CERO Ultra-Slim Profile Sliding Doors by Solarlux of Germany

If there is a better ultra slim-profile sliding door than CERO we have yet to see it!

It's also the slimmest with a profile of just 34mm and can be double or triple glazed. Either way, it slides beautifully every time.

CERO is an ultra-slim profile all-glass system of frameless-style sliding glass doors and fixed panels that can create double or triple glazed panels up to 15m² or 1000kg each.

Engineered for super-sized solutions while still maintaining small profiles.

The perfect finishing touch for your Grand Design!

With its large-scale glazing options (up to 6m tall or wide per panel), CERO is best suited for openings of 3m or more. 


We believe that CERO is the finest slim-profile door in the world. Yes, there are cheaper systems, but nothing can match it in terms of performance, build-quality, finish and style.

If you are looking for a product that exceeds your expectations in every way, then this is it.

This luxury german product is engineered so that it can be used for extra large doors, which means it is ultra strong with heavy-duty runners and fittings, even if your doors aren't extra large.

CERO achieves exceptional levels of thermal efficiency with class-leading Uw values as low as 0.79 (depending on chosen specification). Class 4 air impermeability, water tightness 9A, sound reduction 43+ dB.

PAS 24 Enhanced Security logoSecurity
Cero is certified to the rigourous European burglar-resistance standard RC2. Cero II also has PAS 24 and both meet Part Q requirements for security.

To fully appreciate the quality of the finish, you really need to come and see it at our showroom. But believe us when we say it is stunning, a real show-stopper. Our showroom Cero is anodised silver, but it also looks great in anthracite grey or any other of the many finishes available.


The CERO won an Iconic Award (Best of Best), the prestigious iF Gold Award ... not to mention winning a German Design Award in the category 'Building and Elements'.Cero award logos


Versatility and Limitless Design Opportunities

Typically as a Solarlux brand, CERO is highly versatile with limitless design possibilities, guaranteeing precision, intelligent technical details, continuous development and technical support. CERO enables doors of up to 15m² surface area, allowing for ceiling-high glazing and is the ultimate glazing option to maximise visible light transmission without compromising on ventilation or views. Triple track doors available.

Open Corners (aka "movable" or "all-glass" corners)

With unrestricted design choice through combinations of fixed and sliding elements and open corner solutions, we can provide endless bespoke solutions for doorways and apertures.


Door profiles are almost entirely amalgamated within the CERO frame using brush seals and sealing lips. The flush integration of the window frame in the wall, ceiling and ground provides a seamless appearance between all facades. The filigree profiles enhance the slim and delicate design for maximum visual appearance and transparency.

Redefine your Vision

CERO glass panels open up rooms and perspectives for designers and architects. CERO technology has the ability to redefine your vision.

Download a CERO brochure

Cero - up to 15m2 per panlel - (max 6m high or 4m wide)

Project Galleries with Cero Slim-Profile Sliding Doors

We have installed hundreds of Cero slim-profile sliding doors in recent years and these galleries show a few of them. There are more on our amazing Project Galleries page along with other products.

Why Solarlux?

Fully Manufactured in Germany
All Solarlux products sold by Spectrum are fully manufactured in Melle, Germany, including doors, frame, glass, handles and fittings. Each door is bespoke-made to your size and specification.

High Performance
Solarlux doors are precision-engineered to a class-leading standard. They are independently tested to 1200PA (approximately 100 mph) and remain water-tight beyond that. The SL80 has been tested to failure at 3000Pa (a typical tropical hurricane is about 2400Pa).

Thermal Insulation
All Solarlux doors are thermally broken on the whole system, including the threshold, and they developed the famous "bionic turtle" thermal break system. The class-leading U-values are provided on the whole unit, not just the door panels, so that you know exactly what you are getting. U-values range from 1.4 with double glazing down to 0.79 with triple glazing and the best specification.

Security is taken very seriously at Solarlux, and all products are certified to the rigorous European RC2 standard as a minimum. Some products, such as Ecoline, Highline and SL60,  also have Secure by Design, a British standard created by the Association of Chief Police Officers.

Some manufacturers require you to provide evidence of a rigorous maintenance regime to qualify for the warranty. Spectrum provide a no-quibble Solarlux-backed warranty. As one of the elite Solarlux 'Quality Partners', we are also able to provide an enhanced warranty over a standard dealer.

You obviously expect your doors to slide effortlessly when they are first installed — but you also want them to be equally effortless 10 years later. The stresses on a slim-profile or bifolding door are considerable — and only doors engineered to such a high standard will last the distance. Solarlux doors are tested to 20,000 cycles — the equivalent to opening twice a day, every day for 27 years!

Passive House
The Solarlux SL97, a timber-aluminium bifolding door, has a U-value down to 0.79 and meets the standard for Passive House installations.



To describe the Solarlux Campus in Melle, Germany, as outstanding would be an understatement! In recent years it has won all kinds of prizes such as the Lower Saxony State Prize for Architecture and the 2019 Environmental Award issued by the Osnabrück Regional Conservation Fund. However, even without these awards, the 58,000 m² facility would still have plenty to impress: workstations flooded with light, a huge 3,000 sq.m. showroom, one of Europe’s largest geothermal areas... the list is endless!

The Main Entrance to the Solarlux Campus in Melle- Germany


We'll do everything we can to make your project our best yet!

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