Stairs are the most common place in the home to have carpet, and yet they are also the trickiest. Choosing carpet for the stairs can be a bit more difficult than choosing carpet for other areas of the home. This is because, in addition to having to decide on carpet style and color, the carpet has to be of appropriate durability and thickness to be installed on the stair. Of course, it also has to look good as it wraps around the edge of the stair, and through the railing posts, if any.