The term 'dado rail' refers to a type of decorative moulding that is placed horizontally along the lower part of a wall. This moulding can have a number of different names depending on the region or time period in which it was popular. For example, the dado rail is sometimes known as a chair rail in the United States, as it was traditionally used to protect walls from being damaged by chair backs. In England, it is often referred to as a wainscot rail, as it was frequently used in the construction of wainscoting. Other names for this decorative moulding include battens, baseboards, and skirting boards.