Greenteq uPVC Window Restrictor Stainless Steel Concealed Child Safety Catch Lock

Greenteq uPVC Window Restrictor – Stainless Steel Concealed Child Safety Lock

Keep your little ones safe with window security that limits opening to just 100mm – the perfect balance between ventilation and child protection.

The Greenteq uPVC Window Restrictor provides parents and homeowners with genuine peace of mind by preventing windows from opening beyond a safe 100mm gap. Engineered with a spring-loaded stainless steel arm and innovative autolatch mechanism, this concealed restrictor delivers reliable child safety without compromising your window's appearance or ventilation capabilities.

Manufactured from high-grade stainless steel for lasting durability and corrosion resistance, this restrictor is specifically designed for easy retrofitting to existing uPVC windows. Available in both left and right-handed configurations with three adjustable stud heights (9.5mm, 11.5mm & 14.5mm), it offers compatibility across different window profiles and installation requirements.

Key Benefits:

• Critical 100mm Safety Restriction – Limits window opening to a safe 100mm gap, preventing young children from falling through whilst maintaining essential ventilation for fresh air circulation and condensation control.
• Autolatch Mechanism – Spring loaded arm automatically engages when the window opens, providing consistent child safety protection without requiring manual locking every time you open the window.
• Premium Stainless Steel Construction – Manufactured from high-quality stainless steel that resists corrosion, maintains strength over years of use, and withstands the demanding conditions of regular window operation.
• Discreet Concealed Design – Compact, low-profile installation keeps safety hardware hidden from view, maintaining your window's clean aesthetic whilst delivering robust security performance.
• Retrofit-Friendly Installation – Specifically engineered for easy fitting to existing uPVC windows without requiring specialist tools or major modifications, making professional child safety accessible for DIY homeowners.
• Stud Heights – Three height options to choose from (9.5mm, 11.5mm & 14.5mm) ensure perfect compatibility .
• Left or Right-Hand Configuration – Available in both orientations to suit any window opening direction, providing flexible installation options for every room in your home.
• Quick-Release Functionality – Spring-loaded arm can be easily disengaged when required for cleaning, maintenance, or emergency egress, giving you control when adults need unrestricted window access.
• Complete Fixing Kit Included – Supplied with all necessary screws for immediate installation, eliminating additional trips to the hardware store and enabling same-day safety upgrades.
• Cost-Effective Child Protection – Provides robust window safety at a fraction of the cost of replacement restrictors or new windows, making essential child security accessible for every family budget.

Measuring Instructions – Getting the Right Fit:

Before You Order:

Measure the clearance (gap depth) between your window sash and the window frame when the window is closed. This measurement determines which striker post height you'll need:

• 9.5mm Striker Post Height: For shallow frame profiles with minimal clearance
• 11.5mm Striker Post Height: For standard uPVC window frames (most common)
• 14.5mm Striker Post Height: For deeper frame profiles with greater clearance

How to Measure Correctly:

1. Close your window sash, leave a small gap for measuring
2. Locate the friction stay hinge groove (the channel where your existing window hinge sits)
3. Measure the depth from the bottom of this groove to the edge of the window sash
4. Select the striker post height that will sit slightly recessed when installed

⚠ Important: The striker post must not protrude above the window sash ,as this will prevent the window from closing properly and could damage the restrictor arm.

Product Specifications:

• Brand: Greenteq
• Material: Stainless Steel
• Window Compatibility: uPVC Windows (Side Hung & Top Hung)
• Opening Restriction: 100mm Maximum
• Mechanism Type: Autolatch with Spring-Loaded Releasable Arm
• Available Orientations: Left-Handed or Right-Handed Opening
• Stud Heights: 9.5mm, 11.5mm & 14.5mm
• Restrictor Pivot to Stud Post Centre: 63mm
• Restrictor Base Plate Length: 50mm
• Restrictor Base Plate Width: 16mm
• Restrictor Base Plate Screw Centres: 34mm
• Stud Base Plate Length: 40.5mm
• Stud Base Plate Width: 15mm
• Installation Type: Retrofit-Friendly Surface Mount
• Finish: Natural Stainless Steel

Pro Tips:

Pro Tip: When installing multiple restrictors throughout your home, mark the restrictor location on the window frame before drilling to ensure consistent positioning across all windows. Install at a height that's comfortable for adult operation but out of reach of young children. Test the 100mm restriction before fully tightening all screws to confirm proper engagement – the window should stop firmly at the safe opening distance without excessive force.

