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Frequently Asked Questions

Does Lockdown come with an extension foot?
No, Lockdown is the taller model so it doesn't require extensions.
Do I need to use the provided spacers?
No, the spacers can improve performance but DoorJammer was designed and tested without them.
If my door is fitted with a draft excluder or a rubber kickstrip, will DoorJammer still work?
Yes, as long as the strip does not prevent DoorJammer fitting under the door. Crushing or damage to the strip could occur, however.
Does DoorJammer work as effectively if I extend the foot all the way out?
Yes, DoorJammer's PAS24 certificate was issued at full extension. You can see it in action in the video here.
Can I use DoorJammer to keep a door open instead?
Yes, DoorJammer works just as well!
What is the minimum and maximum under-door gap for DoorJammer?
You will need a minimum of 3mm to fit DoorJammer. The maximum gap for DoorJammer is approximately 33mm and for Lockdown, it's 42mm.
Will DoorJammer prevent Fire or Police services getting in during an emergency?
We demonstrated DoorJammer to fire service professionals who agreed it would not prevent them from breaching a door by its hinges. UK Police liked it so much we're a preferred product through Secured By Design.
Can I take my DoorJammer onboard a plane in overhead luggage?
Yes, DoorJammer is TSA-friendly, compact and lightweight.
How does DoorJammer work on carpet?
When fitted firmly, DoorJammer should remain in place, however the extension foot provided has a special grip that helps for very thick carpets.
Does DoorJammer fit to a uPVC door?
DoorJammer requires a minimum 3mm gap under a door to fit - most uPVC doors do not have this gap.
How much does Lockdown or DoorJammer weigh?
DoorJammer only weighs a little more than a mobile phone at just 210g / 0.46lbs and Lockdown is 810g / 1.78lbs.
I'd love a DoorJammer in my favourite colour, do you sell any others?
Sorry! DoorJammer and Lockdown are both painted in highly-visible Classic Red.
How thick is DoorJammer's extension foot?
The foot will extend DoorJammer by 11mm.
What materials are used to make DoorJammer?
We only use high-grade steel to achieve DoorJammer's incredible strength. Smaller parts and accessories are rubber and plastic.
Can I fit DoorJammer to my door permanently?
We do not recommend this. DoorJammer is designed with a quick-release function for safety and portability.
Can I buy DoorJammer for use on outward swinging doors?
No, currently outswinging doors are not compatible with DoorJammer.
Do you have distributors and can I apply to be one?
Yes, we do accept a limited amount of distributors - apply by emailing us at sales@door-jammer.co.uk.