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Key Question: How to lock an internally opening door from the outside. I know that I could use a security hasp (image) or I could change the doornob but I am trying to avoid these two options.

enter image description here

Why can't I change the door nob: Rented apartment. Door knobs have centuries of paint over them. Would probably need to touch up paint to do a good job.

What are the problems with a security hasp:

  • Ugly
  • Sharp
  • Makes noise when you open/close the door

Background: Hiring a cleaning lady, want to prevent her from entering our offices. Offices have doors that open inwards.


Edit: Current door knob looks like this:

enter image description here

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Maybe a doorknob lockout device would work:

enter image description here

  • The door itself doesn't have a lock on it. This looks like it takes advantage of the existing lock on the door. – sixtyfootersdude Aug 14 '17 at 14:27
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    Dude, in your question you stated "Why can't I change the door nob: Rented apartment. Door knobs have centuries of paint over them. Would probably need to touch up paint to do a good job." Anybody would presume from your statement that the door has a knob-type lock/latch on it... – Jimmy Fix-it Aug 17 '17 at 1:02
  • Sorry, should have specified in my question that my current door knobs don't have a lock. If they did, I would just use that. I edited my question with a picture of the style of door knob. – sixtyfootersdude Aug 17 '17 at 13:35
  • @sixtyfootersdude so to be clear, there's no keyholes like shown in your picture? – Niall Aug 17 '17 at 17:47
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    @sixtyfootersdude then presumably there's a sashlock in the door? You can try and get a key for that. On a new lock you would simply need to find the key number and pick one up. If it's very old then you might need to get a lock-smith to make one. Failing that you could replace the sashlock with a new one (would force you to take off the door handle but you putting it back in exactly the same spot so paint shouldn't be an issue. – Niall Aug 17 '17 at 21:31
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You should install keyed surface mount deadbolts, so they can be opened from the inside without the key. Otherwise, it's an extreme fire hazard.enter image description here

  • Trying to avoid drilling large holes in the door. Would like something that is easily removable when we move. – sixtyfootersdude Aug 14 '17 at 14:28

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