Glue, nails? How do I attach oak stair treads?

Q: I am going to install 1 1/16″ oak slab stair treads over top of existing stair treads. How do I attach oak stair treads? Glue, nails, or both? What kind of glue? What kind of nails? What does one use to cover up the nail heads?

A: I would use a polyurethane adhesive. You would still need several nails to hold the slab in place until the adhesive cures. Otherwise, the slab may tend to creep out of position.

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