Quick answer: <p>The cold is the real culprit. Metal locks contract, trapped moisture freezes, and uPVC doors shift out of alignment as frames swell in the damp. Add dark evenings and stiff mechanisms, and keys jam or snap. It rarely comes down to forgetfulness. It is the weather taking its toll.</p>
Every year, as soon as the clocks go back and the cold sets in, my phone starts ringing a good deal more. Winter is easily the busiest time of year for me, and it is not because people suddenly become forgetful. There are real, practical reasons why more folk end up stuck on the doorstep in the dark, and I have seen just about all of them across the Waterside and Southampton.
After nearly 20 years working as a locksmith round here, I can usually guess what has gone wrong before I even pull up outside. So I thought I would share what actually causes those winter lockouts, and more importantly, how you can avoid being the one shivering on the step waiting for me to arrive.
Why does the cold make locks harder to work?
Locks are made of metal, and metal reacts to the cold. When the temperature drops, the internal parts of a lock can contract ever so slightly, and any moisture that has crept inside can freeze. That turns a key that used to slide in smoothly into one that suddenly sticks, jams, or refuses to turn at all.
uPVC doors are especially prone to this. The multipoint locking mechanisms have a lot of moving parts, and when the frame swells or shifts in the cold and damp, the alignment goes out. You end up lifting the handle and forcing the key, and that is often the moment something snaps. Once a key breaks off in the barrel, there is no getting back in without help.
My advice is simple. If your key is getting harder to turn, do not just push harder. That is the surest way to end up with a broken key or a failed cylinder. Give the lock a little attention before the worst of the weather arrives, and you will save yourself a lot of grief.
Dark evenings and rushed routines
The other big factor is nothing to do with the lock at all. It is us. In winter it gets dark by half four, and everyone is in a hurry to get indoors out of the cold and rain. You come home in the dark, fumbling for keys with cold hands, juggling shopping bags, and it is far easier to make a mistake.
I get a lot of calls from people who have simply pulled the door shut behind them without realising their keys were still on the kitchen table. In summer with the light and no rush, they would have spotted it. In winter, with the wind blowing and the dark closing in, it slips past them. Cold fingers do not help either, because they drop keys, misplace them, and sometimes cannot feel that the key has not fully turned.
Frosty mornings bring their own trouble too. People head out early for work, the lock is stiff from the overnight cold, and they force it or leave the door on the latch and it blows shut. It happens more than you would think.
How can you avoid a winter lockout?
The good news is that most winter lockouts are preventable with a bit of simple upkeep. Here is what I recommend to my customers every year.
First, look after your locks before the cold really bites. A tiny amount of the right lubricant in the barrel keeps everything moving freely and helps keep moisture out so it cannot freeze. Do not use household oil like WD-40 as a long term fix, because it can gum up and attract dirt. A proper graphite or PTFE based lubricant is what you want. If you are not sure, ask me and I will point you in the right direction.
Second, if your uPVC door needs lifting hard or the key is stiff, get it seen to now rather than in January. A quick adjustment or realignment while things are working is far cheaper and less stressful than an emergency callout after the mechanism has failed completely.
Third, keep a spare key with someone you trust. A neighbour, a family member nearby, or a friend down the road. It sounds obvious, but so many lockouts would be sorted in five minutes if a spare was close to hand. Just do not hide one under the mat or in a plant pot, because that is the first place an opportunist will look.
Finally, slow down for those few seconds at the door. Check you have your keys in hand before you pull the door shut. In the dark and cold it is worth the extra moment.
What if you do get caught out?
Even with all the care in the world, things go wrong. Keys break, mechanisms fail, and sometimes you just have a bad day. If that happens, do not sit out in the cold longer than you have to. I offer a genuine 24 hour service with no callout fee, so you are not paying just for me to turn up.
Whether it is midnight, a frosty Sunday morning, or the middle of a downpour, I will come out to you across Southampton and the Waterside and get you back inside. If you ever need me, my 24 hour emergency locksmith service is only a phone call away.
Winter need not mean a lockout, but if it does catch you out, you know where I am. Stay warm, look after those locks, and keep a spare key handy.
Which lubricant should you use on your locks before winter?
Here is the bit most folk get wrong. When a lock starts sticking, people reach for the WD-40 under the sink. Don’t. WD-40 is not a proper lock lubricant and it attracts dust and grime that build up inside the barrel, so you are actually storing up trouble for later. What you want is a dry graphite lubricant or a silicone spray. Graphite is ideal for the keyhole and cylinder because it does not trap dust, while a silicone spray suits the moving latches and repels moisture too. Give the lock a puff before the cold sets in, work the key in and out a few times, and you will keep things turning sweetly all winter.
According to my nearly 20 years working across Southampton and the Waterside, the winter lockouts I get called to are very often the ones where a sticking lock was left untreated or given a squirt of the wrong stuff.
What can you actually do to stop your locks seizing up before winter?
Here is the bit most people miss. The best way to dodge a winter lockout is a bit of prevention before the cold sets in. Give your locks a quick treatment with a proper lock lubricant in the autumn, and you will keep the moving parts sliding and stop damp getting a foothold. A graphite lubricant or a silicone spray is the right stuff for the job. Steer well clear of WD-40 on your door locks, mind, because over time it gums up with dirt and grime and causes you more bother down the line. Ten minutes now saves you standing on the step in the dark. And if a key is already sticking, do not force it, just give me a ring.
Frequently asked questions
Why do locks get stiff and jam in winter?
Locks are metal, so they contract in the cold, and any trapped moisture inside can freeze. That turns a smooth key into one that sticks or will not turn. uPVC multipoint mechanisms suffer most, as the frame shifts in the damp, throwing alignment out and risking a snapped key.
How can I avoid getting locked out this winter?
Lubricate your locks with a proper graphite or PTFE based product before the cold sets in, not WD-40. Get any stiff uPVC door adjusted now rather than in January. Keep a spare key with a trusted neighbour, and check your keys are in hand before pulling the door shut.
My key is getting harder to turn. What should I do?
Do not just push harder, as that is the surest way to snap the key or wreck the cylinder. Give the lock some attention with the right lubricant before the worst weather arrives. If you are unsure what to use, ask me and I will point you in the right direction.
What if I get locked out at an awkward time?
Do not sit shivering on the step. I offer a genuine 24 hour service with no callout fee, so you never pay just for me to turn up. Whether it is midnight or a frosty Sunday, I will come out across Southampton and the Waterside and get you back inside.
