Final answer:
Headers are typically required for interior doors on non-bearing walls in construction, but local building codes and specific circumstances may have additional requirements.
Step-by-step explanation:
Headers are typically required for interior doors on non-bearing walls in construction.
A header is a load-bearing structure that supports the weight above an opening, such as a door or window. Non-bearing walls do not carry the weight of the structure above, so headers are not always necessary.
However, local building codes and specific circumstances may require headers even on non-bearing walls, such as for fire protection or sound insulation. It is important to consult local building codes and professionals to determine the exact requirements for interior doors on non-bearing walls.