When it comes to securing your home, every small detail matters. Modern uPVC windows and doors already provide excellent insulation and durability, but even the strongest frames can have weak points if not properly reinforced. That’s where sash jammers come in — a simple, affordable device that adds an extra layer of protection against forced entry.
In this post, we’ll explain what a sash jammer is, how it works, and why every homeowner should consider fitting them for peace of mind and improved home security.
What Is a Sash Jammer?
A sash jammer is a small yet sturdy piece of hardware that attaches to the frame of a uPVC window or door. Its purpose is simple: to prevent the window or door from being opened — even if the locking mechanism is bypassed.
It consists of a pivoting arm that can be turned to secure the sash (the opening part of the window or door) firmly against the frame. When engaged, the jammer creates an additional physical barrier that makes it extremely difficult for intruders to force the window or door open from the outside.
👉 You can explore high-quality sash jammers for uPVC windows and doors here on HomeSecureShop.
💡 Expert Insight: Why Locksmiths Recommend Sash Jammers
Even though sash jammers are often marketed as add-ons, they’re increasingly being recommended by locksmiths and security experts as a cost-effective upgrade that complements your main locking system. According to a guide by UK locksmiths, sash jammers are “a quick & inexpensive way to improve your home security” and can be fitted to doors or windows to prevent them from being opened if a thief bypasses the primary lock. (locksmiths.co.uk) They create a physical barrier between the sash (or door leaf) and the frame, making it far harder for intruders to lever open the unit — particularly useful on ground floor or easily reachable windows and doors. Many modern sash jammers are reversible (suiting left- or right-handed openings) and require just minimal drilling for installation, making them a practical and powerful “second line” defence.
Why uPVC Windows and Doors Benefit from Sash Jammers
While uPVC units are known for their strength, the locking systems in older or cheaper models can sometimes be vulnerable to lock snapping or levering attacks. Installing sash jammers can significantly reduce these risks by:
-
Adding reinforcement: They hold the frame securely in place even if the main lock is compromised.
-
Preventing leverage attacks: A common burglary tactic involves prying between the frame and sash — a jammer makes this almost impossible.
-
Acting as a visual deterrent: Seeing visible jammers on your doors and windows can discourage opportunistic thieves.
Even if you already have multipoint locks installed, sash jammers provide redundant security — a crucial principle in home protection.
👉 Add an extra layer of protection to your home with these reliable sash jammer security locks
Easy Installation and Low Cost
One of the best things about sash jammers is how quick and inexpensive they are to install. A DIY-minded homeowner can fit them in under an hour with just a few basic tools. For larger doors or windows, professionals recommend using two jammers — one at the top and one at the bottom — for optimal strength.
Despite their low price (often under £10 each), they deliver significant improvements in resistance against break-ins.
For a trusted option, check out HomeSecure’s sash jammer collection for uPVC windows and doors.
Peace of Mind That’s Priceless
Installing sash jammers is one of the simplest, most effective upgrades you can make to improve your home’s security. They complement your existing locks and hardware, giving you the reassurance that your family and belongings are better protected — day and night.
A small investment in these devices can make a big difference when it comes to deterring criminals and safeguarding your property.
Final Thoughts
If you own uPVC windows or doors, sash jammers are a must-have security addition. They’re affordable, easy to install, and proven to strengthen your home’s defences against forced entry. Combine them with high-security locks and proper maintenance, and you’ll enjoy peace of mind knowing your home is well-protected.
📚 Featured Collections in This Article
Check out the full Sash Jammers Collection at Home Secure™, where you can browse a range of high-performance security options.
You’ll find products that go beyond sash jammers — like lever locks, letterbox guards, and window restrictors — all engineered to improve the safety of your windows and doors.
Whether you’re focused on deterring intruders, making your home child- and pet-safe, or reinforcing your weaker access points, this collection covers it all with reliable, easy-to-install solutions.
