How-to… fit a garage door lock

Because why give low-life an easy life?

How-to… fit a garage door lock

Words and pictures by Alan Dowds

KEEP your bike in a proper garage? Well done you – you've managed to keep away a big chunk of potential crims from your wheels away. But it's fair to say that most garage doors aren't really very secure – made from thin metal, and with a locking system that's positively Victorian. Beefing up the security on your garage door makes a lot of sense – and fitting a proper lock like this one will make it a lot tougher for anyone to get inside. Here’s how to fit one in five easy steps...

1. Get set

Gather some tools – you'll need a pretty tough SDS drill/chisel to make a hole in the ground, some ready-mix 'instant' concrete, and a normal drill to make the bolt holes in the garage door.

Decide where the lock's going, and mark the drill holes on the garage door, using the lock as a template. Drill a couple of pilot holes, then the full-sized ones, and bolt the door part on, hand tight at first.

Close the garage door, and then mark where the door lock hole lines up with the ground. Then, with the SDS drill and chisel, make a hole in the concrete big enough to take the ground section of the lock. This is a bit fiddly – you'll be excavating a big old cavity in the concrete on front of your door, so keep an eye on the position, checking as you go along to make sure the hole in the door lock lines up.

If you don't have solid concrete in front of your garage door, you might need to make a much larger hole, so you have a solid concrete base for the ground section. With paving slabs or monoblock drive, you can remove one slab or block in the lock position, dig a large hole down into the ground, and fill with concrete. It'll have to be big, solid, and heavy enough that baddies can't just lift it out with brute force.

Make sure the lock still lines up, then place the ground section into the hole, and pour your ready-mixed concrete around it. Make sure it's held straight until the concrete sets. Now, you can fully tighten the door lock bolts, and you're all set.

Depending where your garage is, you might want to paint the lock to match the door, so it's less obvious that the security's been increased. Sometimes, a garage door with big locks will attract even more attention – crims will think there's something worth nicking inside.



Great piece easy instructions, just one thing the way you have the allen heads exposed any one with a set of allen keys can remove the part on the door.

Top tip: I have filled the allen heads on my lock with epoxy resin glue however; you can get security allen bolts but you need the security allen keys.

Brilliant well explained and demonstrated, thanks for posting.


Agreed. I never expected this website to post instructional articles, but they've outdone themselves on this one. I'm keen on seeing them post more articles similar to this! now has a new garage door lock perfectly installed thanks to them :)

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Wayne Ogilvie's picture

I am having a problem on installing lock for my garage doors and this guide you shared is so helpful for everyone who needs a tips.

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Always make sure any lock is PAS24 accredited

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DonAllen's picture

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SAT Stained Concrete's picture

I found a wonderful piece of information here, and it will definitely help me a lot. I was searching for some online info regarding this. Keep up the excellent work. Thanks for sharing!

The instructions are very specific and informative. This is just what I was looking for. Thank you so much.

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paul1208's picture

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I think i might missing the right security allen keys or maybe i got mine mixup from the shop.

I've been browsing online more than 3 hours today, yet I never found any interesting articloe like yours.
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You're missing the right Allen keys. Head on over to and I'll hook you up with some neat ones that come along with flints and sharpeners.

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Nice, helpful step-by-step instructions here. It was much easier than i thought!

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I have broken garage door that need to be repared. Thank you for this great information.
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JustDoIT's picture

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Garage doors are typically one of the easiest ways for thieves to enter your home, so this is definitely good advice. It's a good idea to also fortify your front and back door by replacing the hinge screws and the lockplate screws with 3" lag screws so the door is attached to the wall studs, not just the door frame. If you need any HVAC installed in your garage so you can work in there comfortably year-round, head on over to .

Can't agree with this anymore! -

Thanks for your article. Was going to repair my door this weekend and this gave me a few ideas.

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I usually just Google and Youtube stuff like these as I can't trust blogs not showing the whole process. Trust me, I'm speaking based on experience at It's not like a restaurant where you don't need to see how your food is cooked, but it would be cool if we always could.

This is such helpful information, thank you so much for sharing!

Very useful information...the garage door is very important to being secured our car and belongings...
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ery useful information...the garage door is very important to being secured our car and belongings...
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Very good instructions, going to try this out. Wish me luck!

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Ian Mugoya's picture

Thanks for the idea guys

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Thanks for sharing. Going to fix my door now.

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