Abstract: A window screen installation system is disclosed that includes a screen frame configured in a generally rectangular configuration from a plurality of screen frame extrusions. A plurality of trim molds are included that are configured to snap into place over the screen frame extrusion. When respective ends of the trim molds are positioned adjacent one another they form a plurality of generally rectangular shaped openings. A plurality of plinths are configured to be positioned in each of the plurality of openings configured to further secure the trim molds to the screen frame extrusions.