sharp noise can alert light sleepers and break an intruder’s expectation of silence.
Why It’s Effective
Most break-ins start quietly. Intruders test doors, hoping to find one unlocked. Foil acts like a tamper-evident seal, similar to security tape. Beyond the physical effect, it sends a psychological signal: someone is watching, and the home is unpredictable. That brief doubt can be enough to make opportunistic intruders leave.
Layering Security
Foil works best as part of a multi-layered approach:
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- Place a lightweight cup or pan on the inside handle for a simple
