The UK Guide to Window and Door Restrictors

Window and door restrictors are essential safety devices for homes and businesses. These small additions limit how far windows and doors can open and serve as protection against falls whilst allowing you to keep spaces airy during the warmer summer months. 

For UK homeowners, understanding when and how to install these devices is not just about peace of mind and a cooling breeze; it's also about compliance with building regulations and ensuring the safety of your family.

This guide will help you navigate the world of door and window restrictors (for external and internal use), from understanding requirements to choosing the right products for your specific needs.

Understanding Patio Doors vs French Doors

Before diving into restrictors, it's essential to understand the key differences between patio doors and French doors, as this determines the type of restrictors you'll need.

French Doors

French doors have a traditional ‘French’ design featuring multiple glass panes separated by glazing bars, creating a classic, elegant appearance. They operate on hinges and typically open inward or outward, with both doors opening simultaneously. The distinctive feature is their appearance and the way they divide the glass into smaller sections, often with decorative glazing bars.

These doors are typically taller than they are wide, making them ideal for creating a sense of grandeur in period properties or homes seeking a classic aesthetic.

Patio Doors

Patio doors, on the other hand, are a broader category that includes sliding doors and bifold doors. The most common type is the sliding patio door, which operates on tracks and slides horizontally rather than swinging open.

These doors often focus on larger glass areas with minimal frames, creating a contemporary appearance that maximises natural light and views to the garden. Their operation makes them particularly popular in modern homes where internal space is at a premium and there is limited space for doors to swing in or out.

Why This Matters for Restrictors

The type of door you have will determine which restrictors you'll need. French doors require restrictors that work with hinged mechanisms, whilst sliding patio doors need restrictors designed for sliding track systems. You also need to consider the size and weight of the door.

Legal Requirements and Building Regulations

In the UK, window and door restrictors for internal and external doors are governed by specific regulations that vary depending on the type of building and its use. Understanding these requirements is crucial for DIY or professional installation.

When Are Restrictors Legally Required?

Window restrictors are legally required in buildings where ‘at-risk individuals’, such as children or those needing care, can access a window. Restrictors limit window openings to 100 mm or less, helping to prevent falls and injuries.

This requirement covers educational establishments, particularly those for children, as well as care homes and hospitals. Buildings housing vulnerable individuals and high-rise residential buildings above certain floors must also install appropriate restrictors to prevent falls and injuries.

The 100mm Rule

The restrictor opens to a maximum of 100mm or a maximum opening of 89mm to prevent the passage of an infant child per regulation BS EN 131265 : 2011+ A1 : 2014.

This standard is based on extensive research into child safety and prevents a child from passing through the opening, whilst still allowing adequate ventilation and emergency escape routes.

Building Regulations Compliance

When installing restrictors, you must ensure compliance with Part K for protection from falling, collision and impact, Part B for fire safety to ensure escape routes aren't compromised, Part F for ventilation requirements, and Part L for conservation of fuel and power.

Choosing the Right Restrictors for Different Applications

Windows

Window restrictors come in various forms, each suited to different window types and situations:

Casement Windows

For standard casement windows, cable restrictors are the most popular choice. These allow the window to open to a safe distance whilst maintaining the option for full opening when needed for cleaning or emergency escape.

Sliding Windows

Sliding windows require restrictors that work with the horizontal sliding mechanism. These typically involve stops or locks that prevent the window from sliding beyond a safe opening width.

Sash Windows

Traditional sash windows need specialised restrictors that work with the vertical sliding mechanism while preserving the window's appearance.

Doors

Door restrictors serve different purposes but follow similar safety principles:

French Doors

French doors require restrictors that work with hinged mechanisms. Options include:

• Door chains with safety catches
• Hinged restrictors that limit the opening angle
• Cable restrictors for glass-heavy doors

The weight and swing pattern of French doors means the restrictor must be robust enough to handle the door's momentum whilst providing reliable stopping power.

