 The brick building is topped with a tiled double-pile hipped roof with corbelled eaves.It has sliding doors at each end, giving access to the boiler and engine houses, blacksmith's and engineer's shops.Much of the original machinery survives, including steam-powered plant from the mid-1880s, these include a Whitworth planing machine, a Whitworth slotting machine, punching-and-shearing machines, a long-bed lathe and a steam hammer.