Doors get most of the attention when it comes to home security, but windows are a significant point of vulnerability — and one that insurance companies are increasingly paying attention to. Ground floor windows, and any window reachable from a flat roof, extension, or adjacent structure, are common entry points for opportunistic burglars. Here's what you need to know.
Do You Need Window Locks?
In short: yes, on accessible windows. Beyond the obvious security benefit, many home insurance policies now specify that key-operated window locks must be fitted on all ground floor windows and any other windows reachable without a ladder. If your policy includes this condition and you make a claim following a break-in through an unprotected window, your insurer may dispute the payout.
Check your policy documents for any mention of window security — look for phrases like "key-operated locks on accessible windows," "ground floor windows must be secured," or references to windows in the security conditions section. If you're unsure, call your insurer and ask directly. Get their answer in writing if it will affect any decisions you make.
Types of Window and Their Lock Options
uPVC Casement Windows
Modern uPVC casement windows (the standard hinged or tilt-and-turn type in most homes built since the 1990s) typically come with espagnolette locking mechanisms — the long strip of locking points that run up the side of the window frame, driven by a handle. These are reasonably secure when in good condition, but the handles themselves are often the weak point — particularly older handles without a key-locking function.
A key-operated handle — one that requires a small window key to open — adds a straightforward extra layer of security. These can usually be retrofitted to existing windows without replacing the mechanism.
For additional security, friction stays (the arms that hold the window open) can be upgraded to lockable versions that prevent the window being pushed fully open from outside even if the handle is compromised.
uPVC Sash Windows
Sliding sash windows in uPVC typically have a simple catch mechanism that can be supplemented with sash stops — small bolts that screw into the frame and physically prevent the sashes from sliding when engaged. These are inexpensive, unobtrusive, and effective.
Timber Sash Windows
Older timber sash windows — common in Victorian and Edwardian properties across parts of Stourbridge, Wollaston, Hagley, and the surrounding villages — often have a basic fitch catch as their only security. These can be slipped open relatively easily. Options for improving security include:
- Sash stops screwed into the meeting rail, preventing the window from being raised
- Key-operated sash locks fitted to the meeting rails
- Dual screws — a bolt that passes through both sashes when they're closed, preventing movement
Period properties often require careful consideration to avoid damaging original timber or affecting the look of the windows, but most of the options above are unobtrusive when properly fitted.
Timber Casement Windows
Older timber casement windows typically close with a simple handle and stay, with no real locking function. Lockable window handles, surface-mounted window locks, and cockspur handle locks are all options for improving security without replacing the window.
Which Windows Should You Prioritise?
Work through them in order of accessibility:
- Ground floor windows — all of them, front, side, and rear
- Windows above a flat roof, extension, or bay — easily reached without a ladder
- Windows adjacent to a fence, wall, or drainpipe — anything that provides a route upward
- Windows overlooked by trees or outbuildings — particularly if they offer concealment as well as access
Upper floor windows that require a ladder and are in full view of the street are a much lower priority — opportunity and concealment are the two things burglars look for, and those windows offer neither.
On leaving windows open: A window locked in the open (ventilation) position is a real challenge. Many window handles can be locked in an open position to allow airflow while preventing the window being pushed fully open. If this is something you need — particularly on ground floor windows overnight in summer — it's worth fitting hardware that makes it possible rather than choosing between ventilation and security.
What About Window Alarms and Sensors?
Window alarm sensors — small magnetic contacts that trigger if the window is opened — are useful as a supplementary deterrent and as part of a wider alarm system. They don't replace good physical locks but add a layer of detection on top of prevention. If you have a monitored or self-monitored alarm system, adding window sensors to accessible windows is worth considering.
Getting Window Locks Fitted in Stourbridge
AMP Lock fits and supplies window locks across Stourbridge, Halesowen, Dudley, Kingswinford, Hagley, Kidderminster, and surrounding areas. Whether you need key-operated handles on your uPVC windows, sash stops on period timber windows, or a general security assessment of the property, call or WhatsApp on 07961 169 681. No call-out fee, and pricing confirmed before we start.