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Sturdy railings prevent deck mishaps -- and your local code probably requires them if your deck is elevated more than one step above the ground. To assure structural integrity, the railing posts must be securely attached to the stairs' stringers or, in the case of bottom railing posts, sunk in concrete.

WHAT YOU'LL NEED

MATERIALS
Treated 2x4 or 2x6 lumber
Sealer-preservative
Galvanized deck screws

STEPS 1-3 of 6

Mark the rail position on the posts and remove the damaged railing. Position the new rail against the inside of the stairway posts. Align the rail with the top rear corner of the top post, and with the mark on the lower post. Have a helper attach the rail temporarily with deck screws.

Mark the outline of the post and the deck rail on the back side of the stairway rail.

Use a level or combination square to mark a plumb line at the bottom end of the stairway rail, then remove the rail.

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