Sealing the Units to Roof

Many have asked if they can caulk the unit to the roof. This is entirely OK as long as its not a glue thats going to make the unit stick. Remember, these are designed for easy removal by plumbers or other home maintenance people. If they are glued on, they cannot access the vent to snake it out if plugged. So dont glue it down. A simple caulk should be fine if you so desire