Security Advice

Security advice

Security Advice

The SheffLOCK Home Security guide gives you tips on how to best keep your home secure, such as improving door & window lock security, how sash jammers work to how a poorly fitted lock can lead to break-ins.

The main security advice for your home is to speak to SheffLOCK with regards to the security products that you have fitted to your doors and windows.

In terms of some general security advice we suggest:
Door and Windows Security

Door and Windows Security

Ask a locksmith to review your door and window security (including internal doors to conservatories and garages) to make sure all windows and doors have the most appropriate locks:

Are they in good condition Properly fitted? – incorrectly fitted euro locks can lead to lock snapping And meet your insurance requirements Concerned about lock snapping? Read our guide here

Poorly Fitted Euro Lock

Poorly Fitted Euro Lock

Euro Cylinder fitted incorrectly on front door. A euro cylinder lock that has been poorly fitted is at risk of being snapped.

Do your front and back door have anti-snap locks fitted?

Add anti snap locks to your front & back doors. They can protect your euro lock cylinder from being a victim of lock snapping.

Although you must make sure you have the correct size and lock standard fitted to be truly anti-snap.

How a anti snap lock prevents burglary.

We gaurantee the best price for ULTION anti snap locks in South Yorkshire.

Upgrade Your Door Handles

Upgrade Your Door Handles

Consider upgrading your door handles when you change your locks. Standard door handles offer little protection and can be broken in seconds.

We highly recommend that 2 star Lock Lock door handles are fitted with 3 star Ultion anti snap locks to provide you with 5 star protection. This is the highest standard of protection available.
3 star security standard

Upgrade your Locks to BS3621 British Standard

Have your home locks upgraded to BS3621, a standard which most insurance companies require your locks be fitted to.

BS3621 is a British Standard where locks are tested against common burglar techniques such as drilling and picking.

Locks that can be upgraded to BS3621 include Mortice Locks, Night Latches ( Yale Locks ) and Rim Cylinder locks.

If you live in a block of flats or apartment the standard BS8621 is recommended which allows anyone to exit in an emergency without needing a key.

Lock Advice – Contact us at SheffLOCK for friendly advice or visit our advice pages about approved locks.

Sash Jammers

Sash Jammers: Protect UPVC Doors & Windows

You may also want to install top and bottom bolts on French doors or add sash jammers to UPVC doors or windows.

Sash Jammers STOP a door or window from opening. They are easy to fit and cheap and can be fitted to wood doors and windows.

Sash Jammers are relatively cheap, we can supply and fit sash jammers.

French Door Security

French Door Security + Patio Doors

Before adding additional security any French doors should have the following standard of lock and/or handles fitted:

The lock cylinder should be to approved TS007 3star standard. Door handles should be toapproved   TS007 2star standard.

Patlock stops burglars opening your door. If you have French or patio doors you may want to consider adding a Patlock which ensures the door cannot be opened by holding the internal handles in place.

We recommend fitting the 2 star Lock Lock Door handle with the Ultion 3 star anti snap euro cyclinder lock

Digital Door Viewer

Digital Door Viewer

Sees who’s at your door before you open it with a digital door viewer.

The advantages of a digital door viewer and common features on most viewers are they are easy to fit and install in a new place or existing door and easy to remove if you move.

Ideal for apartments and flats where you can find out who’s at the front door and remotely allow them access.

Maybe of use to the elderly who can converse with visitors without having to leave the comfort of their living room for example.

Door Chains

Door Chains

Another way to check who is at your door before opening is by fitting a door chain. There are now door chains available for uPVC and composite doors which are very simple to fit and not expensive, they can prevent distraction burglaries.

We recommend making sure your door chain is “Police Approved” which means the chain is accredited by Secured By Design.

The cost of purchasing a Police Approved door chain is from £20 and you may want to consider getting it professionally fitted.

We can supply and fit approved door chains.

Letterbox Security

Letterbox Security – Prevent “Fishing” add a Letterbox guard

Adding a letterbox guard (letterplate) can help prevent letterbox fishing where criminals try to remove your house keys through your letterbox. Letterbox-Guard-prevents-Fishing A Letterbox guard can stop thieves ‘fishing’ for keys


Prevents letterbox fishing & lock manipulation (opening door lock through the letterbox ) Letterbox guards can be fitted to uPVC, wooden and composite doors. We recommend that any letterbox guard is approved to TS008 standard.

