Depending on the type of stairway, stair treads can be made from wood, metal, or plastic.They can be made out of non-slip materials for indoor stairways, or thermally modified in order to withstand the elements outdoors.Our thick stair treads are built by cutting, planing, and gluing pieces of hardwood together. Crafted from high-quality hardwood, our thick treads have unique wood grain and are capable of withstanding a lifetime of wear. They can be ordered in a variety of stunning finishes.