Close before you doze

A few simple acts can save your life in the event of a home fire.

Get the Facts

Fire is getting faster

Because of synthetic materials, furniture, and construction, fire spreads faster than ever before. Closing doors helps stop the spread of fire.

Make a 900° difference

Research proves a closed door can mean the difference between 1,000 degress and 100 degrees in the event of a fire.

Take it down a notch

During a fire, a closed door can keep carbon monoxide levels at 1,000 PPM verses 10,000 PPM when a door is left open.

Good Morning America covers Close Before You Doze, and other important fire safety messages

See a real life demonstration of how a closed door can make a potentially life saving difference.

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The science of safety

Close Before You Doze is brought to you by UL's Fire Safety Research Institute (FSRI), a group dedicated to increasing firefighter knowledge to reduce injuries and deaths in the fire service and in the communities they serve.

As part of UL’s nonprofit organization, FSRI collaborates with the global fire service to generate and share life-saving fire safety science knowledge and develops cutting edge, practical education aimed at helping firefighters and the communities they serve stay safe by more effectively protecting people and property.

Are you a first responder?

Most people don't know the difference a closed door makes in a fire. You can change that.

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In the news

Closed doors are helping save lives. Learn about real-life incidents and see coverage of Close Before You Doze in action.

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Underwriters Laboratories is a nonprofit organization dedicated to advancing the UL public safety mission through the discovery and application of scientific knowledge. We conduct rigorous independent research and analyze safety data, convene experts worldwide to address risks, share knowledge through safety education and public outreach initiatives, and develop standards to guide safe commercialization of evolving technologies. We foster communities of safety, from grassroots initiatives for neighborhoods to summits of world leaders. Our organization employs collaborative and scientific approaches with partners and stakeholders to drive innovation and progress toward improving safety, security, and sustainability, ultimately enhancing societal well-being. To learn more, visit