A non-insulated garage door is a type of garage door that does not have any layer of insulation. It is made of a single layer of material, usually steel or aluminum, and is commonly referred to as a single-layer or monolithic garage door.

Non-insulated garage doors are typically less expensive than insulated doors and are often used in detached garages or in warmer climates where insulation is not necessary. However, they also have some drawbacks compared to insulated garage doors.