What is the recommended bottom clearance for placing a door?

The recommended bottom clearance for placing a door is typically 1/2" or more to ensure adequate space for proper operation and to accommodate any potential expansion of materials due to humidity and temperature changes. This clearance helps prevent the door from dragging on the floor, which can cause wear and tear on both the door and the flooring. Additionally, a 1/2" gap provides sufficient room for a door sweep or threshold while still allowing for air circulation, which can be important in maintaining ventilation in a building. Having this specified amount of clearance is particularly crucial in environments that may have varying moisture levels, thereby promoting functionality and durability of the door installation.