Install New Planks
Tap and slide the new planks into the tongue and groove openings using a soft mallet. Once in position, use a finish nail gun to fasten. Insert three or four nails at a 45-degree angle into the notch of the tongue. Keep nails about two inches inside the ends of each plank.
For the last plank, use a table saw to remove the tongue and bottom half of the groove. Carefully set the blade depth and fence width on your saw before making the cut. Removing this wood allows the last board to drop into place.
Before inserting the last plank, place a few dollops of construction adhesive directly onto the sub-floor. Do not use wood or carpenter’s glue because it won’t allow the wood to expand and contract. Adhesive creates a permanent seal, but still allows for natural movement of the wood.
Use a soft mallet to gently tap the plank into position. Once set, complete the installation by top nailing two inches from the end seam and one in the middle. If needed, fill any large gaps with wood filler and let dry.