Litespeed Construction repairs roof vents all the time. Sometimes we can repair, but in many instances we have to replace them. This particular vent is an exhaust vent and might be at the end of its life due to it being smashed. When a vent has been smashed like this one cracks and holes can allow water to enter the area around it because it is made of sheet metal. Complete replacement is the best option for damaged aluminum exhaust vents that are damaged to this extent. In the case of this individual’s property the damaged area had been caulked in the past. However, the leak came back due to the inefficiency of caulking these sorts of damages. As a result full replacement is the best option.