We’ve officially kicked off the transformation of our foyer, stairway, and hallway—and it all started with something I’ve dreamed of for years: adding beautiful molding beneath the chair rail on the stairs. For the longest time, I let the angles intimidate me. Geometry wasn’t exactly my forte in high school, so tackling angled walls felt like opening Pandora’s box. But it turns out, it’s far less complicated than I imagined.
We decided on picture frame molding for this project. It’s one of the simplest ways to add architectural interest and classic character, especially fitting for our traditional-style home. We’ve used this molding in several rooms already, and it never disappoints. It’s timeless, elegant, and adds just the right amount of texture without overwhelming the space.
If this particular style isn’t quite your vibe, there are so many other molding options you can explore—like board and batten or traditional panel molding. You can easily adapt those to stairs as well.
After we wrap up a few more carpentry details in the space, we plan to paint the trim in a bold contrasting color to give the whole area an elevated look. But before we get to that step, I wanted to share the process with you while it’s still fresh in my mind. If you’ve ever wanted to try your hand at this kind of project, consider this your guide.
We gathered our tools—molding, saws, nailer, pencil, spacers, and one unexpected hero: a military protractor. That little tool turned out to be the secret to tackling those tricky stair angles with confidence.
The first step was installing the chair rail. Ours was already in place, but if you’re starting from scratch, you’ll want to measure up from the stair tread and mark your height. From there, use the angle of your baseboard as a guide and work your way up, following the same slope. Once the chair rail is measured and cut, attach it using a brad nailer, placing your nails at alternating angles to ensure a snug, flush fit.
Next, we mapped out our picture frame boxes beneath the chair rail. Using a simple 2×4 as a spacer and a level, we marked all our lines for where the molding would go. This step really helps with consistency, especially on sloped walls where visual balance is everything.
Then came the math—the part I dreaded most. But with a protractor in hand, even calculating obtuse and acute angles felt manageable. After measuring, we figured out the exact saw angles we needed for the cleanest cuts. To handle tricky angles, we even built a guide for the miter saw using simple triangle pieces and clamps. That hack made the difference between guessing and precision.
Once our cuts were made, it was time to start building the boxes. We attached each piece of molding using the brad nailer, again alternating nail angles to avoid warping or shifting. Then we filled any gaps with wood filler and sealed the edges with caulk.
After the filler dried, we gave it all a good sanding to smooth things out. The surface was ready for paint—though we haven’t picked the perfect shade yet. I’m imagining something moody and dramatic, a tone that contrasts just enough with the wall color to highlight the trim’s detail.
Even without paint, this small update makes such a difference. It adds quiet elegance and gives our stairwell a much more refined presence. One day I’d love to lay down a traditional runner on the stairs, but we’ll get there in time.
If you’re wondering about the details, here are a few things to keep in mind:
For trim paint, use something durable with a hard finish to resist dings and scuffs.
For wainscoting height, aim for about a third of your wall height, or just a bit lower than the existing paneling on your first floor.
And while wainscoting won’t necessarily add to your home’s monetary value, it absolutely enhances its charm and appeal—which can be a big win if you ever decide to sell.
If you’re looking for more ways to add character to your walls, we’ve tackled quite a few molding projects over the years. From beefing up crown and baseboards to layering wallpaper inside frame molding, it’s amazing what a little trim can do.
We’ll be sharing more updates as this stairway makeover continues. If you’ve ever stared down your staircase and thought about doing something similar, I hope this inspires you to give it a go. And don’t worry—if you’ve had your own share of geometry flashbacks, you’re definitely not alone.
Let me know if you give this a try or have questions along the way. I’d love to help you bring some charm to your own fifth wall.