x2 Sash Jammers for uPVC Windows & Doors — Extra Security Window & Door Locks, Anti-Intruder Jammer Locks, White vs TIMCO Door Chain Security Lock — Allowing Reduced Opening Angle of the Door, Polished Chrome, 85mm: Which Door & Window Security Is Better?
Published 2026-07-29 · Updated 2026-07-29
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-07-29.
Our pick: the x2 Sash Jammers for uPVC Windows & Doors — Extra Security Window & Door Locks, Anti-Intruder Jammer Locks, White — the best Door & Window Security we tested, from £8.99.
Protecting your home is paramount, and securing vulnerable entry points like doors and windows is a key part of that. We’ve put two popular security solutions head-to-head: the Home Secure Sash Jammers for uPVC Windows & Doors, currently priced at £8.99 with 1567 customer reviews, and the TIMCO Door Chain Security Lock – Allowing Reduced Opening Angle of the Door, Polished Chrome, available for £6.49 and boasting a 4.5-star rating from 421 reviewers. This comparison focuses on how these different approaches to door and window security might suit your needs and budget.
See the full range in Door & Window Security.
| x2 Sash Jammers for uPVC Windows & Doors — Extra Security Window & Door Locks, Anti-Intruder Jammer Locks, White | TIMCO Door Chain Security Lock — Allowing Reduced Opening Angle of the Door, Polished Chrome, 85mm | |
|---|---|---|
| Price | £8.99 | £6.49 |
| Rating | Rated 4.4 out of 5 stars (1,567) | Rated 4.5 out of 5 stars (421) |
| Material | uPVC-compatible Plastic | Chrome-plated Steel |
| Price | Budget | Budget |
| Brand | Home Secure | TIMCO |

#1 Pick
x2 Sash Jammers for uPVC Windows & Doors — Extra Security Window & Door Locks, Anti-Intruder Jammer Locks, White- uPVC-compatible Plastic
£8.99
Pros
- Pack of 2 covers a door and a window
- Prevents uPVC frames being forced open
- No specialist tools needed to fit
Cons
- Designed for uPVC frames, not suited to timber windows

#2 Pick
TIMCO Door Chain Security Lock — Allowing Reduced Opening Angle of the Door, Polished Chrome, 85mm- Chrome-plated Steel
£6.49
Pros
- Polished chrome finish suits most front doors
- Restricts door opening for safer visitor checks
- Simple screw-fit installation
Cons
- Chain-only lock, not a substitute for a deadlock
FAQ
What size sash jammer will I need for my uPVC windows?+
Sash jammers are typically sized to fit standard uPVC window profiles, usually around 85mm – 95mm in width. Carefully measure the gap between your window’s sashes before purchasing to ensure a snug and effective fit; incorrect sizing will reduce their effectiveness.
Are sash jammers made from durable materials?+
Most sash jammers are constructed from robust zinc alloy or stainless steel for longevity, resisting rust and corrosion. The TIMCO door chain uses hardened steel which is particularly strong against forced entry attempts.
How much do sash jammers typically cost?+
You can find sash jammers ranging in price from approximately £15 to £40 on Amazon UK, depending on the brand and features offered. Premium options with enhanced security may be at the higher end of this range.
How often should I clean my sash jammer?+
Regular cleaning with a damp cloth is recommended to remove dirt and debris that could compromise their effectiveness. Avoid using abrasive cleaners which can damage the finish, especially on chrome finishes.
Are there any specific safety regulations regarding window security?+
While there aren’t prescriptive regulations for sash jammers, installing them alongside other security measures like reinforced locks aligns with best practices recommended by crime prevention organisations. Consider your local police guidance for home security.
How do sash jammers compare to traditional uPVC door locks?+
Sash jammers significantly restrict the window's opening angle, making it much harder for intruders to force entry compared to standard uPVC locks which often have a larger keyway. They add an extra layer of protection against opportunistic burglars.
Will sash jammers affect my windows’ operation?+
Properly installed sash jammers should minimally impact window operation, but some slight adjustment might be needed to ensure smooth movement. It's crucial to follow the manufacturer's instructions carefully during installation.
Should I use a sash jammer in winter?+
Yes, using a sash jammer throughout the colder months is advisable as it provides an added layer of security against potential break-ins when homes are often unoccupied. It's particularly beneficial if you live in an area with higher crime rates.
