Staircase Wall Molding: Stepped vs Raked Frame Layouts
Staircase wall molding is laid out one of two ways: stepped frames, ordinary rectangles that climb the wall in steps, or raked frames, parallelograms whose top and bottom follow the slope of the stair. Stepped frames work with standard pre-cut kits; raked frames look more built in but need angle cuts sized to your stair's pitch.
Most stair molding guides jump straight to raked boxes and a miter saw. What they skip is the geometry that decides your weekend: on a typical 7 in rise and 11 in run stair, the acute corners of a raked frame need a saw setting of about 61 degrees, beyond the range of many miter saws. You already know a stair wall is the largest blank wall in most houses. This guide gives you the pitch of your stair from two measurements, the wedge-gap math for stepped frames, a ready miter table for raked frames, and the height to set the rail. For stepped layouts, our staircase wall molding starting point is a 1 to 5 panel picture frame kit. A pre-cut option is the Peel and Stick Wainscoting, 5 Vertical Picture Frame Molding, which installs with adhesive instead of nails.
Quick answer: Measure one riser and one tread to get your stair pitch, usually 32 to 38 degrees. Choose stepped rectangular frames 12 to 18 in (30 to 46 cm) wide for a no-cut install, or raked frames if you can cut angles. Run the rail 34 to 38 in (86 to 97 cm) above the nosings.
Key takeaways
- Stair pitch = arctan(rise / run): 32.5 degrees for a 7 / 11 in stair, 37.8 degrees at the US code maximum of 7 3/4 / 10 in.
- Stepped frames leave a wedge gap under each frame equal to frame width x rise / run: 11.5 in under an 18 in frame on a 7 / 11 stair.
- Raked frames need two different miters: about 61 and 29 degree saw settings on a 32.5 degree stair.
- Set the stair rail at handrail height, 34 to 38 in above the nosings in the US and 900 to 1000 mm in England.
- Pre-cut rectangular kits suit stepped layouts; raked layouts need cutting or a custom plan from our support team.
What is the pitch of your stair? Two measurements
Your stair's pitch, the angle of the molding line, comes from one riser height and one tread depth: pitch = arctan(rise / run). Most houses fall between 32 and 38 degrees. Measure on the stair itself rather than trusting a plan, because the molding has to run parallel to the real skirt board.
| Rise x run | Pitch | Rise per inch of run | Where you see it |
|---|---|---|---|
| 7 x 11 in (178 x 279 mm) | 32.5 degrees | 0.636 | Comfortable, common in newer homes |
| 7.5 x 10.5 in (191 x 267 mm) | 35.5 degrees | 0.714 | Common in older homes |
| 7.5 x 10 in (191 x 254 mm) | 36.9 degrees | 0.750 | Typical builder stair |
| 7.75 x 10 in (197 x 254 mm) | 37.8 degrees | 0.775 | Steepest allowed by the US residential code |
| 200 x 225 mm (7.9 x 8.9 in) | 41.6 degrees | 0.889 | Close to the 42 degree cap for private stairs in England |
The US limits come from the International Residential Code, section R311.7: risers up to 7 3/4 in and treads at least 10 in. In England, Approved Document K sets the 42 degree maximum for private stairs.
Stepped or raked frames: which staircase wall molding layout?
Pick stepped frames if you want to use standard rectangular kits with no angle cuts, and accept a triangular gap under each frame. Pick raked frames if you want every gap even and are comfortable cutting acute and obtuse miters. Raked looks like original millwork; stepped looks modern and is far quicker. If you want trim that sticks on rather than nails on, see the Wainscoting Wall Molding Kit, 3 Vertical Picture Frames.
| Stepped frames | Raked frames | |
|---|---|---|
| Shape | Rectangles, level tops | Parallelograms, sloped top and bottom |
| Cutting | None with a pre-cut kit | Two non-standard miters per frame |
| Spacing | Even sides, wedge gap below and above | Even on all four sides |
| Best width | Narrow, 12 to 18 in (30 to 46 cm) | Any width |
| Look | Modern, gallery-like | Traditional, built in |
| Kit | Standard picture frame kits | Custom plan or site cutting |
Worked example: stepped frames on a 7 / 11 stair
A stepped frame's bottom must clear the skirt board at its higher end, so a wedge-shaped gap opens up toward the lower end. The wedge height equals the frame width times rise / run. On a 7 / 11 in stair, a 12 in frame leaves a 7.6 in wedge, an 18 in frame 11.5 in, and a 24 in frame 15.3 in. Narrow frames keep the wedge small. The Modern Wall Molding Kit is a pre-cut, self-adhesive kit that can be painted to match the wall.
- Measure the run of wall along the stair. Example: 12 treads x 11 in = 132 in (335 cm) horizontal.
- Choose frames per tread group. One frame every two treads gives 6 frames, each owning 22 in (56 cm) of horizontal space.
- Frame width = 22 - 4 in gap = 18 in (45.7 cm).
- Step height between frames = 2 risers x 7 in = 14 in (35.6 cm). Each frame sits 14 in higher than the one before.
- Wedge under each frame = 18 x 7 / 11 = 11.5 in (29 cm) at the low end, shrinking to your chosen 4 in margin at the high end.
