Don Vandervort, Head Homeboy, has written more than 30 DIY home improvement books, been a segment host on HGTV, served as MSN.com's home improvement expert and written countless magazine articles.
Methods for tightening loose balusters in banisters usually involve inserting wedges or securing loose parts with screws. Use a syringe-type glue bottle to squeeze wood glue into the baluster sockets at top and bottom. If you're using screws, drill pilot holes for them to prevent the wood from splitting. Be sure to cover any visible screw holes with wood plugs.
If you're using nails, drill pilot holes sized for small (2d to 4d) finishing nails through the baluster ends and into the wood holding them in position. Use a nail set to bury the nails into the wood and then fill the nail holes with wood putty.
