In architecture, a baseboard (also called skirting board, skirting, mopboard, floor molding, as well as base molding) is a (generally wooden) board covering the lowest part of an interior wall. Its purpose is to cover the joint between the wall surface and the floor.
Plastic baseboard comes in various plastic compounds, the most common of which is UPVC. It is usually available in white or a flexible version in several colors and is usually glued to the wall. 
Wooden baseboard can be available in untreated, lacquered or prepainted versions. Prepainted baseboards can be made from a single piece or finger jointed wood, often softwoods, while hardwoods are either lacquered, or raw for staining and made from a single piece of wood.
Radiators are sometimes installed inside or in front of baseboards (baseboard radiators).
A baseboard differs from a wainscot; a wainscot typically covers from the floor to around 1-1.5m high (waist or chest height), whereas a baseboard is typically just up to 0.2m high (ankle height).
Baseboard / Skirting Board generally has typical variations depending on the country. For example, in China the baseboards are usually very low in height, usually plastic or redwood, and have a very simple or unprofiled design. Whereas in the UK there are a vast number of profiles available and frequently used throughout various periods of construction. e.g. Victorian, Edwardian etc. and many profiles are named after these periods.
- "Skirting Board and Architrave, Full range of profiles". SkirtingBoard.co.uk. Retrieved 2013-12-21.
- "PVCU Skirting Boards". SkirtingBoards.com.