After responding to thousands of break-ins and security emergencies across the UK, our locksmiths have noticed the same preventable mistakes again and again. Burglars are opportunists, and these common errors make their job far too easy. Here are the five biggest home security mistakes we see, and how to fix them before it is too late.
Most break-ins happen in under three minutes. The burglar is not picking a lock — they are walking through an unlocked door or finding your hidden key. Convenience should never outweigh security.
1. Hiding a Spare Key Outside
Under the doormat, inside a fake rock, above the door frame, under a plant pot — burglars know every hiding spot. If you have ever seen a movie character find a spare key, so has every thief. Modern techniques include using metal detectors and simply checking the obvious places. If you need spare key access, give one to a trusted neighbour or use a secure key safe with a combination code, bolted in an inconspicuous location. Alternatively, our key cutting service can make duplicates at minimal cost.
2. Leaving Doors Unlocked "Just for a Minute"
Popping to the corner shop, taking the bins out, or answering the door while leaving the back door unlocked seems harmless. But burglars are fast. An experienced thief can be in and out of your home in under three minutes. The back door is a favourite entry point precisely because homeowners leave it unlocked while distracted at the front. Lock every door, every time, even if you are only stepping away briefly. If you have ever been locked out, you already know how quickly an unlocked door becomes an emergency.
3. Neglecting Side and Rear Doors
Homeowners often invest in a beautiful, secure front door but completely ignore the side gate, back door, or French windows. These are frequently fitted with cheap, outdated locks that can be forced in seconds. We recommend British Standard locks on every external door, including side gates and patio doors. UPVC French doors should have anti-snap cylinders and multipoint locking.
4. Announcing Your Absence on Social Media
Posting holiday photos in real time, checking in at airports, or sharing that you are "away for the weekend" is an open invitation. Criminals monitor social media for exactly this information. Even if your profile is private, friends of friends may see your posts. Wait until you are home to share holiday photos, and avoid mentioning extended absences online. While you are away, consider scheduling a security survey before you leave.
5. Outdated or Non-British Standard Locks
Many homeowners assume their locks are fine because "they still work." But older locks lack modern anti-pick, anti-drill, and anti-snap features. A lock that was state-of-the-art in 1995 is now trivially easy to defeat. Check for the BS3621 kitemark on your locks. If they do not have it, they probably do not meet current insurance requirements either. Upgrading is affordable and fast — our lock change service can be completed in under an hour.
Bonus Mistake: No Security Maintenance
Locks need maintenance. Hinges sag, bolts misalign, and mechanisms accumulate dirt. A door that was once secure becomes loose and vulnerable over time. Schedule an annual check-up with a professional locksmith to catch these issues before burglars do. Regular door maintenance can prevent small issues from becoming security risks.
Avoiding these mistakes takes minimal effort but delivers enormous security benefits. For a comprehensive assessment of your home's vulnerabilities, book a security survey with Keys4U. Our locksmiths will identify every weak point and recommend practical, affordable fixes. Call 033 3305 2993 today.