Securistyle Defender Restricted Window Friction Hinge (Side Hung)

(Choice of length, stack height, and handedness)

Built-In Safety, Built to Last

The Securistyle Defender Restricted Side-Hung Friction Hinge is built to maximise safety and reliability in residential settings. Available in 12" and 16" lengths with 13 mm or 17 mm stack heights, and in both left- and right-hand versions, it fits most side-hung PVC-u windows. Tested to BS EN 13126-5, the restrictor meets Building Regulations Part K by limiting openings to 100 mm where fall heights exceed 600 mm, reducing the risk of accidents in homes, apartments, and multi-occupancy buildings. A quick-release lever allows full sash opening for cleaning or ventilation, with the restrictor automatically re-engaging when closed.

For lasting performance, the Defender Restricted hinge incorporates a robust cam friction device, asymmetric location system for consistent closure, and an enclosed end cap with vent arm for improved weather sealing (BS 6375-1). Its slot-hole-slot fixing enables secure, adjustable installation into PVC-u reinforcement. Cycle tested 30,000 times, corrosion tested to 96 hours, and both Secured by Design approved and BBA certified, it ensures safe, smooth operation for years to come.

Features & Benefits

Building Regulations Part K compliant – restricts openings to 100 mm where fall heights exceed 600 mm (BS EN 13126-5 tested)
Built-in restricted opening – helps prevent accidental falls for residential safety
Automatic re-engagement – restrictor resets when the window is closed
Quick release lever – allows the sash to open fully for cleaning or maximum ventilation
Asymmetric location system – ensures accurate closure and alignment every time
Robust cam friction device – prevents friction screw misuse and ensures consistent performance
Improved weather sealing – extended enclosed end cap and vent arm design (tested to BS 6375-1)
Durable slot-hole-slot fixing – ensures secure fixing into PVC-u reinforcement and allows easy adjustment
Proven long-term performance – endurance tested to 30,000 cycles, corrosion tested to 96 hrs, Secured by Design approved, and BBA certified

Did you know? Roughly 4,000 children are injured each year from falls out of windows. Installing a restricted friction hinge helps prevent these accidents while still allowing safe ventilation and easy cleaning access.

Friction Hinges

Yale Defender Egress Friction Hinge

Securistyle Defender Standard Window Friction Hinge (Side Hung)

Securistyle Restricted Window Friction Hinge (Side Hung)

Securistyle Defender Standard Window Friction Hinge (Top Hung)

Securistyle Restricted Window Friction Hinge (Top Hung)