Keeping your home secure does not always require major changes or expensive equipment. In many properties, the most important improvements start with checking whether the existing doors, windows, locks, and key safes are working correctly.

This home security checklist for Welwyn Garden City homeowners explains what to inspect, which warning signs should not be ignored, and when professional locksmith advice may be needed.

Active Lock Centre has more than 40 years of locksmith experience, helping homeowners improve the security of properties across Welwyn Garden City, Hatfield, St Albans, Stevenage, Hertford, and surrounding Hertfordshire areas.

Start With a Simple Home Security Inspection

Walk around the outside and inside of your property and inspect every possible entry point.

Pay particular attention to:

• Front and back doors
• Side doors and gates
• Patio, French, and bifold doors
• Ground-floor windows
• Accessible upstairs windows
• Garage doors
• Sheds and outbuildings
• Key safes
• Door frames and hinges

Do not only look at the locks. A good lock fitted to a damaged, badly aligned, or weakened door will not provide the protection it should.

Check whether each door closes properly, whether the handles feel secure, and whether the key turns smoothly.

A lock that has suddenly become stiff may be warning you about a door alignment problem or a failing locking mechanism.

Check Your Front and Back Door Locks

Your external doors are the first places to inspect.

Ask yourself:

• Does the door close fully without needing to be pushed?
• Does the handle feel loose or stiff?
• Does the key turn smoothly?
• Does the door need to be lifted before it locks?
• Is the lock fitted securely?
• Does the cylinder stick out beyond the handle?
• Are there visible signs of wear or damage?

If a lock is difficult to use, do not keep forcing it. Continued pressure can damage the key, cylinder, handle, gearbox, or complete locking mechanism.

Active Lock Centre provides professional lock repairs in Welwyn Garden City for wooden, uPVC, composite, aluminium, and commercial doors.

[IMAGE HERE: FRONT DOOR LOCK BEING INSPECTED]

Suggested alt text: Locksmith inspecting front door security in Welwyn Garden City

Check Locks on Wooden Doors

Wooden front and back doors are commonly fitted with mortice locks, night latches, or a combination of both.

Look for the British Standard Kitemark on the faceplate of the lock. Many home insurance policies specify the standard of lock required on external doors, so you should also check the wording of your own policy.

A basic night latch on its own may not provide the same protection as a properly specified British Standard lock.

You can read more about British Standard deadlocks and how they are used on wooden doors.

The condition of the door and frame also matters. Check for:

• Splitting around the lock
• Loose hinges
• Movement in the frame
• Gaps around the door
• Damaged strike plates
• Loose handles or lock furniture

The correct lock must be fitted properly and supported by a sound door and frame.

Check uPVC and Composite Door Security

Most uPVC and composite doors use a multipoint locking mechanism. When the handle is lifted, several hooks, rollers, or bolts should engage along the edge of the door.

To secure this type of door correctly, lift the handle, turn the key, and remove it.

Simply pulling the door closed may only engage the latch. It may not activate the full multipoint locking system.

Check that:

• The handle lifts smoothly
• All locking points engage
• The key turns without excessive pressure
• The door does not need to be lifted
• The cylinder does not protrude excessively
• The door sits correctly within the frame

If the handle has become stiff, loose, or floppy, arrange an inspection before the mechanism fails completely.

Active Lock Centre provides uPVC door and window repairs in Welwyn Garden City, including gearbox replacements, door realignment, handle repairs, and multipoint lock servicing.

Are Your Euro Cylinders Protected Against Lock Snapping?

Many uPVC, composite, aluminium, French, and patio doors use euro profile cylinders.

Older or basic cylinders may not offer enough protection against snapping and other forms of attack.

For improved security, look for recognised third-party testing and approval. Depending on the door and existing hardware, this could include:

• TS007 3-star Kitemarked cylinders
• SS312 Diamond approved cylinders
• TS007 1-star cylinders combined with suitable 2-star security handles

Do not rely only on packaging that says “anti-snap”. Look for recognised approval markings and make sure the cylinder is the correct size for the door.

An incorrectly sized cylinder that sticks out too far can remain vulnerable even if the product itself has security features.

Read more about cylinder snapping and lock security.

Do Not Ignore Door Alignment Problems

A large number of lock failures start with the door becoming misaligned.

Common warning signs include:

• The door catches on the frame
• The handle is becoming harder to lift
• The key is stiff when locking
• The door must be pushed, pulled, or lifted
• Hooks or bolts scrape against the keeps
• The door works differently in hot or cold weather

When a door is out of alignment, the locking mechanism is forced to work under additional pressure. Over time, this can damage the gearbox or other internal components.

Correcting the alignment early may prevent a more expensive lock failure.

Check Windows and Accessible Openings

Ground-floor windows and any windows that can be reached from a flat roof, wall, drainpipe, or garden structure should be checked carefully.

Make sure:

• Window handles operate correctly
• Locks engage properly
• Keys are available but stored safely
• Hinges are not damaged
• Frames close without large gaps
• Opening restrictors are working correctly
• Windows are closed and locked when the property is empty

Do not forget small bathroom, kitchen, garage, or side windows. A small opening may still provide access to a handle, key, or larger window.

Where a window is intended as an emergency escape route, any added security must not prevent safe escape.

