Adding a security lock can help you protect the door, but you also need to protect the glass. If you're concerned about intruders, strengthening the glass is a smart second line of defense.

Start by adding glass window film. Much like the stick-on glass protectors for your phone screen, this film keeps your glass door from shattering. You can also find window film that mimics frosted glass to lower visibility into your home.

You should also add curtains and keep your blinds and shades closed when your door isn't in use. Otherwise, unwanted guests can see inside your home.

While they're a last line of defense, glass break sensors are helpful during a home invasion. When an intruder shatters your glass door, the glass break sensor will notify your home security system and you. This alert tells you exactly when your glass door was broken and connects you to the right authorities to get rid of the intruder.
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