Safe room

More expensive safe rooms have walls and a door reinforced with sheets of steel, Kevlar, or bullet-resistant fiberglass.

The U.S. State Department often uses steel grillwork much like a jail to seal off parts of a home used by U.S. Foreign Service members overseas when they are living in cities with a high crime threat.

Other homes have steel doors to one or more bedrooms that can be bolted closed to provide time for security forces to arrive.

Safe rooms are typically stocked with basic emergency and survival items such as a flashlight, blankets, a first-aid kit, water, packaged food, self-defense tools, a gas mask, and a simple portable toilet.

High-end safe rooms may have a gun closet, a biodefense air-filtration system that removes biological and nuclear contaminants, and a panic button that locks down the entire house.

[6] When attacked, the crew can retreat into the safe room and call for help (which in the case of ships of some countries may include the intervention of military forces).