Step 10: Shave the Lip off and Glue
At door jams, temporarily install the adjacent piece to easily see the shape of the next one. Then, use a tape measure to take measurements and cut the piece. For tricky areas like this, where new flooring will extend under the casing and jam, shave the lip off the tongue with a sharp chisel and add glue to secure the joint.
Use the manufacturer supplied beater block and a dead-blow hammer to nudge it into position. Then, continue with installation until the final row. It's necessary to shave the lip and add glue for strength.