Price – Letterbox guards that are accredited to TS008 can cost from around £30 to purchase, excluding fitting.

Security Bars

Security Bars to protect Windows

Side windows in a house can be smashed to reach keys and gain entry so consider adding reinforced glass or maybe even block up the window.

Security-Grilles-fitted-to-Home-Window. Security Grilles can be fitted to domestic Homes

Decorative grilles and bars can also vastly improve the security of a home without being detrimental to the aesthetics.

Types – There are various types of security grilles from fixed to collapsible. Difficulty to fit – We recommend get fitted by an expert

Benefits– ideal way to add extra security and stop people breaking a window and being able to gain entry through it.

Remote CCTV

Remotely Accessible CCTV Systems

A remote CCTV system is an effective way to keep a watchful eye on your property while you’re not there.

Advantages of a Remote CCTV System

Some can be remotely viewed either via Internet access or by smartphone. Some alarms can notify you when the alarm is activated, allowing you to check what’s going on in your home.

Home CCTV System

The only thing worth highlighting is that you shouldn’t confront any intruders you see via your remotely accessible security and should simply notify the police.

For guaranteed police response you will require a professionally installed and monitored alarm system.

Security Alarms

Security Alarms – Regularly Change The Code

Alarms can be very effective but you need to change the code regularly to gain maximum benefit from them.

PIR security lighting

PIR Security Lighting

Dusk to dawn or sensor lighting to the front and back door of your home will deter potential thieves and help you gain entry into your home in the dark

Solar PIR lights can be fitted with two screws and no mains wiring.

Benefits – helps keep areas light when motion is sensed. Burglars don’t like the light as they don’t want to be seen so fit them high enough so that they will not be damaged.

Install Light Timers

Install Light Timers

Consider installing a number of light timers around the house so it appears someone is home, as opportunist thieves can often approach houses that look like nobody is at home

Light Timers used in Home. Light Timers to deter burglars

Easy to fit – Light Timers are usually easy fit as they simply plug into power socket without any need for complications installations.

Benefits – can make it seem like the property is occupied

Home Security Safes

Home Security Safes – Hide Your Valuables

Home safes are becoming cheaper, so you may want to consider asking SheffLOCK locksmiths to specify and install a security safe.

Fireproof safes are available so you can store important documents such as a passport, drivers license and digital media.

Ensure you purchase the correct rating of safe and ensure it’s professionally fitted as this will dictate the amount of cash/jewellery covered by your insurance company.

Insurance Approved Safes

Look for independent approval such as the AIS logo or Sold Secure approval when purchasing a safe, as this usually automatically means the safe is insurance approved.

Keyed Alike

Replace Your Keys or try ‘Keyed Alike’

While you are reviewing your security it is also worth considering when your keys were last replaced.

Do past owners or tenants may still have access to your home? and has anyone may had copies of your keys made without your knowledge.

a) One Key for all your door locks = Keying Alike. So you only have one key for your front and back door locks consider having your locks keyed alike, this means if you ever lose your keys you will only have to replace one key.

b) Keys Cannot be copied = Patented Keys. Prevent anyone from copying your keys by fitting a patented system, this means keys can only be copied with proof of ownership.

Garden Shed Security

Garden Shed Security

Make sure you source a good quality lock to protect your garden shed and its contents if you have one.

Use a Sold Secure approved padlock, that is independently tested against numerous criteria, to prevent break-ins.

Shed shackle on wooden sheds

A shed shackle can prevent items from being stolen during break-ins on wooden sheds. Chain the items you want to keep safe (e.g. power tools or bikes) to the shed shackle to keep them safe.

Review the exterior of your property to make sure there are no broken windows or access to your property through garages or conservatories.

Lock any tools and items such as ladders away.

hanoi burglary

2 in 1 burglarly targets car keys

Statistics show that thieves are increasingly breaking into homes to steal car keys so don’t make it easy for them by leaving keys in view

Car keys at home Don’t leave your car keys on view

If you have lost your car keys we recommend the cheapest and fastest way is to use the services of an auto locksmith.

Read our article on Keyless car theft here if you have a keyless entry car

Security Habit

Security Habit

Consider your own influence on the level of security for your home and make sure you don’t indulge bad habits such as leaving keys in locks or in view that you and your family may have.

