
how to measure an L-shaped staircase for carpet stair treads
About This Project
An L-shaped staircase, often called a quarter-turn, brings unique architectural charm to your home. But when it comes to adding the safety and style of carpet stair treads, its 90-degree turn can seem a little tricky to measure. Don't worry, we're here to empower your DIY journey! The secret to a perfect, custom fit for your Oak Valley Designs treads is to see your L-shaped staircase as three distinct areas: the first straight flight, the turning section, and the second straight flight. The way you approach the turn—whether it's a spacious landing or elegant winder steps—will guide your measuring strategy. For straight sections, you'll precisely measure each tread's width and depth. For a landing, it's one simple, larger measurement. For winder steps, each unique, tapered step gets its own careful attention. And here’s a pro tip for peace of mind: always measure from the *tread edge to tread edge*, never wall to wall. This ensures your custom treads fit beautifully, even if your walls aren't perfectly square, delivering the safety and elegance your family deserves.
Tools & Materials
Tape measure
Carpenter’s square
Level
Pencil
Masking tape
Tape measure
Generic tool suggested for this project.
Carpenter’s square
Generic tool suggested for this project.
Level
Generic tool suggested for this project.
Pencil
Generic tool suggested for this project.
Masking tape
Generic supply suggested for this project.
Steps
Uncover Your Staircase's Unique Turn: Landing or Winder Steps?
5 minutesTake a moment to closely look at the 90-degree turn that elegantly connects the two straight sections of your L-shaped staircase. Is it a generous, flat platform – what we call a landing – perfect for a moment's pause? Or does it feature a series of beautifully angled, wedge-shaped steps, known as winder steps, that guide you smoothly around the corner? This initial identification is absolutely key because it completely transforms how you'll approach measuring that corner. For a landing, you'll treat it as a single, separate rectangular piece, ready for a custom tread. For winder steps, each unique, tapered step will require its own individual measurement, ensuring a truly custom, safe, and stylish fit. This attention to detail is part of The Oak Valley Difference, ensuring your DIY stair remodel is a success.
Watch: Align Carpet Landing with TreadsPrecision Measuring Your Straight Stair Sections for a Flawless Fit
30 minutesWith your tape measure in hand, let's turn our attention to the straight sections of your staircase. For each and every tread in both flights, you'll want to meticulously capture its exact width and depth. Here's a crucial tip for a truly professional-looking result: always measure from the *outer edge of the tread to the outer edge of the tread*. Avoid measuring from wall to wall, especially near turns, as those walls are rarely perfectly square, and we want your custom treads to lay perfectly flat and secure. As you measure, give each tread a sequential number – this simple step will keep your project organized and make ordering a breeze. Don't forget to account for any existing trim or the stair nose overhang; these details ensure your carpet treads sit beautifully and protect your wood. For ultimate accuracy, a carpenter's square can be your best friend for those right-angled measurements, giving you peace of mind that your DIY stair remodel will be a stunning success.
Watch: Measure Stair Tread WidthConquering the Corner: Measuring Your Landing or Winder Steps
15 minutesThis is where your initial identification truly pays off! * **For a Landing:** If your turn features a welcoming landing, simply measure its full width and its full length. You'll treat this as one distinct, custom-sized piece, designed to seamlessly complement your straight stair treads. Remember, for optimal safety and aesthetics, your landing should ideally be at least 36 inches deep and as wide as your stair flights. This ensures a consistent, secure surface. * **For Winder Steps:** If your staircase gracefully navigates the turn with winder steps, each wedge-shaped step is a unique canvas! You'll need to measure each winder individually. For every winder tread, carefully measure its narrow inner edge, its wider outer edge, and its depth. This meticulous approach ensures that your custom Oak Valley Designs treads will perfectly hug each unique shape, providing unmatched safety, stability, and a truly bespoke look. This is how we ensure 'A better way to tread' for every angle of your home.
Watch: Measure and Customize Tape Outline

