How to Fix a Broken Stringer on the Stairs

Tools and Materials Needed:

- Measuring tape

- Pencil

- Utility knife

- Pry bar

- Hammer

- Wood chisels

- Circular saw or handsaw

- Drill and drill bits

- Wood glue

- Clamps

- Wood screws

- 2x6 or 2x8 lumber (for replacement stringer)

Step 1: Preparation

- Locate the Broken Stringer: Inspect the staircase to identify the stringer that is broken or damaged.

- Safety Precautions: Use proper safety gear such as gloves and eye protection. Make sure the staircase is stable and safe to work on.

Step 2: Measure and Cut the Replacement Stringer

- Take Measurements: Measure the dimensions of the broken stringer, including its length, width, and thickness.

- Cut the Replacement Stringer: Use a circular saw or handsaw to cut a new stringer using the measurements you took. Ensure that the ends are cut square and clean.

Step 3: Remove the Broken Stringer

- Pry Up the Broken Stringer: Use a pry bar to carefully pry up the broken stringer from the tread and riser where it is secured.

- Remove Nails or Screws: Use a hammer and chisel to remove any nails or screws that are holding the broken stringer in place.

Step 4: Clean and Prepare the Area

- Clean the Area: Remove any loose debris or nails left from the old stringer. Make sure the area where the broken stringer was is clean and ready to receive the new stringer.

- Check for Damage: Inspect the surrounding treads, risers, and support structures to ensure there is no additional damage.

Step 5: Attach the New Stringer

- Apply Wood Glue: Apply a generous amount of wood glue along the edges of the new stringer that will contact the treads and risers.

- Position the Stringer: Carefully position the new stringer in place, aligning it with the treads and risers.

- Secure the Stringer: Drill pilot holes and use wood screws to secure the new stringer to the treads and risers. Make sure the screws are long enough to penetrate through both the stringer and into the treads and risers.

- Add Additional Support: If the stringer runs the full length of the staircase, consider adding additional support in the middle using brackets or other support structures.

Step 6: Finish and Clean Up

- Check the Alignment: Ensure the new stringer is aligned correctly and that the treads and risers are level.

- Clean the Area: Remove excess wood glue and clean up any sawdust or debris from the work area.

- Allow to Dry: Give the wood glue time to dry and set completely before using the stairs.

Note:

If the broken stringer was part of a load-bearing wall or structural support, it's important to consult a professional contractor for a more comprehensive repair.

Remember to work carefully and take your time to ensure the safety and stability of the staircase.