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Once the cardboard shim is glued down and set, apply a generous bead of construction adhesive directly to the top surface of the shim where the laminate nosing will rest. Carefully place the laminate nosing onto the adhesive, ensuring it is cut tightly to fit the width of the stair tread. This tight cut is essential for a nice, consistent 'reveal' or overhang on both sides. Wiggle the nosing gently to ensure the adhesive spreads evenly and makes good contact. Finally, secure the nosing in place by driving three finish nails through it using a finish nailer. Place one nail in the center and one near each end for optimal hold.