In the UK, the regulations surrounding window blinds are governed by the British and European safety standard BS EN 13120.

​Te UK legal framework focuses strictly on enforced layout, mandatory height limits, and safety devices.

​These regulations apply universally to all homes and public spaces (schools, rentals, offices), regardless of whether children currently live there. If a DIYer is modifying, repairing, or installing window coverings, they need to know these exact technical limits to ensure the installation remains compliant.

​1. The 1.5-Metre Minimum Height Rule

 

​The most critical measurement under BS EN 13120 is the 1.5-metre (approx. 5 feet) floor clearance.

• ​Continuous Loops (Chains or Cords): The bottom of any looped pull chain (like on a roller blind) or operating cord must hang at least 150cm (1.5m) off the floor.

• ​The Chain Tidy Requirement: The loop cannot hang loose or swing freely. It must be permanently held completely taut against the wall or window frame using a fixed safety device (a "chain tidy" or "tensioner").

​2. Rules for Blind Cord/Chain Lengths

​If you are repairing or replacing the chains on older blinds, the length you are legally allowed to cut the chain depends on whether you know the overall installation height (the distance from the top of the blind to the floor).

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​Scenario A: The Installation Height is UNKNOWN

​If you don't know exactly how high up the window frame sits from the floor, you must adhere to standard factory default maximums:

• ​Standard Cords/Chains: The operating loop must be restricted to a maximum length of 100cm (1 metre) if the overall blind drop is less than 2.5 metres.

• ​Accumulation: If the blind drop is greater than 2.5 metres, the cord length can be calculated as the overall drop minus 150cm.

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​Scenario B: The Installation Height is KNOWN

​If you know the exact distance from the floor to the top of the blind, you can make the chain longer for ease of use, provided the bottom of that chain strictly terminates no lower than 150cm from the floor.

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​3. Mandatory Safety Mechanisms for DIY Repairs

​If a DIYer is servicing a corded blind system rather than replacing it with a cordless alternative, BS EN 13120 dictates that one of three mechanical safeguards must be integrated into the loop or lift system:

 

• Chain-Break Connectors ("Easy-Break" Clips): These are small plastic inline connectors built into a beaded chain loop. If a load of more than 6kg (approx. 13 lbs) is applied to the loop, the connector is designed to split apart instantly, breaking the loop so a child cannot strangle. (Note: If an easy-break connector is used, the chain clearance from the floor can safely be reduced to 60cm).

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• ​Cord Consolidators: For standard venetian or pleated blinds that feature multiple internal lift strings, a consolidator must be used to merge those strings into a single pull cord before they leave the headrail casing. This prevents a child from getting entangled between individual strings.

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• ​Fixed Safety Cleats: For any blind utilizing a standard pull string, a heavy-duty cleat must be fixed to the wall at a minimum height of 150cm from the floor. The spare string must be wound tightly in a figure-of-eight pattern around the cleat every single time the blind is opened.

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​4. Landlord & Rental Property

 

Implications

​It is vital to warn landlords that the law treats non-compliant blinds as a serious hazard.

​Under the General Product Safety Regulations 2005, landlords have a legal duty of care to ensure all fixtures are safe. If a tenant moves into a property with legacy, free-hanging looped blinds that lack tensioners or cleats, the landlord can be held legally liable for negligence if an accident occurs. Any maintenance check or repair on a rental property should mandate upgrading to cordless or installing compliant safety retrofits.

 

​5. Further Advice 

​ The "Make It Safe" campaign guidelines established by the British Blind and Shutter Association (BBSA): www.makeitsafe.org.uk

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• ​Furniture Placement: Explicitly warn readers to move cots, beds, playpens, highchairs, and sofas away from windows. Toddlers climb, meaning a cord safely mounted 1.5m off the ground can still be reached if a sofa sits directly underneath the window.

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