Primary function of an internal door is to separate different rooms within a house and provide some privacy. If we focus on the opening action, a door can be hinged, in which case they’re either left- or right-handed, which is what most of us have in their home, but also sliding, tilt-up, and folding. Standard width of a single door ranges between 60 and 80 cm, which is a bit more for external doors (90–100 cm), while a tilt-up door, also called a service door, might be as wide as 130 cm if they’re single, or 120–160 cm of they’re double. They’re usually 205 cm high. Doors can be made of wood, glass, metal, a combination of these materials, or be veneered, while some are composed of MDF or OSB panels. When it comes to shape, they can include relief or be smooth, straight, arched, etc. Panels can be either solid or glazed. Those placed at the top are called transoms. Solid wood doors are by far the best, as they’re natural, durable, and sophisticated, but sometimes too heavy. A glass internal door, whether made in one piece or consisting of different parts, brings two rooms together, rather than setting them apart. Check out other advice we’ve prepared, and use our calculator to find out prices of doors of any shape, size, or colour, and the cost of their installation. You can also always contact our experts, who’ll be more than happy to reply.