An apparatus (10) of the present invention is designed for assembling a load floor (12) having a peripheral slot (22) and an overlaying layer (24, 28). The apparatus (10) tucks the overhang of the overlaying layer (24, 28) into the peripheral slot (22). At least one holding device (52) holds the load floor (12). At least one tucking tool (54) tucks the overhang of the overlaying layer (24, 28) into the peripheral slot (22) to fold the overhang over the peripheral slot (22) and thereafter tucking the overhang into the peripheral slot (22). The invention includes a method of sequentially folding and thereafter tucking the overhang of the overlaying layers (24, 28) into the peripheral slot (22).