The optimal gap under a bathroom door is a delicate balance between privacy and ventilation.

While a completely sealed door may seem like the safest choice for privacy, it can lead to poor air circulation and potential moisture buildup, creating an uncomfortable and even unhealthy environment.

According to building codes and expert recommendations, the ideal gap should be between 1/2 inch (1.27 cm) to 1 inch (2.54 cm) from the floor.

This range allows for sufficient airflow to prevent humidity and odor issues, while still maintaining a reasonable level of privacy. - https://bathroomstylish.com/blog/how-much-gap-under-bathroom-door/?unique_id_bbwevzqw

The Ideal Bathroom Door Gap: Balancing Privacy and Ventilation