curling, peeling, or tearing of the material. This can lead to leaks, water intrusion, and further damage to the roof structure. It's important to address underlayment issues promptly to prevent more extensive and costly repairs down the line.