Attach Decking (Treads and Risers)
From Deck Stairs · Step 6 of 8 · Video by decks.com

Showing 1:44–2:00 of the source video. Watch the full video with every moment.
What happens in this clip
The final step involves attaching the decking boards to create the treads and risers of the stairs. Typically, each tread will consist of two decking courses laid side-by-side, while each riser will utilize one decking course. When installing the treads, it is important to allow for a 1/2-inch to 1-inch 'tread nosing'—the portion of the tread that extends horizontally beyond the face of the riser board below it. Use a drill and appropriate exterior-grade deck screws to securely fasten all decking boards to the stringers.
Goal: Install all decking boards to form the stair treads and risers.
What's used
Tools
- Deck Screws
- Decking Boards
- Drill/Driver
- Measuring Tape Stanley
About the full video
This project provides a comprehensive, step-by-step guide to constructing and installing deck stairs. It covers initial measurements, calculating rise and run for stringers, cutting the stringers, two methods for attaching stringers to the deck frame, and finally, installing the decking boards for treads and risers.
Step 6 of 8: Install Treads
Place the first tread board onto the front of the stringers, ensuring it overhangs slightly at the front and sides as desired. Secure the tread to the stringers using deck screws, driving them through the tread and into the stringer support. Continue installing subsequent treads, ensuring they are level and evenly spaced, with a consistent overhang.
Every video in Deck Stairs
Step 1: Prepare the Stair Location
- 13:17–15:33 Prepare Stair Base and Pour Concrete Pad
- 5:20–6:48 Prepare Base and Install Stair Stringers
Step 2: Mark Stringer Placement
Step 3: Attach Stringers to Deck
- 1:08–1:44 Attach Stringers to Deck Frame
- 3:14–3:53 Attach Stringers and Secure Lower Posts
- 9:31–10:14 Install Stringer Hangers and Stringers
Step 4: Secure Stringers to Ground
- 10:09–11:12 Securing Stringers to Landing Pad with Base Plate
- 5:03–5:51 Secure Stringers to Foundation & Top Support
- 1:26–1:43 Anchor Stringer Base to Footing
Step 5: Cut and Attach Risers (Optional)
- 6:51–7:45 Install New Risers and Treads
- 3:00–3:09 Attach Treads and Risers
- 7:22–9:28 Install Stringers and Attach Risers/Treads
Step 6: Install Treads
- 11:12–11:54 Attaching Tread Boards
- 1:50–2:00 Install Stair Treads
- 1:44–2:00 Attach Decking (Treads and Risers) (this video)
Step 7: Install Railings
- 1:03–1:26 Install Railing and Balusters
- 13:45–15:23 Install Railings and Balusters
- 12:17–14:26 Install Railing Rails and Balusters
Step 8: Final Inspection and Finishing Touches
- 0:34–0:55 Complete Trim and Final Cleanup
- 5:07–5:29 Final Review and Clean-up
- 0:28–0:29 Final Review and Completion
Questions about Deck Stairs
What tools and materials are essential for building deck stairs using pre-cut stringers?
You will need basic tools like a measuring tape, level, drill with drill bits, shovel, and rake for site preparation. Key materials include pre-cut pressure-treated pine stair stringers, gravel and concrete mix for securing the base, appropriate exterior structural lag screws, and decking boards for the treads. The specific list provided includes items like Anvil digging shovel, OX marking pencil, Empire plumb bob, Quikrete gravel, SAKRETE concrete mix, SPAX lag screws, and Composite Decking Boards.
What are the most critical safety precautions I should take when building deck stairs?
Safety is paramount for structural projects like deck stairs. Always wear appropriate personal protective equipment, including safety glasses, gloves, and sturdy footwear. Ensure all connections are secure and stable, especially where stringers attach to the deck and ground. Always follow manufacturer's instructions for materials and power tools, and verify stability at each step.
How can I ensure my deck stairs comply with local building codes?
Compliance with local building codes is crucial for safety and legality. Before starting, consult your local building department for requirements on rise, run, width, handrails, and foundation for deck stairs. These codes vary by location and are designed to prevent structural failure and ensure safe use. Hiring a licensed professional can help navigate these complex requirements.
What common mistakes should a beginner avoid when installing pre-cut stair stringers?
A common mistake is improper site preparation, leading to unstable ground support. Ensure the ground is level, well-compacted, and has adequate drainage using gravel and pavers. Another error is not securely attaching the stringers to both the deck and the ground, which can compromise the entire structure's stability. Always double-check measurements and use a plumb bob and level for accurate placement.
What is the estimated time commitment and difficulty for this deck stair project?
This project is rated as 'beginner' difficulty with an estimated time of 3 days. However, factors like your experience level, site conditions, and adherence to local codes can extend this. Breaking the project into manageable steps and having all tools and materials ready will help keep it on schedule.
Are there alternative materials or methods for securing deck stair stringers to the ground?
While the project suggests gravel, concrete mix, and pavers, alternative methods for ground support include concrete footings or pre-cast concrete piers. The chosen method depends on local frost lines, soil conditions, and building codes. Always ensure the ground connection is robust and prevents settlement or shifting over time.
Deck Stairs
This project outlines the process of building deck stairs using pre-cut stringers. It covers site preparation, attaching the stringers to the deck, securing them to the ground, and installing treads and railings. Safety is paramount throughout the process, and it's recommended to consult local building codes and consider hiring a professional for complex steps.
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