The answer to 'missing underlayment' is that missing or inadequate roof underlayment can lead to several problems, including water damage, mold growth, and reduced insulation. Underlayment is a critical component of a roof system that provides a waterproof barrier between the roof deck and the outer roofing material.
Common causes of missing underlayment include improper installation during roof replacement or new construction, damage from previous roof leaks, or the underlayment deteriorating over time. Symptoms may include visible water stains on the ceiling or walls, mold growth, and drafts or poor insulation. The solution is to have a professional roofer inspect the roof and install the appropriate underlayment as needed.