What is an overlap stair nose? Exactly how it sounds! If you look at the diagram above you can see that the nose slides over the top of the flooring. Stair noses are not just for stairs, either. They are used for landings, sunken living rooms, and at the top of a staircase. These stair noses can be used with either our 3/8 inch tongue and groove floors or our 3/8 inch click lock floors. They are Carbonized just like the floors and we hand pick them to match your order.