External steel doors bi fold


An ultra contemporary design unique to Black Steel, our Steel Bi-Fold Doors give you a strong, secure way to bring the outdoors in. Maximum light, peerless style.

Our signature doors bring a new dimension of modern, industrial-style design and functionality to your home or workspace. Black Steel’s bi-folding doors are built with slimline frames that allow an amazing level of light into the room, while being strong and secure enough to open up an entire exterior wall, merging your interior living space with the outside.


All of our frames are crafted from steel, which is up to three times stronger than aluminium alternatives, giving you doors that are less likely to warp under weight, force or heat. This strength also means we can offer slimmer frames and improved sightlines, maximising light and space without compromising security. Our frames also come powder-coated as standard, to keep your steel pristine.

Our external partitions have some of the slimmest profiles in the industry, refusing to compromise on either strength or elegance.


Bi-fold doors are incredibly versitile, fitting in to your design vision. We offer these frames in a wide range of colours and finishes, so your doors will compliment whatever space you put them in. Download our style examples below to get some ideas to start you off.


Our external doors and windows let in a stunning amount of light from the outside world, but their thermally broken double glazing means that the temperature inside stays just as you want it.

Thermal breaking is a way of insulating your home from the conditions outside. We incorporate a layer of non-thermally conductive material to separate the internal and external facing parts of the frame, keeping them thermally distinct. So whether it’s freezing or sweltering outside, your room will stay the temperature you want it.

Our partitions have achieved a 1-U value, guaranteeing you an unparalled level of insulation.

*Please note that these prices do not represent your final project price; each project demands different needs, and the prices vary by project. These prices range are only a relative idea of prices. Do never assume these prices as a product price. We appreciate your understanding.

** These sizes are only suggestive sizes.


Thermally Broken

Thermally broken frames help to keep the heat where it belongs.

Minimal Energy Loss

Thermally broken frame and double glazing keeps the heat inside.

Slim sight lines

Steel gives 3x the strength of aluminium in thin frames, maximising glass and light.

Double glazing

Double glazing reduces heat loss, keeping your property warm and cost-efficient.


Flexible use
Can be combined with our range of external and internal doors, and partitions, to create a unique look for your space.
We offer a wide range of glazing options to perfectly match your property’s look.
Colours & finishes
In addition to our standard range of colours we can supply the windows or frames finished in any Ral colour. (May incur additional costs.)


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