Simple tips to remember;

  • Setting your alarms
  • Changing alarm codes on a frequent basis
  • Lock any side or back gates
  • Take the key out of your locks
  • Key left in UPVC door lock Remember to take your key out of the lock

Sheffield locksmiths

SheffLOCK: Sheffield Locksmiths

Take a note of this number for SheffLOCK: Sheffield Locksmiths 0114 442 6200 and put the number in your contacts list on your mobile phone.

If you do find yourself in the unfortunate situation of being locked out of the house someone will be able to help you get in out of the cold as soon as possible.

Using a SheffLOCK locksmith ensures that locks and security equipment are fitted correctly and safely in accordance with current standards and regulations.

mortice lock
Locked Out of House Flat Apartment or Business

A locksmith can help with apartment, flat & office lockouts. If you are locked out of your home, flat or office a SheffLOCK locksmith can pick the lock open securely without damaging the lock. Common lockout problems we can help with are:

  • Locked out with no key
  • Locked out with Key Inside in Door
  • Stuck in Lock and door won’t open
  • Key snapped or broken in lock
  • Locks a Locksmith can Unlock and Open
mortice lock

Unlock Doors

A SheffLOCK locksmith will be able to unlock and gain entry to all types of door locks including the following:

  • Euro cylinder locks including Anti Snap locks
  • Night Latches
  • Mortice locks – 3 lever and 5 levers
  • Locks fitted to Wooden Doors
  • Locks fitted to uPVC Door locks & Composite doors

Locked out late at night or early morning?

As a 24-hour emergency locksmith we pleased to open your door.

mortice lock
Locked Out with a Broken lock?

If your door lock is broken or damaged, SheffLOCK locksmiths will be able to open the door and advise on replacing your broken lock, if necessary they can also help on upgrading your locks.

As door lock replacement is a specialist area, SheffLOCK can help with the following:

  • Replacing the lock if it is damaged or faulty
  • Changing and Fitting a new lock
  • Upgrading locks to BS3621 to meet insurance requirements.
mortice lock
Locked Out with Key Snapped in Lock

If you have snapped your key in the door lock, SheffLOCK locksmiths can remove the snapped key and open the door by doing the following:

  1. Remove the key from the lock (without damaging your lock)
  2. Open the lock and let you in
  3. Cut a new key to fit your lock
For the cost of replacement keys see our key cutting price list.

mortice lock
Locked out of a uPVC Door?

UPVC doors change shape slightly in hot conditions and require adjustment. Try not to force it to lock and call us to re-aligned your upvc door

Do not keep forcing a uPVC handle up to lock it – you should be able to just lift it, if not adjustments are all that is needed usually!

mortice lock
Keys cut after being locked out of house

After being locked out you may need to replace your keys, a SheffLOCK locksmith can replace any type of key even if the key is broken. Once the door is opened the SheffLOCK locksmith can cut a new key by hand to suit your lock.

For advice on getting keys cut please see our key cutting guide page.

mortice lock
How to prevent being locked out of house

To prevent you from being locked out of the house or flat again, we recommend the following:

  1. Roller rim locks can be fitted they need a key to be turned in the cylinder to lock them from the outside.
  2. Door restrictors can stop the door from shutting behind you
  3. Checking/Oil locks People seem to forget about checking/oiling their locks and doors checking for worn keys badly cut keys (we all see them) and not sorting out a problem until it is too late prevention is better than cure.
  4. When a door starts to stick a key won’t turn in the cylinder properly check it out don’t let it get worse.
mortice lock
Sheffield Locksmith near me

If you do get locked out a SheffLOCK qualified & vetted locksmith should be able to get you back in without damage (unless the lock has broken) with as little inconvenience as can be done.

All SheffLOCK locksmiths have been vetted and have nationally recognised qualifications to ensure you get the highest level of service.

mortice lock

Lost your keys?

A SheffLOCK locksmith will be able to help if you have lost your keys and are locked out of the house, if your keys are lost, a locksmith who does key cutting can cut a new key immediately for any type of door or window lock.

You could be locked out of your house/flat and lost your front door or back door keys, or even just need some replacement UPVC window or door keys, had your keys stolen or been a victim of a burglary.

mortice lock
I’ve lost my only set of House Keys

If you lose your only set of house keys that may contain either your front or back door key the following advice will help:

A SheffLOCK Locksmith can cut you a new key without having the original.

The locksmith can change & replace locks to keep you in compliance with BS3621.