- Frame height: with a rail 36 in above the nosings, keep the frame top 4 in below the rail at its low end. The frames are all the same height, so one kit size repeats up the stair.
| Frame width | Wedge at 7 / 11 (32.5 degrees) | At 7.5 / 10.5 (35.5 degrees) | At 7.75 / 10 (37.8 degrees) |
|---|---|---|---|
| 12 in (30 cm) | 7.6 in | 8.6 in | 9.3 in |
| 18 in (46 cm) | 11.5 in | 12.9 in | 14.0 in |
| 24 in (61 cm) | 15.3 in | 17.1 in | 18.6 in |
Caveat: above about 24 in wide, stepped frames leave wedges so large that the frames look like they are floating. Use more, narrower frames, or switch to raked.
Raked frames: the miter angles for your stair
A raked frame has two acute corners and two obtuse corners. The acute corner angle is 90 minus the pitch; the obtuse one is 90 plus the pitch. Each piece is cut at half the corner, so the saw setting is 90 minus half the corner angle. On a 32.5 degree stair that is about 61.25 degrees for acute joints and 28.75 degrees for obtuse joints.
| Stair pitch | Acute corner | Saw setting, acute | Obtuse corner | Saw setting, obtuse |
|---|---|---|---|---|
| 30 degrees | 60 | 60.0 | 120 | 30.0 |
| 32.5 degrees | 57.5 | 61.25 | 122.5 | 28.75 |
| 35 degrees | 55 | 62.5 | 125 | 27.5 |
| 37.8 degrees | 52.2 | 63.9 | 127.8 | 26.1 |
Many miter saws stop well short of 60 degrees, so the acute cuts usually need a simple jig: a straight board screwed to the fence at an angle, so the saw cuts at a standard setting while the molding sits rotated. Test on scrap first. If you would rather not cut, send our support team a photo of the stair wall and the rise and run; we offer a free layout drawing and can tell you whether your raked layout can be cut to plan.
How high should molding go on a staircase wall?
Run any sloped rail at the same height as the handrail on the other side, measured straight up from the line of the stair nosings: 34 to 38 in (86 to 97 cm) in the US and 900 to 1000 mm in England. Matching the handrail makes the wall and the balustrade read as one design.
- Mark the nosing line by snapping a chalk line across the tread edges, or measure at the first and last step.
- Measure your chosen height straight up from that line at both ends and snap the rail line.
- Where the stair meets the landing, turn the rail level with a short transition piece at the same height above the landing floor.
- Keep frames 3 to 4 in (8 to 10 cm) below the rail and above the skirt board.
Pro tips
- Tape the entire layout with painter's tape and walk up and down the stair before buying. You see a stair wall from below, from above and moving, so it needs a longer test than a flat wall.
- Start the layout at the landing and work down. The landing frame is the one people stand in front of; the bottom frames are seen at an angle.
- Line frame edges up with tread groups, one frame per two or three treads, so the rhythm matches the steps.
- Use the thinner 1 in profile on stair walls under 3 ft wide; the wall is seen up close.
- Rent or borrow a tall step ladder with a stair leveler for the upper frames, or use a stair platform; never lean an ordinary ladder on the treads.
- Paint frames and wall the same color; the stair already has strong lines from the balusters.
Common mistakes with staircase molding
- Wide stepped frames. 30 in frames leave 19 in wedges and look adrift. Fix: 12 to 18 in frames or a raked layout.
- Measuring the rail from the wall corner, not the nosings. The rail ends up uneven with the handrail. Fix: measure vertically from the nosing line.
- Cutting raked miters at 45 degrees. The joints open. Fix: use the table above for your pitch.
- Ignoring the landing transition. A sloped rail that dies into a level wall looks unfinished. Fix: a level return at the same height above the landing.
Shop the look
- Half Wall Wainscoting Kit with 6 cm Chair Rail: 1 to 6 panels plus rail, from $39.41; good for the level wall at the foot or top of the stair.
- Dining Room Wainscoting, 3 Upper and 3 Bottom Nested Frames: $300 for a matching landing or hallway wall.
- Wall Molding Kit with Chair Rail: 3 upper and 3 bottom frames with a rail, from $165.
Frequently asked questions
How do you put molding on a staircase wall?
Snap a rail line parallel to the stair at handrail height, then install either stepped rectangular frames or raked parallelogram frames below it. Fill, caulk and paint as on any wall.
What angle do you cut molding for stairs?
It depends on your stair pitch. On a 32.5 degree stair, raked frames need about 61.25 degree settings for acute joints and 28.75 degrees for obtuse joints. Rail-to-level transitions are cut at half the pitch.
How high should a chair rail be on stairs?
Match the handrail: 34 to 38 in (86 to 97 cm) above the stair nosings in the US and 900 to 1000 mm in England, measured vertically.
Can you use picture frame molding kits on stairs?
Yes, as stepped frames. Rectangular pre-cut kits climb the wall in steps with no angle cuts. Keep frames narrow so the wedge gaps stay small.
Should stair wall molding be the same as the hallway?
Use the same profile and paint color so the stair and hallway connect, then let the layout change: raked or stepped on the stair, level frames in the hall.
For rail heights in other rooms, see our chair rail molding guide. Our Wainscoting Kits collection holds the frame and rail kits that suit stair halls and landings, or plan your wall with live pricing in our Wall Designer.
Last updated: October 7, 2026
