Many people sleep with their bedroom door open because it feels comfortable, improves airflow, or lets children and pets move around freely. However, fire safety experts recommend closing the door before going to sleep. This simple habit can provide valuable extra time to escape during a house fire, when every second matters.

Modern fires can spread much faster than fires in older homes because furniture, mattresses, carpets, and other materials often contain synthetic materials that burn quickly and create thick, toxic smoke. Escape time can now be only a few minutes, making a closed bedroom door an important barrier between you and the fire.

A closed door can slow the spread of flames, heat, and smoke by limiting the airflow that feeds a fire. Research has found that rooms with closed doors can remain significantly cooler and suffer less damage than rooms with open doors. Most importantly, the door can help keep dangerous smoke outside the bedroom for longer, giving people more time to wake up and escape.

Fire safety organizations promote the simple message, “Close Before You Doze.” It costs nothing and requires no special equipment or training. While an open door may seem harmless, it creates a direct path for smoke, heat, and flames to enter the room.

Closing the door should also be combined with working smoke alarms, tested batteries, and a practiced escape plan with more than one exit route. These precautions work together to improve fire safety. A bedroom door may seem like a small detail, but during a fire, it can become a crucial barrier that provides the extra time needed to survive.