a new system and as a retro fit system certain embodiments of the screen 12 include the front portion 40 that may incorporate an angle which promotes debris blowing off the screen 12 in addition the front portion 40 in some embodiments further may include apertures similar to or identical to apertures 20 to permit water that may reach the front of the screen 12 to drain off the surface of the screen 12 into the gutter 10 below the front portion 40 in some embodiments also incorporates a small vertical section 64 that acts as a positive stop to further prevent water from flowing off the front of the screen 12 the vertical section 64 on the front of the screen 12 may extend to approximately the height of the gutter 39 s front lip 14 thus the height of the vertical section 64 may depend on how recessed the screen 12 is in the trough of the 10 in addition the vertical section 64 may be farmed to mate with the front lip 14 of the gutter 10 so that the screen 12 can be installed by snapping the screen 12 into place the snapping action utilizes a compression force imposed between the sloped portion 42 and the front portion 40 the compression force secures the screen 12 in place in some embodiments and improves the efficiency of installing the screen 12 when screws or other fasteners are placed through pilot holes in the front portion 40 of the screen.