Understanding Common Joinery Terminology

The world of timber joinery is rich with specialized terminology that can sometimes be confusing. At Next Level Joinery, we aim to demystify these terms to help you better understand our products and services.

Mullion. A mullion is a vertical or horizontal element that divides adjacent window units. In timber joinery, mullions provide structural support and contribute to the aesthetic design of the window.

Sash. The sash is the movable part of a window that holds the glass. In sash windows, there are typically two sashes that slide up and down or side to side within the frame.

Jamb. The jamb is the vertical component on either side of a door or window frame. It provides structural support and houses the hinges and locking mechanisms.

Stile. Stiles are the vertical components of a door or window sash. In timber joinery, stiles are crucial for the stability and integrity of the unit.

Rail. Rails are the horizontal components of a door or window sash. They work in conjunction with stiles to form the framework of the joinery unit.

Transom. A transom is a horizontal crosspiece above a door or between a door and a window. In timber joinery, transoms add architectural interest and allow for additional light and ventilation.

Understanding joinery terminology is key to making informed decisions about your building projects. At Next Level Joinery, we are always here to help clarify any terms and provide expert guidance. Contact us for more information on our high-quality timber joinery products and services.