Bi-folding doors
Solarlux Ecoline Bi-folding door
The bi-folding door
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Solarlux started with an idea when two ambitious entrepreneurs, Heinz Theo Ebbert and Herbert Holtgreife, created the concept for the world’s first modern bi-folding door system - sketched on a beermat.

Within a couple of years their idea of a folding glass wall for balconies became a reality. Moving forward, this idea transcended traditional norms for living by creating a versatile glazing solution for large openings like nothing ever seen before and together with their slender profiles, create smooth transitions between inside and outside.

Consistency and tradition is key to any businesses success and today, Solarlux is run by a new generation Herbert’s son, Stefan and the company has over 1000 employees worldwide.

For 40 years Solarlux has stood for outstanding quality, design, materials and manufacturing. Our bi-folding door offers a smooth transition between the inside and the outside, with generous glass fronts that can be opened across almost 100% of their area, the bi-folding door lends living spaces a unique ambience. Unlike traditional sliding doors, which can leave a large section of the opening covered by glass even when fully open, the individual elements of the bi-folding door gather up into a slender bundle of panels to one side – thus guaranteeing unrestricted views.

Solarlux offers choice of both insulated and non-insulated bi-folds, wood or aluminium in a choice of 30 RAL colours as standard and dual colour, various configurations opening inside or outside, opening to the left and/or the right, even round corners and finally a selection of floor tracks including suitability for accessible living. Our aluminium range can also have a coating applied for special climate requirements such as coastal weather protection.

Bi-folding doors suitable for main entry to property and wintergarden glazed extensions - Thermally insulated:

Ecoline   Aluminium/up to 3 m high
Highline  Aluminium/up to 3.5 m high
Megaline  Aluminium/up to 4.5 m high
Woodline  Wood
Combiline  Wood & Aluminium 
SL 97  Wood & Aluminium - Passive Haus potential

Bi-folding doors suitable vertical glazing under glass canopies and intrenal partitions – Non-insulated:

SL 35  Aluminium
SL 45  Aluminium
SL 45 Flexa Aluminium


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The Ecoline & Highline bi-folding doors are PAS 24:2016 certificated

Window and door regulations for new builds: With the desire for slimmer and slimmer aluminium door profiles, security may be compromised. Any windows and doors for new builds, as part of DOC Q Building regulations, must have a security standard that has been shown to be tested to meet the PAS 24 security standards.

What does PAS 24 stand for? PAS 24 is a British minimum standard which means there are no higher or lower grades, so it either passes or fails: PAS 24:2016 Enhanced security performance requirements for doorsets and windows in the UK. The product is tested by an independent ‘United Kingdom Accreditation Service (UKAS)’ body to ensure compliance and fit for purpose.

As well as winning many design awards, the Ecoline & Highline bi-folding doors are PAS 24:2016 certificated and Secured by Design (SBD) accredited which is the UK official police security initiative that works to improve the security of buildings and their immediate surroundings to provide safe places to live, work, shop and visit. Don’t settle for anything less than a quality product.

Versatile bi-folding doors

Order now: The bi-folding door e-brochure
Would you like even more in-depth information on our individual systems and the technical details of our bi-folding doors? Then order our comprehensive digital brochure now and get inspired. If you would like a brochure posted to you, request a quote or send a message, please complete our contact form in the main menu and footer.
benefits at a glance
Maximale Öffnung
Maximale Öffnung
Really open up your space
Blend inside and outside into one
Range of floor track variants
Ein Highlight
Ein Highlight
99 mm sight line
Thermal insulation
Perfect profiles for thermal and sound insulation
Burglar resistance RC2/RC2N
Water tightness
Up to 9A
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Find out about pleated blinds for Solarlux Bi-folding doors


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Our materials

Our Products


Thermally insulated




Thermally insulated


Thermally insulated


Thermally insulated