SCIF walls must extend from true floor to true ceiling.

• A. True
• B. False
• C. Walls may be partial height
• D. Walls must be at least 8 feet tall

Answer: (A)

SCIF walls are meant to form a continuous, sealed boundary around the secure space. Extending from the true floor to the true ceiling ensures there are no gaps or bypass routes—no opening above, below, or through the boundary—where information could be leaked, signals could escape, or someone could physically access the area. A wall that ends short of the ceiling or floor creates vulnerabilities such as lines of sight, acoustic leakage, or gaps for cabling and other penetrations to bypass security controls. By reaching the actual floor and ceiling, the boundary remains intact, and doors, utilities, and penetrations can be properly sealed to maintain the integrity of the secured environment. Partial-height walls or height-based rules do not guarantee this complete enclosure, which is why they don’t meet the requirement.