Package Contents:

• 1 × Greenteq Window Restrictor Arm Assembly (Stainless Steel)
• 1 × Striker Post with Base Plate (9.5mm, 11.5mm or 14.5mm as selected)
• 1 × Complete Set of Fixing Screws

Step-by-Step Installation Instructions:

Understanding Your Restrictor:

This restrictor is designed with automatic child safety operation. The spring-loaded arm automatically restricts your window opening distance when engaged. You can manually release it for full window access (for cleaning exterior glass), and it will automatically re-engage once the window is closed and reopened. Suitable for both side-hung and top-hung uPVC window configurations.

Tools You'll Need:

• Pencil or marker for positioning marks
• Electric drill with appropriate drill bit for uPVC
• Screwdriver (Phillips or Pozidrive depending on supplied screws)
• Tape measure or ruler

Installation Process:

Step 1: Determine Optimal Positioning

The restrictor assembly must be positioned to limit the window opening to your desired safe distance (maximum 100mm). Important positioning principle: Installing the restrictor closer to the friction stay hinge will allow a wider opening; positioning it further away reduces the opening distance. For maximum child safety, position the restrictor further from the hinge.

Step 2: Install the Restrictor Arm Assembly

1. Open your window to the desired maximum opening position (100mm for optimal child safety)
2. Locate the same groove on the window sash where your friction stay hinge is installed
3. Position the restrictor arm assembly in this groove at your chosen location
4. Mark the fixing screw holes with a pencil
5. Drill pilot holes (if required for your window material)
6. Secure the arm assembly into position using the fasteners supplied
7. Ensure the assembly is firmly fixed and doesn't move when tested

Step 3: Install the Striker Post

1. Select the appropriate striker post height (9.5mm, 11.5mm or 14.5mm) based on your earlier measurements
2. Locate the striker post on the window Frame (the fix part of the window) in the same groove as the friction stay hinge channel
3. Position it so the restrictor arm hook will engage with it when the window closes
4. Mark the fixing screw holes with a pencil
5. CRITICAL CHECK: Before drilling, verify that the supplied screws are not too long – on some windows, screws that are too long could penetrate through and hit the glass, causing damage
6. Drill pilot holes carefully
7. Secure the striker post into position with the fasteners supplied

Step 4: Test the Installation

1. Close the window completely
2. Reopen the window slowly and check that the restrictor arm hook automatically engages with the striker post
3. Verify the window stops at your desired safe opening distance
4. Test the manual release function to ensure you can disengage the arm for full opening when required
5. Close and reopen several times to confirm the autolatch mechanism engages reliably every time

✓ Safety Check Complete: Your window restrictor should now limit opening to your chosen safe distance whilst allowing you to manually release it when needed. The mechanism should automatically re-engage each time you close and reopen the window.

Troubleshooting Common Issues:

• Arm doesn't engage striker post: Check striker post height is correct and positioned in line with arm assembly
• Window won't close fully: Striker post may be protruding too far – use a shorter height spacer
• Restrictor feels loose: Tighten fixing screws further, ensuring they're secured into solid material
• Opening distance too wide/narrow: Reposition the arm assembly closer to or further from the hinge as needed

Frequently Asked Questions:

Will this restrictor work with my tilt and turn windows?
This restrictor is designed for standard side-opening casement windows and top-hung windows on uPVC frames. It's not suitable for tilt and turn mechanisms, sliding sash windows, or bottom-hung opening styles. If you have casement windows that open outwards or inwards on side hinges, or top-hung windows that open outwards from the top, this restrictor will provide excellent child safety protection.

Can I still open the window fully for cleaning?
Yes, absolutely. The spring-loaded arm can be manually disengaged when you need unrestricted window access for external glass cleaning, maintenance, or emergency situations. Simply release the arm from its engaged position, and the window opens normally. The autolatch re-engages automatically when you close and reopen the window – you don't need to reset it manually.

Is this restrictor insurance-compliant for child safety?
This restrictor limits window opening to 100mm, which aligns with recommended child safety guidelines for upper-floor windows. However, specific insurance requirements vary by provider and property type. We recommend checking your policy details or contacting your insurer to confirm compliance with their particular standards.

Will the stainless steel corrode or discolour over time?
No. Genuine stainless steel construction provides excellent corrosion resistance, even in humid bathroom or kitchen environments. The material maintains its structural integrity and appearance through years of regular use, making this restrictor a long-term investment in your family's safety rather than a temporary solution requiring frequent replacement.

Why Choose the Greenteq Window Restrictor?

Child safety shouldn't be complicated or expensive. The Greenteq Window Restrictor delivers professional-grade protection with refreshingly straightforward installation and operation. Parents trust Greenteq's reputation for reliable uPVC hardware that works consistently day after day, year after year. The autolatch design means your windows are always protected – there's no risk of forgetting to engage a manual lock in the morning rush. Combined with premium stainless steel construction and retrofit-friendly design, this restrictor offers the rare combination of robust safety performance, lasting durability, and installation simplicity that busy families