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uPVC window security


What makes uPVC windows secure?

When researching and comparing uPVC windows, look out for PAS 24: 2016 and Secured By Design standards. For the best uPVC window security, consider a Secured By Design locking mechanism, hinge-side security brackets and internal beading.

uPVC window security

Alongside doors, windows are a vulnerable point of entry to your home for intruders. 20% of burglars break into a house through the window which makes it essential to have robust window security.


Installing secure uPVC windows that meet accredited standards will help to protect your home from intruders and should be as standard for ground-floor windows.


All new build homes must be fitted with windows that achieve PAS 24: 2016 to be Document Q compliant with Building Regulations. But, older homes and windows might not meet these standards.


When researching and comparing uPVC windows, look out for PAS 24: 2016 and Secured By Design standards.


Keep reading to find out what you should look out for when comparing uPVC windows security.



What makes a uPVC window secure? infographic

What makes a uPVC window secure? infographic

Buy Secured By Design uPVC Windows

Everest uPVC windows offer enhanced window security

uPVC windows security locks

Most insurance companies insist on key-operated locks for ground-floor windows and any home should have them for basic security.


Key lockable handles

Older windows would only have window catches, but these are vulnerable to being easily opened by an intruder. All new window handles are now key-operated as standard with varying degrees of lock quality.


Aside from security, having upper floor windows with key-operated locks is an additional safety feature to stop children from opening windows.


Everest GrabLock and multi-point locking

Everest GrabLock and multi-point locking



GrabLock® uPVC window security lock

GrabLock® has been developed in conjunction with Yale to create an innovative and superior secure lock.


GrabLock® has two aluminium rotating cylinders and GRP metal-reinforced keeps with triple the locking area of a standard multi-point lock. The lock provides security down the full length of the window.


As the window handle is turned the two blades rotate out of the frame and lock into the keeps on the frame, ‘grabbing’ on to them. Once the lock is engaged it can withstand massive amounts of force. In tests, when locked, GrabLock® could lift 600kg which is roughly the weight of a grand piano.


GrabLock® is exclusive to Everest and is featured on our uPVC Casement windows.




Multi-point locking

Some basic window locks have only one or two points of contact leaving them vulnerable to be levered open by an intruder.


A secure uPVC window can have a comprehensive locking system with a multiple number of locking and contact points.


In addition to the locking points, bi-directional locking adds an extra layer of security in the frame that prevents the intruder from being able to lever your window out of place.


Lockable ventilation & night vents

Some windows can be set to a night vent position where the window is locked with a small one-inch gap for ventilation. However, not all windows can be safely left in this position as they can be prised open by an intruder.


Always check that your night vent setting is not vulnerable with exposed catches. Note: night vents do not meet Secured by Design standards.


Security hinges and night vents

Security hinges and night vents



Hinge-side security brackets

Security brackets are tough, interlocking brackets that secure the outside of a window sash on the hinge side of the window when the window is fully closed and locked.


If an intruder tries to lever the window at the hinge side, the brackets prevent the window from being moved out of place.


A window that has hinge brackets in combination with the friction hinges on the top and the bottom and the locking mechanism, means that all four sides of the window are protected.


Everest uPVC windows are fitted with two GRP brackets which reinforce the hinge side of the window.


Stainless Steel Friction Hinge

Friction hinges are designed to fold into the frame of the window.


When the hinge is folded into the frame, the layers of stainless steel sit in a perfect stack with each piece attached with a pivot point at both ends.


This folding prevents them from being tampered with, even if the uPVC in front of it has been broken and the hinge is left exposed.


No part of the hinge can be manipulated with pliers or tampered with. If the hinge is broken whilst trying to force, the hinge is rendered useless and the window is effectively locked closed. If this happens, the entire window sash would need to be removed to gain entrance.


All Everest uPVC casement windows have friction hinges.


Window opening restrictors

An opening restrictor on the frame can limit how far a window can be opened. This is useful not just for security, but also for safety reasons to stop children from falling out of windows.


Internally beaded windows

The glass in a window is held in place by a small strip called a bead. To remove the glass, the bead can easily be peeled away from the frame.


Older uPVC windows had the glazing bead on the exterior of the windows frame which meant a burglar could remove the bead and glass from the window.


Window glazing is held in place against the frame with a small strip called a ‘bead’ which runs along all the edges of the window sash.


Most windows now feature internal glazing beads for security reasons and to make fitting upper-floor windows easier from inside the house without ladders.


All Everest windows are fitted with an internal glazing bead.


The average cost of damages from a break in the UK is £846 and the cost of stolen items £2,856.

Laminated glass

Laminated glass is made by sandwiching a polyvinyl butyral (PVB) layer of thin plastic between two panes of annealed glass and fusing them together.


The unique quality of laminated glass is that if it breaks, the glass is fused to the PVB layer and stays in place.


Laminated glass is useful for additional security on secluded doors and windows to the rear of a property. If the glass is broken by an intruder, it’s difficult to pierce and gain entry because of the PVB layer.


All Everest windows are available with laminated glass as an option.


All statistics quoted are from ONS.

Everest uPVC Windows

Casement Windows →

Everest uPVC casement windows can be fitted with GrabLock, developed with lock experts Yale

uPVC Windows →

Everest uPVC windows meet the British Standard for security and can be fitted with SBD approved GrabLock

Tilt and Turn Windows →

Everest Tilt and Turn windows can be tilted inwards from the bottom hinge for safe ventilation

At Everest, our Windows and Doors are tested to meet British Standards for Security

Our doors and windows go through rigorous testing to meet standards. Our uPVC, composite and aluminium doors meet PAS 24: 2016 and Secured by Design accreditation.

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