How many hinges are typically used for exterior doors?

The typical number of hinges used for exterior doors is three. This configuration provides the necessary support and stability needed for the weight and potential movement of an exterior door. With three hinges, the door is less likely to sag over time, ensures smooth operation, and contributes to security by making it more difficult to forcibly open the door.

Using fewer than three hinges might lead to issues with alignment or operational wear, particularly in heavier or larger doors. Additionally, while two hinges can be adequate for some lighter interior doors, exterior doors require more robust support due to environmental factors and increased usage, making three hinges the standard practice for maintaining functionality and durability.