Exterior installations of a stair require that it be constructed using only durable material. Steel that has been “hot-dipped galvanized” is such a material. The process begins by “hot-dip galvanizing” all of the individual component surfaces—inside and out. When the stair is assembled, all the joints are coated which prevents them from rusting. Now you have an exterior stair that is easy to take care of for years to come. You can choose to leave the spiral stair in its natural light gray galvanized finish. If you prefer to have a specific color, the galvanized stair can be painted using the proper primer. The galvanizing greatly increases the life span of the paint and reduces the need to repaint the stair at a later date. So if you are looking for a cost- effective yet durable stair, Galvanized Steel might work for you.