Open up the back of your house in style
Aluminium is the right material for the big doors. Stronger and slimmer than uPVC, with sightlines narrow enough that the doors almost disappear when open. Bifolds, sliders, Crittall-style, or the new slide-and-swing — there's an option that fits.
ALUMINIUM BIFOLDS, SLIDERS & MORE
TRUSTED PARTNERS & ACCREDITATIONS
WHY ALUMINIUM
The right material for big door openings.
Bifolds and sliders need to be strong and slim — two things uPVC struggles with. Aluminium does both effortlessly.
Slim Sightlines
Frames from 25mm wide. More glass, more light, less plastic in your view of the garden.
Genuinely Secure
Multi-point locking, anti-jacking technology, and frames that won't be forced. Built to take it.
Any RAL Colour
Powder coating lets you pick literally any colour, single or dual (different inside/outside).
Decades of Life
Aluminium doesn't sag, swell, or yellow. Roughly twice the lifespan of uPVC equivalents.
FOUR OPTIONS
Which door type fits your project?
Each does something different — and what looks great in one home can feel wrong in another. Here's how to pick.
BIFOLD DOORS
SMARTS VISOFOLD 1000
The classic open-up.
Bifolds fold back like a concertina, so 90% of the opening is clear when fully open. The right choice when you want to genuinely connect inside and outside on warmer days, or when you regularly entertain.
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Range of opening configurations— choose how many panels and which side they stack to
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Versatile 2- to 7-panel options to suit different opening widths
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Slim aluminium profiles with thermally broken frames
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Best for— opening up a whole wall onto a garden or patio; entertainers
SLIDING PATIO DOORS
SMARTS VISOGLIDE PLUS
The minimal-view option.
Big glass that slides out of the way — no panels stacked outside.
Sliding patio doors are the pick when you want the view to feel uninterrupted even when the door is closed. The panels slide past each other rather than folding outward — neater when there's less space around the opening.
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Available in double or triple track for wider openings
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Smooth-glide mechanism with steel reinforcement
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Better daily usability than bifolds — easier to crack open just one panel
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Best for — homes where the door stays closed most of the time and the view matters; minimal-look modern designs
ULTRA-SLIM SLIDERS
CORTIZO COR VISION
The architectural statement.
When you want the glass to look like there's no frame at all.
The Cor Vision Plus is for architect-led projects where the slim Visoglide isn't slim enough. Only 25mm visible sections where the panels meet — about as close as you can get to a frameless slider while keeping proper thermal performance.
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Just 25mm visible sections at the meeting point — the slimmest you'll find
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Spans openings up to 4 metres wide
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Minimalist, ultra-modern look for contemporary builds
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Best for — architect-designed extensions, modern new builds, anywhere the door is meant to be invisible
SLIDE AND SWING
NEW WAVE
The best-of-both option.
"Doors that do what bifolds don't."
New Wave slide-and-swing doors solve the everyday usability problem with bifolds — they slide for normal use, but each panel can also swing open as a regular door. So you don't have to fold the whole lot back just to step into the garden.
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Slide as standard, swing on demand— best of both worlds
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Each panel acts as an individual door when needed
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Useful daily, dramatic when fully open
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Best for— families who'd find bifolds annoying day-to-day but still want the option to open up wide
SINGLE & FRENCH DOORS
SMARTS ALITHERM
The traditional door — in aluminium.
Two variants: Alitherm 400 for modern, Heritage for Crittall-style.
If you're not opening up the whole wall — just replacing a back door or French doors — the Smarts Alitherm range gives you that aluminium look without going to a bifold or slider. Designed to complement the matching window range so everything sits together visually.
Alitherm 400
Modern square profiles to match the Alitherm 400 windows. Single doors or French pairs.
Alitherm Heritage
Crittall-style steel-look replacement, complementing the Heritage window range. The right pick for period restorations.
HARDWARE
Add a touch of elegance.
The standard handle does the job. If you want to take it up a notch, the upgrade range covers everything from understated modern to period-style cast handles.
COLOURS
Standard finishes — or any RAL
Black, Anthracite Grey and White are the popular standard picks. Beyond those, Smarts also offer curated colour collections — and full RAL bespoke if you want something specific to match the rest of the property.