Check Patio, French, and Bifold Doors

Rear doors can be overlooked because they are less visible from the road.

Inspect patio, French, and bifold doors for:

• Poor alignment
• Loose handles
• Damaged hinges
• Worn cylinders
• Locking points that do not engage
• Excessive movement between the doors
• Keys left in an accessible position

French and bifold doors rely on several components working together. A fault in one area can prevent the complete door set from locking properly.

Do not wait until the door becomes stuck shut or completely insecure.

Make Sure Your Key Safe Is Secure

Key safes are useful when a neighbour, relative, carer, cleaner, or pet sitter needs access to your home.

However, a weak key safe can undermine the security of the entire property.

Choose a properly tested key safe and have it fixed to a strong surface. A solid wall is normally more suitable than fitting a key safe directly to a door.

Avoid placing it:

• Beside the lock it controls
• In an obvious position at eye level
• On a weak wall or loose brick
• Where tools can easily be used against it
• In a place clearly visible from the road

Keep the access code private and change it when someone no longer needs access.

Read our guide to key safe installation in Welwyn Garden City.

Secured by Design also provides useful guidance on choosing and positioning security products.

Secure Garages, Sheds, Gates, and Outbuildings

Garages and sheds often contain tools, bicycles, gardening equipment, and ladders.

These items are valuable, but tools and ladders could also be used to gain access to the main property.

Check:

• Garage door locks
• Side-door locks
• Padlocks and hasps
• Gate locks
• Shed door hinges
• Tool storage boxes
• Windows in garages and outbuildings

Secure ladders and heavy tools so they cannot easily be removed.

Make sure gates close and lock correctly, particularly if they provide access to the rear of the house.

Keep Keys and Valuables Out of Sight

Avoid leaving house keys, vehicle keys, handbags, wallets, and electronic devices where they can be seen through a window or reached through a letterbox.

Do not label spare keys with your address.

Avoid hiding keys:

• Under doormats
• Inside plant pots
• Beneath bins
• On top of door frames
• Inside unlocked garages or sheds

These hiding places are widely known and provide little meaningful security.

If keys have been lost together with information that identifies your address, consider changing or rekeying the affected locks.

Use Lighting, Alarms, and Cameras Properly

Locks and physical security should form the foundation of your home protection, but lighting, alarms, and cameras can provide additional layers.

Consider:

• Motion-activated external lighting
• Dusk-to-dawn lighting
• A correctly installed alarm system
• Doorbell cameras
• CCTV covering vulnerable areas
• Timer switches for internal lights

Cameras should not be treated as a replacement for effective locks. They may record an incident, but the doors and windows still need to resist entry.

Avoid creating dark hiding places with overgrown bushes, fencing, or stored materials near doors and windows.

Check Your Security Before Going on Holiday

Before leaving your home unoccupied:

• Lock every external door
• Lock accessible windows
• Remove keys from doors
• Check garages and sheds
• Secure side gates
• Test alarms and cameras
• Cancel visible deliveries
• Use timers for lights
• Avoid advertising your absence publicly
• Ask a trusted person to check the property

If someone needs to enter while you are away, make sure any key safe is secure and the access code is only shared with the person who needs it.

Allow enough time to repair stiff doors, damaged windows, or faulty locks before your departure. Leaving these checks until the final day limits the time available to put problems right.

Arrange a Free Home Security Survey

It can be difficult to judge whether every lock is suitable, fitted correctly, and appropriate for the type of door.

Active Lock Centre offers a free home security survey in Welwyn Garden City.

The survey can include checking:

• Front and back door locks
• uPVC and composite door cylinders
• Wooden door locks
• Window security
• Patio and French doors
• Garage door locks
• Key safes
• Door alignment
• Potential security weaknesses

The aim is to identify genuine weaknesses and explain the practical options available. It does not mean every lock needs replacing.

Frequently Asked Questions

How often should I check my home security?

Carry out a basic check at least once a year, before a holiday, after moving home, or whenever a lock, door, or window starts behaving differently.

Should I replace a lock that has become stiff?

Not automatically. A stiff lock may be caused by poor door alignment, a worn key, a damaged cylinder, or a failing mechanism. Have the complete door inspected before replacing parts.

What type of cylinder should I fit to a uPVC door?

The right cylinder depends on the door and security furniture already fitted. TS007 3-star and SS312 Diamond approved cylinders are commonly used for improved resistance to attack.

Should I change the locks when moving house?

Changing or rekeying the external locks gives you control over who has access. You cannot know with certainty how many previous keys are still in circulation.

Do you provide home security surveys in Welwyn Garden City?

Yes. Active Lock Centre provides free home security surveys in Welwyn Garden City and locksmith services across Hatfield, St Albans, Stevenage, Hertford, and surrounding areas.

Home Security Advice From Active Lock Centre

Active Lock Centre is a family-run, MLA Approved locksmith company with more than 40 years of experience.

We provide:

• Lock repairs and replacements
• uPVC and composite door repairs
• Window lock repairs
• Anti-snap lock upgrades
• British Standard lock fitting
• Door alignment and adjustments
• Key safe installation
• Garage door lock repairs
• Emergency locksmith services
• Free home security surveys

For practical home security advice or to arrange a free survey, call Active Lock Centre on 01707 242874.