|Test door, lock sticks out a bit!|
- You need to order the right size (inside and outside). This is the distance from the centre of the lock to the key slot each side. Usually available in 5mm steps. You want it just right, not sticking out, though good locks have a snap off part if someone does take pliers to it.
- You can order keyed alike locks so they all have the same key, which can be very handy. Somehow people don't realise this!
- There are loads of different quality and prices of locks.
- You can have key both sides, or one side with a thumb turn, or just keyed one side and blank the other side even (half lock).
So, when we moved in, the first thing I did on day 1 was order new locks. Five of them. The house had all been recently re-done and the locks in the house already were all brand new, so a bit of a shame. But I wanted higher quality locks and did not want five different sets of keys (don't people know you can get locks that have the same key?).
I ordered like for like, the same size, and keyed both sides as that was what was in the house.
Unfortunately, after a little while we realised the choice of locks was wrong. You do not want keyed both sides. The reason is that the doors were all multipoint locks, and only locked by turning the key. Without that someone can literally walk in from the street (which has happened!). But this means you can only use the door from the inside if you have a key to unlock it. This means if there was a fire in the night when the doors are (obviously) locked, you need a key to get out. Remember the house originally had 5 sets of keys so you need to find the right key for the door by which you are trying to escape from a fire.
The short term fix, a key on a hook by the door, but that is far from ideal. Obviously.
|Thumb turn on inside|
As some of you know, I have a complete door access control system and alarm system, but changing locks means a locksmith and time and money, so even though we have been here over a year I had not yet changed the locks. I was also researching the right lock for the job. Being a house, I really don't want an "exit button" and an "emergency break glass" by every door. I also wanted a "fail secure" so a power cut when we are away (long enough for battery to drain) does not leave all the doors unlocked. But I also want it "safe" so always possible to get out in a fire even when nothing is working electrically.
So the locks are Abloy EL560. I have been testing on my office/study door, meaning we now have six locks. This is great, it is fail secure (i.e. power fail is locked). But it can always be opened from the inside with the handle, and with a key. It also has signals so you know if opened by handle or key. This is great.
However, if it was to be opened from outside using a key, I would want the alarm to know this, and disarm. The idea is we can trust a key. That is fine, I simply configure the system to disarm when the key is used. The system is very flexible and easy to configure for various types of lock.
Except... I have thumb turns on the locks on the inside. I don't need these now as you can open the door with the inside handle. But if I set the system to trust a key it trusts the thumb turn as well. Someone breaking in only has to turn the thumb turn on any door to disarm the alarm. So yes, obviously, it is not being configured to do that (yet). Indeed, one approach would be you have to enter a PIN on the keypad if not using a DESFire fob, even if you did use a key. Given how easily keys, even high security keys, can be copied or 3D printed, this may be sensible anyway.
The real answer is order locks keyed both sides, or even no key at all on the inside now.
I had a full set of locks just like that from when we first moved in. I have disposed of them. Arg! So another set of locks, six this time.
The moral is never throw anything away, ever!... I should know this already.