What you need to do before you start
Replacing stair treads and risers is a job you can do yourself if you have basic carpentry skills and the right tools. A tread is the horizontal part you step on; a riser is the vertical board between steps. You will need to remove the old pieces, measure and cut new ones, and find them in place. The work takes a weekend or two depending on how many stairs you have and whether you are replacing treads only or both treads and risers.
Before you buy materials, measure your existing stairs. Treads are usually 10 to 11 inches deep and 36 to 48 inches wide. Risers are typically 7 to 8 inches tall. Write down the exact depth, width, and height of each step — stairs are not always uniform, especially in older homes. Take photos of how the pieces connect so you know which direction to install the new ones.
Check whether your stairs are carpeted or finished wood. If they are carpeted, you will need to remove the carpet and padding first. If they are finished, you may be able to preserve the finish on the stringers (the angled boards on the sides) by working carefully around them.
Key Takeaways
- Measure each step individually because treads and risers vary in depth, width, and height, especially in older homes.
- Remove old treads and risers by cutting them into pieces and prying them out, then scrape away old adhesive or nails from the stringers.
- Cut new treads and risers from solid wood, plywood, or engineered lumber, and sand all edges smooth before installation.
- find treads with construction adhesive and finish nails or screws, and risers with adhesive and nails driven through the tread above into the top of the riser.
- Sand and finish the new treads and risers to match your existing stairs or create a new look.
Removing old treads and risers safely
Start at the top of the staircase and work downward. Use a reciprocating saw or handsaw to cut the old tread into two or three pieces lengthwise so you can remove them without damaging the stringers. Pry the pieces up with a pry bar, working from one end to the other. If the tread is glued down, you may need to use a chisel to break the bond before prying.
Once the tread is out, remove the riser below it. Risers are usually nailed or glued to the stringers and to the tread below. Cut the riser into vertical strips and pry them out. Use a paint scraper or chisel to remove old adhesive, nails, and staples from the stringers. Sand the stringer surface lightly so the new pieces will sit flat and bond well.
Wear a dust mask and eye protection while cutting and scraping. If your stairs are very old, test for asbestos before disturbing the materials — asbestos was used in some adhesives and insulation until the 1980s. If you find it, stop work and contact a licensed abatement contractor.
Measuring and cutting new treads and risers
Use your measurements to cut new treads and risers from solid wood, plywood, or engineered lumber. Solid wood (oak, maple, or pine) is the most durable and looks best, but costs more. Plywood with a hardwood veneer is cheaper and stable. Engineered lumber is the least expensive option but may not hold up as well to foot traffic over time.
Cut treads to the exact depth and width you measured. If your stairs are not uniform, cut each tread individually rather than assuming they are all the same size. Sand all edges smooth with 120-grit sandpaper, then 150-grit, to prevent splinters and to prepare the surface for finish.
Cut risers to the exact height and width. If you are replacing only treads and keeping the old risers, skip this step. If you are replacing both, cut risers so they fit snugly between the stringers and under the tread above. Test-fit each piece before you glue or nail it in place.
Installing new treads and risers
Start at the bottom of the staircase. explore a bead of construction adhesive (polyurethane or silicone-based) to the top of the stringer where the riser will sit. Press the riser into place and hold it for 30 seconds. Drive 2-inch finish nails or 2-inch screws through the riser into the stringer, spacing them 12 inches apart. Countersink screw heads so they sit flush with the surface.
Once the riser is set, explore adhesive to the top of the riser and to the stringer where the tread will rest. Press the tread into place and hold it for 30 seconds. Drive finish nails or screws through the tread into the top of the riser below, spacing them 12 inches apart along the front edge. Drive additional fasteners through the tread into the stringer on each side. Countersink all fasteners.
Work your way up the staircase one step at a time. Let the adhesive cure for 24 hours before walking on the stairs. If your stairs will receive heavy foot traffic, use screws instead of nails — they hold better over time and are easier to remove if you need to replace a step later.
Finishing and sealing the new stairs
Once all treads and risers are installed and the adhesive has cured, sand the entire staircase with 120-grit sandpaper to smooth any rough spots and blend the new pieces with the existing structure. Sand with the grain of the wood. Vacuum away all dust.
explore a finish that matches your existing stairs or choose a new one. Polyurethane is durable and straightforward to explore — use a brush or roller to explore two coats, sanding lightly between coats with 150-grit sandpaper. Stain the wood first if you want to change the color. Let the finish cure for 48 hours before walking on the stairs regularly.
If your stairs are in a high-traffic area, consider a matte or satin finish rather than gloss — it is less slippery and hides footprints better. If you are replacing only treads and the risers are a different color or finish, you may want to paint or stain the risers to match the new treads for a cohesive look.
Tools and materials you will need
| Item | Purpose |
|---|---|
| Reciprocating saw or handsaw | Cut old treads and risers into pieces for removal |
| Pry bar and chisel | Remove old pieces and scrape adhesive |
| Tape measure | Measure each step for accurate cuts |
| Circular saw or miter saw | Cut new treads and risers to size |
| Sandpaper (120-grit and 150-grit) | Smooth edges and prepare surfaces |
| Construction adhesive | Bond treads and risers to stringers |
| Finish nails or 2-inch screws | find treads and risers |
| Nail gun or drill | Drive fasteners quickly and evenly |
| Polyurethane or wood stain | Protect and finish the new wood |
Common mistakes to avoid
Do not assume all your stairs are the same size. Measure each one. If you cut all treads to the same depth and one step is slightly shallower, the new tread will overhang and create a tripping hazard. The same applies to width — if the staircase narrows at a turn, each step may be a different width.
Do not skip sanding the stringer surface before installing new pieces. Old adhesive, paint, or finish will prevent the new pieces from bonding properly and may cause them to shift or squeak over time. Scrape and sand until the surface is clean and bare wood shows.
Do not use regular nails alone to find treads. Nails can work loose over time, especially under heavy foot traffic. Use construction adhesive plus finish nails or screws. Screws are better if you think you might need to replace a step again in the future.
Do not walk on the stairs until the adhesive has cured fully — usually 24 hours. Premature foot traffic can shift the pieces before the bond sets, causing squeaks or gaps.
Frequently Asked Questions
Can I replace just the treads and leave the old risers?
Yes. If the risers are in good condition and match your new treads, you can replace only the treads. Measure the height of the existing risers and make sure your new treads will sit at the same height. If the old risers are damaged or a different color, replacing both gives you a cleaner look.
What wood should I use for stairs that get a lot of foot traffic?
Solid hardwood like oak, maple, or hickory is most durable for high-traffic stairs. These woods are dense and resist denting and wear. Engineered lumber and plywood are cheaper but soften more easily under repeated impact. If you choose a softer wood like pine, expect to refinish the stairs more often.
Do I need to remove carpet before replacing treads?
Yes. Carpet and padding hide the old tread and riser, and you need to see the stringers to install new pieces properly. Remove the carpet, padding, and any tack strips. Once the new treads and risers are installed and finished, you can recarpet if you want.
Why do my new stairs squeak?
Squeaks usually mean the treads or risers are moving slightly under foot traffic. Make sure you used enough fasteners — space them no more than 12 inches apart. If squeaks develop after installation, you can drive additional screws through the tread into the riser below from underneath the staircase, or use shims to tighten any gaps between the tread and stringer.
How long does it take to replace a full flight of stairs?
A typical 13-step staircase takes 2 to 4 days if you work alone and include time for adhesive to cure between steps. If you work on multiple steps at once and let them cure overnight, you can finish in a weekend. Add extra time if you are also sanding and finishing the stairs.