Have a spare key cut to save time and cost if you lose your keys again.

mortice lock

Lost keys a SheffLOCK locksmith can replace

  • Lost Front or Back Door Key for home – cylinder & mortice locks
  • Patio door key
  • Lost Garage Door Key
  • uPVC Door and Windows
  • Safe keys – tricky to cut will require an expert key cutter
  • If you have lost the keys to your car you will need to a contact an auto locksmith
mortice lock

Help I’ve lost my front / back door keys

If you have lost your front or back doors key for your house, the solution a SheffLOCK locksmith will:

  • Help you gain entry to the property
  • Change the lock for security preventions to eliminate the use of your old keys
  • Cut keys for your new lock
  • Locksmiths are Vetted, Inspected & Qualified.
mortice lock

If you are having your locks changed then you may want to consider:

  1. Upgrading to higher security locks such as anti-snap
  2. Making sure your new locks meet insurance requirements such as BS-3621
  3. Keying your locks alike – one key to work all locks
  4. Consider upgrading the multipoint locking system on the door to help improve security
mortice lock

Lost key for UPVC Door

If you have lost the key to a uPVC door then your local SheffLOCK Approved locksmith will be able to:

  • Help you gain entry to your property
  • Replace the door lock cylinder
mortice lock

Lost Window Key

Window keys are one of the cheapest and easiest keys to cut. If you have lost your window key, a locksmith will be able to provide a new key for all types of window locks such as keys for uPVC window locks and keys for window handle locks.

mortice lock

Lost Garage Door Key

If you have lost the key to your garage door lock and need a replacement garage door key cutting this is a very simple job.

Garage door keys are cheap and fast keys to replace due to them being easy to cut.

Garage doors keys are usually slightly different in appearance to normal house keys, but a SheffLOCK locksmith will have no problem in cutting a new key for you.

mortice lock

Door Lock Replacement & Fitting

A local Locksmith can fit, replace and change all types of door locks such as:

  1. uPVC door locks – on front and back doors
  2. Garage door locks
  3. Euro lock cylinders – anti snap – on front and back doors
  4. Mortice Locks – deadlock / sashlock
  5. Yale Locks (Night Latches) – on front and back doors
  6. Rim cylinders for Night Latches easily replaced
  7. Patio door locks
  8. British Standard Locks
  9. Smart Locks
  10. Keyless Entry Locks.
mortice lock

BS 3621 Door Locks

BS3621 locks have a British Standard Kitemark on the metal face plate of the lock in the edge of the door and come in a variety of sizes to replace standard locks.

BS3621 standards locks are found on doors where the door and door frame are made of wood.

Ground floor exterior doors usually have BS3621 Standard Lock and can be fitted on interior doors. Doors above ground floor are tested to BS8621 which is the same security level and would also carry a BSI kitemark symbol.

Mortice Lock & Cylinder Rim Locks can be required to meet BS3621 or BS8621. Door Lock Replacement & Change A locksmith can replace and fit all door lock types usually found on residential/commercial properties, which are the below three types of door locks:

night latch lock
1. Night Latch Fitting & Replacement

(often referred to as a Yale type lock)

There are many different types of night latches with sizes, which are mostly used on front and back doors.

Night latches a locksmith can change: A locksmith can replace all types of night types, including the rim cylinder and even upgrade your existing rim lock, such as below: Standard Traditional Night Latch Deadlocking night latch Auto dead locking night latch Double locking night latches Unsure about the type of night latch to fit or change? See our guide to night latches here.

A Yale Nightlatch Type Lock What a nightlatch looks like About Night Latches How it operates: Pull or ‘slam’ door shut (the door is latch locked) and requires a key to open from outside On the inside: the latch part of the lock is retracted usually by operating a small lever or handle. Should NOT be the only lock on the door Standards: to meet BS3621 & BS 8621 – Read our BS3621 Lock guide here Door types: Used on front/back and other entrance doors and mainly wooden doors Leading manufacturers of Nightlatch locks: Yale Ingersoll Era Price of Night Latch Lock Replacement The cost of a nightlatch replacement lock can be found on our locksmith price list here
mortice lock

2. Mortice Lock Fitting

This type of lock is normally fitted inside the door, they are difficult to pick open as the lock mechanism is fitted in the door frame.

Each lock has between 2 levers and 5 levers, the more levers usually means the more secure the lock is.

Insurance companies prefer this standard as it means the lock has been tested against popular types of attack for a certain period of time.

Mortice locks are commonly found on wooden doors & sometimes aluminium with leading manufacturers of Mortice locks being Union (formally Chubb), Yale, Era, Asec, Securefast.

