edge flow shear layer separation that preludes a vortex formation fig8 and 9 show examples of permissible variations for which larger openings 84 and 94 are utilized as a form of perforation and an alternative mounting base 98 is also illustrated in fig9 moreover as exemplified in fig1 perforation 107 as well as edge serration 109 on the horizontal upper face portion 105 are optional but preferable for these configurations which help reduce wind loads on the device itself and on the roof furthermore it is also allowable that the sawtooth like geometric elements on the serrated outer edge of the horizontal upper face portion bend uniformly or alternately at an angle from horizontal and or have various shapes and sizes along a span of the vortex suppressor fig1 exemplifies an embodiment of this invention being used with a traditional gutter 112 in this case the vortex suppressor 110 will also function as a drain through gravel stop or edge fascia fig1 illustrates further another embodiment of the invention which uses face perforation and edge serration on a generally horizontal upper face portion that is disposed slightly above the roof plane in this embodiment the horizontal face portion 125 provides the function of vortex suppression while the vertical portion 122 serves as gravel stop and edge fascia it is acceptable that the perforated upper face portion forms an angle with the roof plane it is also permissible that the sawtooth like geometric elements on the serrated outer edge of the upper face portion bend uniformly or alternately at an angle from the.