How to Build Floating Deck Stairs

Mississauga Jul 01, 2026

Building a floating deck stairs can add a touch of elegance and modernism to your outdoor space. These stairs, which appear to float due to their lack of visible supports, can be a stunning addition to your deck, but they require careful planning and execution. In this guide, we'll walk you through the process of building floating deck stairs, from planning to completion.

a man is placing plants on some steps
a man is placing plants on some steps

Before you start, it's crucial to understand that floating stairs are not suitable for all deck designs. They work best with open risers and a modern aesthetic. Also, they require a strong, level foundation and careful consideration of safety features.

How To Build Floating Outdoor Steps
How To Build Floating Outdoor Steps

Planning Your Floating Deck Stairs

Your first step is to plan the layout of your stairs. Consider the height of your deck, the number of steps you'll need, and the rise and run of each step. The rise is the vertical distance between steps, while the run is the horizontal distance. Building codes typically require a rise of no more than 7.5 inches and a run of at least 10 inches.

How to Build a Deck
How to Build a Deck

You'll also need to decide on the material for your stairs. Pressure-treated lumber is a popular choice for outdoor applications, but you might also consider composite materials for their durability and low maintenance.

Designing the Stringers

DIY Floating Deck Tutorial | Easy Backyard Deck Build
DIY Floating Deck Tutorial | Easy Backyard Deck Build

The stringers are the structural components that support the treads of your stairs. For floating stairs, you'll need to design stringers that are open in the middle to create the illusion of floating treads. You can do this by cutting out the center of your stringers, leaving a solid outer edge.

To calculate the size of your stringers, you'll need to know the total rise of your stairs and the number of steps. The formula for the width of the stringer is (Total Rise) / (Number of Steps + 1). For example, if your total rise is 48 inches and you have 6 steps, your stringers would need to be 8 inches wide.

Choosing the Right Treads

How to Build an Elevated Deck Step-by-Step
How to Build an Elevated Deck Step-by-Step

Treads are the horizontal surfaces you walk on. For floating stairs, you'll want treads that are open in the center to match the design of your stringers. You can achieve this by using thin, narrow treads or by cutting out the center of wider treads.

Remember to choose treads that are slip-resistant, especially if your stairs will be exposed to the elements. You might also consider adding non-slip tape to the surface of your treads for added safety.

Building Your Floating Deck Stairs

DIY deck stairs
DIY deck stairs

Once you've planned and designed your stairs, it's time to start building. Begin by laying out your stringers on a flat surface. Use a jigsaw or circular saw to cut out the center of each stringer, following the design you've created.

Next, cut your treads to size. If you're using wide treads, you'll need to cut out the center to match the design of your stringers. If you're using thin treads, you can simply cut them to the width of your stringers.

Building Box Steps and Stairs for Decks
Building Box Steps and Stairs for Decks
Super strong Step Stringer Attachment
Super strong Step Stringer Attachment
a wooden deck in front of a white house with green grass and blue sky behind it
a wooden deck in front of a white house with green grass and blue sky behind it
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How To Frame & Build A Floating Deck.
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The Easiest DIY Deck Stairs You Could Make
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how to build a fabulous floating deck
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WOODWORKING IDEAS | How To Build a Small Deck with Custom Features | Facebook
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Building Box-Style Stairs
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Fix Your Deck Access With These Simple DIY Stairs
Deck Bracket
Deck Bracket
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two children on a wooden deck with text overlay how to build a floating deck in a day
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How To Build Floating Outdoor Steps
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a man standing on top of a wooden platform in front of a house under construction
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DIY Deck Stairs That Look Amazing!
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the steps are made from plywood and have glass shelves on each side for storage
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How to Build a Deck Like a Pro
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Building a Box Step for the deck
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Easy Stairs
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Building a Box Step for the deck
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12+ Creative Floating Deck Step Ideas

Attaching the Treads

To attach the treads to the stringers, you'll need to use screws or bolts. Start at the top of your stairs and work your way down. Align the tread with the top of the stringer and attach it using your chosen hardware. Make sure the tread is level and securely attached to the stringer.

Repeat this process for each tread, working your way down the stairs. Once all the treads are attached, you can add any finishing touches, such as handrails or lighting.

Adding Safety Features

While floating stairs can be stunning, they can also be dangerous if not designed properly. To ensure the safety of your stairs, consider adding a glass or metal barrier between the treads. This will prevent small children or pets from falling through the open risers.

You might also consider adding a handrail to your stairs. This can provide stability and make your stairs more comfortable to use. Make sure any handrail you install is securely attached and meets local building codes.

Building floating deck stairs can be a challenging but rewarding project. With careful planning and execution, you can create a stunning addition to your outdoor space. Don't forget to test your stairs thoroughly before using them to ensure they're safe and stable. Happy building!