Although zinc is renowned for its numerous benefits and impressive features, there are some things you need to consider when using this type of metal for your roof. For instance, experts claim that there are certain issues with corrosion from the underside portion of zinc roofing due to condensation of moisture. If your roofing system has a design that allows warm and moist air to travel upwards through the roof's insulation, sheathing and framing, water vapor may fall out of the air and remain trapped when warm air cools down.