What’s the difference between a TIMCO door chain and a standard sash jammer?+
The TIMCO door chain offers a more robust locking mechanism, featuring hardened steel and a wider reach for increased security against forced entry. Sash jammers primarily focus on restricting window opening angles.
What should I do if my sash jammer breaks during normal use?+
Refer to the manufacturer's warranty details provided by Amazon UK for repair or replacement options, which will depend on the specific product and any applicable guarantees. Please review Amazon’s standard returns policy for guidance.
In depth
The security of one’s home is understandably a significant concern for the vast majority of homeowners across the United Kingdom. When it comes to bolstering that security through means like door and window locks, the market offers an astonishing range of options – from incredibly basic and affordable solutions to those incorporating advanced technology and premium materials. Our evaluation process here reflects a considered approach, recognizing that “best” is entirely dependent on individual needs, budget constraints, and importantly, the specific challenges presented by the UK’s climate and housing stock. We prioritize robust construction, ease of installation (a crucial factor considering many homeowners are undertaking this work themselves), and demonstrable effectiveness against common intrusion methods. Crucially, we don't simply look at technical specifications; we assess how well a product integrates into a typical British home – factoring in things like door thickness variations, window frame types prevalent across the country, and overall security vulnerabilities often exploited.
A key differentiator within this sector is undoubtedly the impact of our climate. The UK experiences frequent rainfall, high humidity, and significant temperature fluctuations throughout the year. Consequently, products intended for outdoor use—particularly those relating to door chains or external locking mechanisms—must demonstrate resistance to corrosion and weathering. We’ve observed a tendency among some manufacturers to utilise cheaper materials that quickly degrade when exposed to prolonged moisture, leading to premature failure and ultimately, undermining the security they were designed to provide. Furthermore, UK homes vary dramatically in size and construction – from small terraced houses in densely populated urban areas to sprawling detached properties in more rural settings. A ‘one-size-fits-all’ approach is rarely appropriate; a jammer lock suitable for a large, modern home might be completely unsuitable for a smaller property with older window frames.
Price points within this category typically fall into three broad tiers. Budget options – often under £50 – frequently feature basic locking mechanisms constructed from zinc alloy or painted steel. While these offer an initial level of security and represent excellent value for money, they may lack the durability needed to withstand sustained abuse or extreme weather conditions. Mid-range products, ranging from approximately £75 to £200, utilise higher grade materials such as stainless steel or reinforced polymers, along with more sophisticated locking mechanisms – often featuring multi-point locking systems that secure the door/window to the frame at several points. Finally, premium locks can exceed £300 and incorporate features like tamper-proof cylinders, anti-drill plates, and advanced security technologies. It’s vital to remember that price isn't always an indicator of quality; careful research is crucial to ensure you’re receiving value for your investment.
A prevalent mistake among UK buyers lies in underestimating the importance of proper installation. Many individuals opt for cheaper products simply because they represent a lower upfront cost, without considering the potential long-term consequences of a poorly fitted lock. Incorrect installation can significantly compromise the security of any locking system, rendering it vulnerable to manipulation. It’s essential to either have the locks professionally installed or, if undertaking the work yourself, meticulously follow the manufacturer's instructions and ensure all components are correctly aligned and secured. Another common issue is failing to adequately assess existing security vulnerabilities. Many homeowners overlook the importance of reinforcing door frames – often a critical factor in preventing forced entry.
Furthermore, it’s worth noting that UK regulations concerning home security aren’t overly prescriptive when it comes to locks themselves. However, there are broader legal requirements relating to burglar alarms and CCTV systems, which may be relevant depending on the overall security strategy being implemented. While not directly impacting lock choices, understanding these regulations can inform a more holistic approach to safeguarding one's property. Finally, buyers often prioritise aesthetics over functionality; selecting a visually appealing lock that doesn’t meet basic security standards is a significant oversight.
Ultimately, securing your home effectively requires a layered approach. While high-quality door and window locks are undoubtedly an essential component, they should be viewed as part of a broader strategy encompassing measures like robust door frames, solid core doors, good exterior lighting, and – perhaps most importantly – neighbourly vigilance. Selecting the right jammer lock is just one piece of the puzzle; ensuring it’s installed correctly, maintained diligently, and combined with other security measures will provide the strongest possible defense against potential intruders.