The answer to 'underlayment missing shingles' is that missing or damaged roof underlayment is a common cause of missing shingles. Underlayment is the layer of waterproof material installed beneath the shingles, and it plays a critical role in protecting your roof from leaks and water damage. If the underlayment is missing or has deteriorated, the shingles may become loose or fall off entirely.
Some common signs of missing or damaged underlayment include curling, cracked, or missing shingles, as well as visible leaks or water stains on the ceiling or walls. In some cases, the underlayment may have been improperly installed or may have reached the end of its lifespan, typically around 20-30 years. Addressing the underlayment issue is essential to prevent further damage and ensure the long-term integrity of your roof.