Aluminium Security Door
An aluminium security door is a lockable metal gate built to fit over an existing external door — reinforcing a vulnerable entrance without replacing the door itself. It’s not a solid replacement door; it’s a barred barrier that sits in front of one, adding an independent lock and a physical deterrent to a back door, side entrance or communal doorway. Every security door we build is made to your exact doorframe, hand-built in the UK, and finished in undercoat or any RAL colour. Call 02089116000 for a free quote, or read on for how it works.
How an Aluminium Security Door Gate Works
The gate is built from a box-section frame with welded infill bars, hung on hinges fixed to the doorframe or the brickwork immediately around it. It closes over your existing door — wooden, glazed or composite — and locks independently of whatever lock is already fitted to that door. The result is two separate barriers at one entrance: your existing door, and a metal gate in front of it that has to be opened or forced separately. It can be hung to open inward or outward depending on which side of the doorway has room to swing.
Locks and Specification
We offer a full range of locking options for security door gates, including a simple latch and padlock, a mortice lock with two keys, a box-section lock kit with handles and a euro cylinder supplied with three keys, an ornamental gate lock, a deadlock, and a hook lock. Frames are built from box-section aluminium with bars welded directly to the frame, sized to your doorframe rather than supplied as a standard stock size — most UK external doorways fall within a fairly narrow range of widths and heights, but we measure and build to your opening rather than assume. It’s worth being clear about what this product is: a physical barrier and visible deterrent added to an existing door, not a certified replacement doorset in its own right.
Where Aluminium Security Doors Are Used
These gates are commonly fitted to rear and side doors, utility room entrances, communal doors on shared buildings, shop and retail back doors, and holiday let side entrances where an extra layer of security gives both owner and guest peace of mind. If you’re a landlord or managing a rented property, it’s worth checking with the property owner or freeholder before fixing anything to a shared or leased doorframe. For securing a side passage rather than a doorway itself, our aluminium side gates are built for exactly that job, and for a shared alley serving several properties, our aluminium alleyway gates cover communal access more broadly.
Why Aluminium for a Security Door
External doors take the worst of the weather, and a security gate fitted over one is exposed to wind-driven rain on every side. Aluminium’s natural resistance to rust means the frame and bars stay sound regardless of how exposed the doorway is, and its light weight keeps the gate easy to operate on hinges that get used daily. A powder-coated finish keeps its colour and needs nothing more than an occasional wipe down.
Made to Your Doorframe
Send us the width and height of your doorframe, measured on the inside of the frame itself, along with which side you’d like the hinges and which way you need the gate to open. We’ll confirm the finished size and lock options before manufacturing your gate.
Nationwide Delivery and Installation
We manufacture and install aluminium security door gates across the UK. For a free, no-obligation quote, call 0208 911 6000.
Frequently Asked Questions
What type of locking system is fitted as standard on an aluminium security door?
Our aluminium security doors are designed to accept multi-point locking systems, which secure the door at several points along the frame rather than a single latch. We discuss your locking requirements during the order process to ensure the door is prepared for the lock type you need.
Can an aluminium security door be fitted with a vision panel or mesh without weakening it?
Yes. Vision panels and mesh options can be incorporated into the door design while retaining the structural strength of the aluminium frame. The panel or mesh is fitted within the door construction, so you can have light or visibility without compromising the door's resistance to forced entry.
How does an aluminium security door compare to a steel one for security?
Aluminium is a strong alternative to steel, though it is generally more expensive and slightly less strong. For a security door, aluminium offers a good balance of durability and lighter weight, which can make everyday use and fitting easier, while still providing a robust barrier when paired with a multi-point locking system.
Can the door be made to fit my existing door opening, including the threshold and frame?
Yes. Each door is customised to the exact height and width of your opening. We discuss exact measurements and tolerances with each customer before production to ensure a precise fit, including how the frame and threshold will sit within your existing opening.
Which way can an aluminium security door be hung?
Our doors can be hung on either side to suit your requirements. We confirm the handing and swing direction with you before production so the door works correctly with your hinge and lock positions.
Can an aluminium security door be used for a rear or side entrance as well as a front door?
Yes. The same made-to-measure construction applies to front, side, or rear entrances. The door is built to the opening size and security requirements of the specific location, so a side or rear entrance can be given the same level of forced-entry resistance as a front door.
Does the aluminium frame require a steel reinforcement for security?
Depending on the door size and security level required, some designs can incorporate additional reinforcement within the aluminium frame or stiles. We can advise on the best construction for your specific door size and locking arrangement when you discuss your requirements with us.
What maintenance does an aluminium security door need?
Clean the door with a cloth or sponge and soapy water. Lubricate hinges and the locking mechanism periodically to keep them working smoothly. Aluminium is naturally corrosion-resistant, which reduces the need for additional treatment compared to other materials.
Can an aluminium security door accept additional locking like a deadbolt or night latch?
Yes. The door can be prepared for additional locking points such as a deadbolt or night latch alongside the multi-point locking system. We confirm your full locking specification before production so the door is machined correctly for the hardware you plan to use.
How long does it take to make a made-to-measure aluminium security door?
Typically 2–4 weeks from order confirmation, depending on the specification and finish. After placing your order, we produce a drawing for your approval before moving into production.
