The answer to 'missing flashing' is that missing or improperly installed flashing is a common roofing problem that can lead to water leaks and other issues. Flashing is the thin metal or plastic material used to seal the joints and gaps around chimneys, vents, skylights, and other roof penetrations. When flashing is missing or damaged, it allows water to seep in and cause damage to the roof deck, interior walls, and other areas of the home.
Some common causes of missing flashing include improper installation, deterioration over time, or damage from weather or other external factors. Symptoms of missing flashing may include visible gaps or cracks around roof penetrations, water stains on ceilings or walls, and mold or mildew growth. To fix the problem, the missing flashing will need to be properly installed or replaced by a professional roofer. This is generally not a DIY job, as it requires specialized tools and knowledge to ensure the flashing is installed correctly and sealed properly.