Fire Door Keep Locked - Safety Signs by Caledonia Signs

A “Fire Door Keep Locked” sign is important because it clearly indicates that a specific fire door must remain locked at all times to ensure the integrity of the building’s fire safety system. Some fire doors are installed to protect highly sensitive or hazardous areas—such as electrical rooms, boiler rooms, or secure storage spaces—where controlling access is essential for both fire safety and security. Keeping these doors locked helps prevent unauthorised entry while still maintaining their fire-resistant function.

The sign also reminds staff and building occupants that these doors are part of the passive fire protection strategy and should never be left unlocked or propped open. Unlike standard fire doors that are often kept closed but unlocked, fire doors that must remain locked help contain fire and smoke in critical zones, preventing fire from spreading and protecting adjacent areas.

These signs should be installed directly on or next to fire doors that require locking, typically found in commercial, industrial, or institutional buildings such as hospitals, factories, schools, and large office complexes. Doors leading to high-risk or restricted areas, like plant rooms or hazardous material stores, are common locations for these signs.

Using a “Fire Door Keep Locked” sign helps ensure that fire safety procedures are properly followed, maintaining the effectiveness of fire compartmentation and reducing risk. This clear communication supports safety compliance and helps protect both people and property in the event of a fire.

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.