Stair Skirt Board Installation — Trim Along the Wall Side
The carpet came off and there is a ragged line of drywall along the wall side of the stairs, or the old skirt is chewed up and painted twenty times. We fit a new one tight to every step.
A stair skirt board is the wide trim board along the wall side of a staircase, so the treads and risers die into it instead of into drywall. JMB Builders does stair skirt board installation across the Twin Cities metro: one-piece, scribed to every tread and riser on a finished stair, or notched on a stair being rebuilt, in paint-grade poplar or MDF, tied into the baseboard at both ends. Priced per project, quoted from photos.
- Priced per project
- Scribed to each tread and riser, no caulk gaps
- Paint-grade poplar or MDF, stain-grade on request
- Tied into the baseboard at both ends
- Licensed MN contractor BC809005
A skirt board does for a staircase what baseboard does for a room. Without it the ends of the treads and risers run into the drywall, the drywall gets kicked, and the joint is a line of caulk that cracks every winter. With it there is a clean board along the wall, the treads and risers land against it, and the baseboard upstairs and downstairs has something to connect to.
The hard part is the fit. On an existing stair the skirt goes in after the treads, so it has to be scribed: every tread nosing and every riser gets marked onto the board and cut, one step at a time, so the board sits down over the stair like a saw blade. Walls are not plumb and treads are not all the same, so it is slow, careful work. The reward is a joint with no caulk in it.
On a stair that is being rebuilt or getting new treads, the skirt goes in first and the treads and risers are cut to it. That is a notched skirt, and it is faster and cleaner because the fit happens at the tread ends instead of on the skirt. Either way it goes in paint-grade, poplar or MDF, or stain-grade to match the treads, and it meets the baseboard at the top and bottom with a mitered or eased joint.
What you supply
- Photos: the stair from the bottom showing the wall side, one tread meeting the wall, and the baseboard at the top and bottom
- Whether the treads are staying or being replaced, which decides scribed vs. notched
- Width and profile preference if you want it to match an existing skirt or the baseboard
- Painting is quoted as a separate line — or leave it primed and caulked and paint it yourself
What JMB supplies
- One-piece skirt board in paint-grade poplar or MDF, or stain-grade to match the treads
- Scribing to every tread and riser on an existing stair, or a notched skirt on a rebuild
- Removal of old skirt, carpet tack strip and staples along the wall side
- Joints to the baseboard at the top and bottom, mitered or returned
- Nail holes filled and the board sanded, joints caulked, primed if paint-grade
- Painting or staining when you want it done, quoted as its own line
- Photos of the finished stair in your job folder
How it is priced: per project
Quoted in writing from your photos within one business day. What moves the number:
- Number of treads on the run and whether it turns at a landing
- Scribed over existing treads vs. notched on a stair that is getting new treads
- One wall side or both, on a stair with walls on both sides
- Paint-grade poplar or MDF vs. stain-grade hardwood
- Drywall along the stair that is damaged and needs patching first
- Baseboard at the top and bottom that has to be cut and refit to meet the skirt
Send one photo from the bottom of the stairs and one close-up of a tread at the wall. Tell us if the treads are staying, and we can quote it.
How long it takes
A scribed skirt on a straight run of stairs: most of a day. A notched skirt going in ahead of new treads: half a day. Two wall sides or a landing: add a half day.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized quote within one business day. We only come out to measure first when the job needs a tape measure — no pressure, no games.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Situations and options
Scribed skirt over existing treads
The board is marked to every nosing and riser and cut to fit down over the finished stair. The most common request after carpet comes off a stair with hardwood under it.
Notched skirt on a rebuild
The skirt goes in first, notched to the stringer, and the new treads and risers are cut to it. Done together with a tread replacement or a carpet-to-wood conversion.
Both walls on an enclosed stair
A stair with walls on both sides gets a skirt on each, matched in width, with the baseboard at the top and bottom returned into both.
Stain-grade skirt
Oak or maple to match stained treads, with the joint to the treads left tight and unfilled, and a mitered return to the baseboard.
Stair Skirt Board Installation — Trim Along the Wall Side: questions, answered
What is a stair skirt board?
The wide, flat trim board that runs diagonally along the wall side of a staircase, above the treads. The treads and risers end against it instead of against the drywall. It protects the wall, gives the baseboard at the top and bottom something to connect to, and finishes the stair the way baseboard finishes a room. Also called a skirtboard or a stringer trim board.
Can you add a skirt board to existing stairs without removing the treads?
Yes. The board is scribed: each tread nosing and riser is marked onto it and cut, step by step, so the board fits down over the finished stair. It is slow work, because walls are never plumb and treads are never identical, but the result is a joint with no caulk in it. The alternative on a stair getting new treads is a notched skirt that goes in first.
Should the skirt board go in before or after the treads?
Before, when you can. A skirt that goes in first is notched to the stringer and the treads and risers are cut to meet it, which is faster and gives a tighter joint at the tread ends. After is the only option on a finished stair, and then the skirt is scribed to the treads. We do both; which one depends on whether the treads are staying.
What material is a stair skirt board?
Paint-grade poplar or MDF on a painted stair, which is most of them. MDF is flat, stable and paints smooth; poplar takes the kicks a little better. On a stair with stained treads, the skirt is oak or maple to match, or it is painted to match the risers, which is a common look. Painting is quoted as a separate line — or leave it primed and caulked and paint it yourself.
How does the skirt board meet the baseboard?
At the bottom of the stair the skirt runs past the last riser and the baseboard on the floor meets it with a miter or a small return block. At the top it does the same into the hall baseboard. Where the baseboard is taller or shorter than the skirt, the joint is worked out with a transition block so it does not look like an afterthought. If the existing baseboard has to be cut back to fit, we do that as part of the job.
Do you fix the drywall along the stairs before installing the skirt?
If it needs it. Carpet tack strip and years of feet leave the drywall along a stair chewed up. The skirt covers a band of it, but anything above the skirt line gets patched so the wall is flat where the board meets it. Bad drywall behind the skirt itself is fine to leave; the board covers it and is fastened into the stringer and the studs.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
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Read morePage reviewed September 24, 2026 · JMB Builders LLC, MN license BC809005 · All stairs pages
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