Upholstery

Upholstery is the work of providing furniture, especially seats, with padding, springs, webbing, and fabric or leather covers. The word upholstery comes from the Middle English words up and holden, meaning to hold up. The term is applied to domestic furniture and also to applications in automobiles and boats. A person who works with upholstery is called an upholsterer; an apprentice upholsterer is sometimes called an outsider or trimmer.
The materials which are important to the quality of an upholstered product, such as a bed, sofa, chair or ottoman, may be considered in four categories: the frame (usually wooden) on which the upholstery is to be constructed; the spring system; the cushioning or padding; and the final fabric or leather covering.
The life of a piece of upholstered furniture begins with its frame: although the underlying wooden framework cannot all be seen in the finished product, the type of wood used to create it will have a bearing on the quality of the final product. Where parts of the frame, such as chair legs, may be seen outside the upholstery these are termed "show-wood".
Some furniture employs softwoods, but may suffer from its difficulty in supporting the joinery that is required for the best quality furniture. The tight graining of hardwoods allows for pegs, screws and tacks to be set securely, reducing the likelihood of their becoming loose over time. Hardwoods used in upholstered furniture include oak, alder and other woods with tight graining. Hardwood laminates are often used for blocks and braces because laminates are actually stronger than solid wood in these applications.