Sliding Patio Doors

Sliding patio doors need restrictors that work with the track system:

• Track stops that prevent over-sliding
• Locking mechanisms at specific opening widths
• Security stops when the door is partially open

These mechanisms allow for ventilation whilst maintaining home security, with the restrictor fitting seamlessly within the door's sliding operation.

Bifold Doors

Bifold doors require specialised restrictors that work with the folding mechanism whilst maintaining the door's functionality.

Room-Specific Considerations

Different rooms have different requirements. For example, if you have young children, restrictors can provide peace of mind and ensure you don’t have to worry about falls out of windows or other accidents.

For children’s bedrooms, restrictors should be robust and ideally only removable with tools. Whereas in common areas and living rooms, you should aim for a balance between safety and functionality. These restrictors should allow for cleaning access and emergency escape.

Permanent vs Non-Permanent Restrictors: The Critical Balance

Another key decision is the choice between permanent and non-permanent restrictors.

Permanent Restrictors

Permanent restrictors offer maximum security as they cannot be easily removed by children, providing protection and robust construction. However, they limit access for cleaning, may complicate emergency escape or fire safety, and may require professional installation.

Non-permanent restrictors provide flexibility for cleaning and maintenance, with easy removal for emergency escape. They're user-friendly for adults and often more cost-effective, though they can be removed by older children, can be forgotten or left disabled by accident, and are less robust than permanent options.

Child Safety vs Fire Safety: The Critical Balance

This is one of the most important questions in choosing restrictors. The key is finding solutions that protect your loved ones whilst maintaining adequate emergency escape routes. To do this you will need to consider:

Fire Safety Considerations

All restrictors must allow for quick release in emergencies, with some featuring key-operated release mechanisms. You should consider the mobility of all household members and ensure escape routes remain viable under stress conditions.

Recommended Approach

1. Use permanent restrictors in high-risk areas (children's bedrooms, upper floors)
2. Use easily removable restrictors in the main living areas
3. Ensure all adult family members understand how to use restrictors 
4. Consider routes and plans in an emergency

By being thoughtful, you can ensure your family benefits from the benefits of window and door restrictors without compromising on emergency safety or lifestyle.

Installation and Maintenance

When it comes to installation, most restrictors can be installed by DIYers. However, you will need to consider several factors, including:

• Following the manufacturer's instructions precisely
• Using appropriate fixings for your frame material
• Testing the operation before final installation
• Ensuring proper adjustment for a safe opening distance

Professional Installation

Alternatively, you could pay a professional to install complex or expensive door systems. This is especially relevant for areas such as schools that need to adhere to strict building regulations and practices. You may also want to hire a professional when mistakes could compromise safety, when structural modifications are needed, or for properties with specific accessibility requirements.

Maintenance Requirements

Maintenance is just as important as installation. So when you install restrictors, make sure to plan for checks and any potential replacements you may need. This routine maintenance ensures continued protection and compliance with safety standards.

Product Selection and Quality

Another top tip when choosing restrictors is to look for CE marking and compliance with British Standards, alongside material durability such as stainless steel, brass, or quality plastics. Consider ease of use for all family members, compatibility with your specific doors and windows, and weather resistance for external-facing door and window restrictors.

Shop Door and Window Restrictors with GB DIY

Window and door restrictors are essential safety devices that, when properly installed, can prevent serious accidents whilst maintaining your home’s functionality. The key is understanding your specific needs, legal requirements, and the critical balance between safety and accessibility.

For UK DIYers, this means carefully considering not just the immediate safety benefits but also the long-term implications for your home's functionality and compliance with building regulations. 

Whether you choose permanent or non-permanent solutions, the most important factor is ensuring that your chosen restrictors are appropriate for your specific situation and are properly maintained over time.

Remember, the goal is not just to install restrictors, but to create a safety system that protects your family while allowing your home to function effectively. For more information on specific products and installation guidance, visit GB DIY Store, where you'll find our comprehensive range of door restrictors and window restrictors suitable for all types of UK homes.