How to Repair a Bad Flooring Joint
Ask This Old House general contractor Tom Silva repairs a piece of wood nosing that was poorly installed and resulted in a bad joint
- Use a dull chisel to lift the nosing slightly to allow room for a reciprocating saw blade. Use the saw to cut the nails that hold the nosing and then remove the nosing.
- Pull the nails from the board, then scrape any old adhesive or filler off the nosing.
- Lay a straight edge on the widest gap on the flooring and then use a track saw or circular saw to cut all the flooring evenly.
- For the area where the saw blade can’t reach, chisel out the floor boards so they’re flush with the other boards.
- Check the fit of the nosing.
- Mark lines on the nosing and the floor boards for the location of mortises and cut them on both surfaces with a mortising machine.
- Use wood glue to install the floating tenons into the mortises of the nosing.
- Apply construction adhesive to the subfloor under the nosing and wood glue along the edge of the flooring.
- Bring the nosing in, line up the tenons with the mortises on the floor, and slowly tap the nosing in place with a hammer.
- Once the floor joint is tight, secure the nosing in place with 16d nails.