A crop module builder including a module wrapping assembly configured to wrap a module with a wrap provided by a wrap roll. The crop module builder includes a floor including a plurality of belts configured to move the wrap from the wrap roll toward a front of the floor, wherein the floor includes a first position and a second position. A guiderod structure is operatively connected to the floor, wherein the guide rod structure is configured to move with movement of the floor. A mat is operatively connected to the floor and to the guide rod structure, wherein the mat spans a gap between the guide rod structure and the deck in the first position and in the second position.