From Deck Stairs · Step 6 of 8 · Video by decks.com

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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.
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.
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.
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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