Mortice Sash Lock Fitting

A mortice sash lock is normally fitted to a wooden door on a domestic home, sash locks are opened by using a key and the handle. A mortice style lock with a handle is called a sash lock. A lever operated mortice sashlock on wooden door. The handles operate the latch on the lock which keeps the door shut when pushed or pulled closed.

Mortice Deadlock Fitting & BS3621 Mortice Deadlock

A Mortice Deadlock is commonly fitted to a wooden home front door, and can only be opened with a key, it locks on the inside and outside. Does NOT have a handle – a deadlock does not have a handle and is always operated by a key, opened from one of both sides by key. A lever operated mortice deadlock on wooden door.

The cost of a mortice deadlock replacement lock can be found on our locksmith prices page

mortice lock

3. Euro-Lock Cylinder Fitting

This type of lock is very popular and found on many different types of door locks and security applications. ABS SS312 3 Star Euro Lock Cylinder with key Euro-Lock Cylinder found on front/back doors Door types a euro lock cylinder is found on: UPVC Aluminium shop front doors Timber multipoint door locks Apartment doors Key switches that operate roller shutters on business premises and much more. ABS Euro Lock Fitted to door A fitted Euro lock cylinder on a front door Euro locks come in an array of sizes and security levels and different finishes to suit application and hardware fitted or required. Standards of Euro Lock Sold Secure SS 312 for cylinders only TS007 for cylinders only BS 3621/8621 for tested lock case, cylinder and security furniture tested all together What is the most secure Euro Lock Standard? The most secure standards for euro cylinders are: SS 312 Diamond – this is considered the highest test that a cylinder can be attack tested to. TS 007 3 star – this has also been attack tested. Sold Secure SS312 Diamond Logo Sold Secure SS312 Diamond Standard 3 Star Kitemark Logo TS007 3 Star Logo Advantages of Euro profile cylinder locks They sometimes have a thumb turn on the inside so exiting the property in an emergency is easy, and can be done without a key. These locks can also be keyed alike to suit (1 key works all locks if required.) Leading manufacturers of Euro locks: Era Yale Asec Evva Union Mul-T-Lock Avocet/ABS Brisant Federal

mortice lock

Lock Standards

There are many standards of locks EN1303, BS3621, BS8621, BS10621, TS007 & 3-star, Kitemark, PAS3621, SS312 Diamond.

What do these lock standards mean? What minimum requirement your insurance requires? Whether to go for a higher security standard for peace of mind.

Lock Sizes

There are many different sizes of locks, fitting an incorrectly sized euro cylinder can lead to lock snapping.

mortice lock

House and Home – Door Locks & Keys

If you need a locksmith for your home, a locksmith approved by SheffLOCK can help. Have your lost your house keys or locked out the house a locksmith can open your locks quickly. We are Emergency Locksmiths offering a 24 hour call out service to help urgently with door and lock opening, lost house keys, changing and repairing locks.

mortice lock

Business Security

To keep your business safe a locksmith can install access control systems, CCTV systems and alarms, security bars & grilles. Find a locksmith to help improve your business security. All SheffLOCK locksmiths are vetted with Criminal Records Check via the Disclosure and Barring Service We are inspected with regular inspections. SheffLOCK are fully qualified passing nationally accepted qualifications.

mortice lock

A Locksmith Can Help You With

Emergency Locksmith

( Out of hours & 24 hour ). Should you be locked out your home or apartment during the normal ‘out of hours’ period. As emergency locksmiths we offer a 24-hour call out can help with opening locked doors & replacing lost keys. As Emergency locksmiths, we can also help with burglary repairs and changing locks.

mortice lock

Door & Window Locks

A popular service of locksmithing is to supply and fit Door and Window locks (UPVC), SheffLOCK can fit replacement locks, change and also repair faulty or damaged locks.

SheffLOCK can also give home security advice such as replacing any locks with anti-snap locks or upgrading your locks to BS3621 standard to meet insurance requirements.

mortice lock

Security Upgrades

As well as locks and keys, SheffLOCK approved locksmiths can advise on improving security for your home and business. They can supply and fit alarms, CCTV systems, master key systems, security grilles, gates and shutters. Call our friendly SheffLOCK locksmiths to talk about your enquiry.

0114 4426200

SheffLOCK Ltd
Unit 6 Niagara Works
Niagara Road
South Yorkshire.
S6 1LU
Call: (0114) 44 262 00
Kevin, Chris & Richard

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