Close these Doors At Night - Safety Signs by Caledonia Signs

“Close These Doors at Night” signs are important because they serve as a reminder to close fire doors or specific internal doors during unoccupied hours—especially overnight—when fire risks may go unnoticed. Closing doors at night helps prevent the spread of fire and smoke, protecting sleeping occupants and giving firefighters more time to respond. This is particularly critical in residential buildings, hotels, care homes, and dormitories where people may be asleep and unaware of a fire starting.

Many internal doors, especially fire doors, are designed to act as barriers that compartmentalise a building, slowing the progression of fire. If left open at night, those barriers are ineffective, allowing fire and toxic smoke to travel quickly through hallways and stairwells. These signs act as a simple but effective fire safety measure that reinforces routine safety checks before occupants go to bed or leave the premises.

The signs should be installed on or above fire doors or key internal doors in buildings where night-time occupancy occurs. Typical locations include hotels, hostels, apartment buildings, care homes, student housing, and staff accommodation. They are especially useful on corridor doors, kitchen doors, and stairwell access doors.

Using “Close These Doors at Night” signs enhances passive fire protection, supports compliance with fire safety policies, and improves the safety of sleeping occupants. It's a small action with potentially life-saving consequences, making these signs a vital part of any building’s fire safety strategy.

Materials Explained

Below is a more detailed description of the materials this particular safety sign is available in. Helping you decide which sign option is most suitable for your application.

Rigid Plastic: This lightweight, gloss white PVC is resistant to weather, moisture, chemicals, and general wear and tear, making it suitable for harsh environments. Its smooth, solid surface allows for crisp printing of text and graphics, enhancing readability and visual impact. Businesses who choose Rigid Plastic signs benefit from fewer replacements and minimal maintenance, making it a practical investment for reliable and effective safety signs.

Self-Adhesive Vinyl: Self-adhesive vinyl is easy to apply and it’s budget-friendly. Its adhesive backing allows for easy application to a variety of surfaces such as glass, metal, plastic, and painted walls, which simplifies installation and reduces setup time. Self-adhesive vinyl provides a clean, professional finish that suits many indoor environments including offices, retail, industrial sites, and vehicles. It is more affordable than many other material types and allows for custom shapes, colours, and graphics.

To achieve high performance in low light conditions and conform to ISO 16069 we recommend using Ultra Bright.

Ultra Bright Photoluminescent Rigid Plastic: Ultra Bright rigid plastic has a photoluminescent (glow in the dark) pigmentation which offers a highly effective, reliable, and energy-free visibility in low-light or blackout conditions, making them ideal for emergency exit applications. The afterglow properties exceed PSPA Class C grade, as measured to DIN 6751, provides razor sharp definition in blackout conditions.

Ultra Bright Photoluminescent Self Adhesive: Ultra Bright self adhesive vinyl is a flexible PVC with photoluminescent (glow in the dark) pigmentation. The self-adhesive backing enables quick, tool-free application on smooth, clean surfaces like walls and doors. The afterglow properties exceed PSPA Class C grade, as measured to DIN 6751, provides razor sharp definition in blackout conditions, making them ideal for emergency escape applications.