Step 5 · Mount the Sink Basin and Secure Pedestal
At the locations you marked on the wall for the sink basin, drill pilot holes into the wood blocking. The drill bit should be slightly smaller in diameter than the lag bolts that came with your sink. Move the pedestal into its final position, aligning it with the outline you traced on the floor. With your helper, lift the sink basin and carefully guide it onto the top of the pedestal, aligning the mounting holes with the pilot holes you drilled in the wall. Insert the lag bolts with their washers through the mounting holes. Use a socket wrench to tighten the bolts, alternating between them to apply even pressure. Tighten until the sink is snug against the wall but do not overtighten.