My front door has a deadbolt, but right next to the knob/deadbolt is a tall narrow window, so that you can see whoever is outside. This is a security risk as anyone could smash that window and open the lock from the outside.
Is there a way to secure a door like this, without removing the window? The one idea I know if is a deadbolt where you need a key to open it even from the inside, but I don't think our code allows this for the front door.
There is a product called Window Security Film which is a thin (a couple mm) film that adheres to the window and makes it exceptionally difficult for someone to break. Many lock smiths/security companies can install it. Here's a video of it in action: http://www.youtube.com/watch?v=vYdVK3BqPfk
This is a duplicate of my answer from this question.
Option A: Alarm system.
Option B: Deadbolt with a captive key feature. The interior knob can be removed turning it into a double cylinder lock. Check with your local codes to see if this is permitted.
I had this type of window when I bought my condo. Luckily it was just the right width to replace the single pane of glass with glass bricks. Better security and better insulation.
If there is only a window on one side, you could get a new door that has the hinge on the other side (or possibly flip your existing door).
You can put a grate on the window nearest the interior bolt; there's a product called Mr. Goodbar that is made of 3/16 steel rods, spaced about 1/2" apart from the pictures. I'm ordering one now (will have to cut it down to fit).
The best type of lock for that situation would be to get a double sided deadbolt. So if someone where to break the window they would be able to unlock the door, they would still need a key from the inside.
