How to replace garage door lock-set?

Hi Folks,
A mate of mine called me up the other day, as he's just bought an older type house and he would like to be able to secure the garage door.
These were the pictures he sent me of the lock-set that is currently installed in the door:

Inside of doorOutside of doorExisting door catch

Bearing in mind that this is a door that is made out of tongue and groove timber slats, with a strip of timber across the centre of the door that holds the existing lock arrangement in place.
The catch has seen better days as it is all bent out of alignment and sometimes does not lock or unlock.
The width/thickness of the door and the timber strip on the back of it is approximately 42mm.
The width of the timber that the catch sits on is 45mm, between the rebate in the frame where the door contacts when closed.
The guy wants me to convert this to a readily available lock set and striker plate, looking through the Bunnings product list,
I'm sort of at a loss as to how I would do this, I have some ideas, but I need your thoughts as well.

If you need further/better pictures, by all means let me know.

Cheers,

Mike T.

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Accepted answers

AlanM52

Hi @MikeTNZ,

The main issue is the backset distance between the cylinder hole centre and the edge of the door.

Door 1b.jpg

That looks over the usual 60 - 70mm so can you measure that distance.

I suspect I would end up using this:

Screenshot 2025-07-20 120657.jpeg

And retrieve.

whats-the-trick-for-getting-the-cut-piece-out-of-a-damn-v0-y26z66pxnk6f1.jpg

the core to fill the original hole along with wood filler.

There are lots of videos on how to install the lockwood dead latch:

https://www.youtube.com/watch?v=oDbMZC634z0&t=44s

Cheers

All comments

AlanM52

Hi @MikeTNZ,

The main issue is the backset distance between the cylinder hole centre and the edge of the door.

Door 1b.jpg

That looks over the usual 60 - 70mm so can you measure that distance.

I suspect I would end up using this:

Screenshot 2025-07-20 120657.jpeg

And retrieve.

whats-the-trick-for-getting-the-cut-piece-out-of-a-damn-v0-y26z66pxnk6f1.jpg

the core to fill the original hole along with wood filler.

There are lots of videos on how to install the lockwood dead latch:

https://www.youtube.com/watch?v=oDbMZC634z0&t=44s

Cheers

EricL

Hello @MikeTNZ

Looks like @AlanM52 beat me to it. I was going to suggest the classic Ikonic Satin Chrome Rim Night Latch, but the Lockwood 001 is a far superior product and is easy to spot if its locked or not on the cylinder indicator. My best advice is to install a secondary lock such as the Pinnacle 200 x 12mm Galvanised Steel High Security Padbolt if you want a backup lock on the door.

If you have any other questions we can help with, please let us know.

Eric

AlanM52

Hi @MikeTNZ,

RE: Beat me to it.

With everyday life I am usually one of the last to arrive 🙂

We are on the same page and that night latch brings back nice memories about one of the old family homes.

Actually the padbolt was my first suggestion but I changed to the Lockwood.

Cheers

Nailbag

Hi @MikeTNZ

The Lockwood 001 uses a standard 60mm backset. I know as I install them regularly including last Friday. This doesn’t stop you from using it as I would simply use builders bog to fill the existing holes and start fresh. This also would mean you could consider traditional deadbolts.

If you are trying to keep the same backset, there are extended latches available online that are just longer in the body but with fitment otherwise standard. I had to replace one some time back that had I think a 120mm backset.

Nailbag

MikeTNZ

Hi @AlanM52, @EricL, @Nailbag,

Thank you one and all for your excellent advice!

The Lockwood 001 never even occurred to me, I got the guy to measure the back-set on the existing lock and he said it was

something like 115mm??, I'm not sure I believe that, but looking at the photo he sent me, he may well be right.

I have a feeling that this may put the hole for the new lock cylinder between where the existing doorknob and the keyhole is,

although I can't see that being an issue, if these are filled with putty and painted over.

Thanks for your help, guys, I really appreciate it.

Cheers,

Mike T.

Nailbag

Hey @MikeTNZ

Very early door furniture commonly had longer back-sets. So, your guy is probably correct. Filling with builders bog will be the best to use when replacing with a 001 or any other style. Just use a a hard flat plate of some material taped to the other side when using the filler.

Look forward to the next chapter with pics Mike.

Nailbag

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