Solarlux bifolds vs other well-known bifolds - what’s the difference?20. February 2020

A boost of natural light and seamlessly linking the home and garden. These are just a few of the reasons bifold doors have been so popular throughout the country for well over a decade. The expansive feeling that comes with bi-folding doors has also been known to increase a home’s value. As with any home investment, there’s a vast amount of information to pick through to find the ideal product for you. So how do Solarlux’s bifold doors compare to other well-known brands in the UK?

Solarlux Bi-Folding Doors









  Well-known UK brand Solarlux
Thermal efficiency up to 1.2 W/m²K up to 0.8 W/m²K
Sightline up to 110mm up to 99mm

RAL colours

Dual colour option

Woodgrain finishes

RAL colours

DB colours

Eloxal colours

Dual colour option

Specialty surface finishes (such as matt, gloss or Tiger)

PAS 24

PAS 24


Secured by Design



Thermal efficiency


The most commonly used measurement of thermal efficiency in bifold doors is U-value. This measures a bifold door’s thermal transmittance and its unit of measurement is W/m²K. The lower the value, the better a product is at retaining heat. Bifold doors from a well-known brand in the UK can achieve a U-value of up to 1.2 W/m²K, whereas Solarlux bifold doors, such as the Highline model, can achieve a U-value as low as 0.8 W/m²K.


The profile of our bifold door holds the key to its thermal efficiency. A multi-functional thermal break does more than just keep your home a comfortable temperature. This expertly crafted feature houses the locking mechanism and gives the door strength, allowing you to move panels weighing more than 17 stone (110 kg) with a little more than a gentle push.


Well-known UK brand: up to 1.2 W/m²K

Solarlux: up to 0.8 W/m²K


Opening and sightlines


“Sightline” is a term that will come up repeatedly when comparing the best bifold doors available on the market. A sightline is the gap between the 2 panes of glass in the door. The slimmer the sightline, the more light that is allowed into the room. One of the UK’s well-known bifold door brand can offer a sightline of 110mm.


Our doors, such as the Ecoline model, offer a sightline of 99mm, giving you practically unobstructed views of the outside world. Solarlux bifold door panels can also be folded into a slender bundle when open. Customise the door to your home by choosing the number of glass panels, the door’s folding direction (left or right) and even if they open in or out. 


Well-known UK brand: up to 110mm

Solarlux: up to 99mm




Despite the slim sightlines, you can rest easy knowing that you’re protected by the Solarlux bifold doors. Our multi-point locking mechanism is concealed within the door’s frame, offering the home high levels of security. Bifold doors from a well-known UK brand meet the UK minimum security standard, PAS 24.


Not only do Solarlux bifold doors meet PAS 24 but they are also compliant with RC2, the European security testing standard. Select products from the range are certified by Secured by Design (SBD). The SBD initiative started in the late 1980s, calling for stricter regulations and testing standards. Since its inception, there has been an 87% reduction in overall burglary in new homes.


Well-known UK brand: PAS 24

Solarlux: PAS 24, RC2, Secured by Design




A well-known UK bifold manufacturer offers an array of colour options such as choosing from 150 RAL colours. Solarlux believes in putting the power in your hands by offering full creative freedom, giving you the perfect opportunity to inject your individuality or match your home to its surroundings.


Our dual colour option allows you to pick one colour to match the exterior of your home and a different one to complement its interior. The colour is applied to the door in our in-house coating plant, which is one of the most advanced in Europe, to ensure a perfect finish.


Well-known UK brand: RAL colours, Dual colour option, Woodgrain finishes

Solarlux: RAL colours, DB colours, Eloxal colours, Dual colour option, Specialty surface finishes (such as Tiger, matt or gloss)



We use high-quality aluminium and wood in our range of bifold doors. The wood featured in our bifold door range, such as the Combiline door, is certified to be sourced from sustainable forestry by the PEFC and FSC. Our environmentally conscious approach extends to the production process with the use of water-based finishes and the recycling of water and heat to conserve natural resources.


Aluminium is inherently a durable and sustainable material, making it perfect for use in bifold doors. Our aluminium production process is certified in accordance with the German A.U.F. Recycling Loop, which confirms our commitment to sustainability and that our aluminium is recycled in an environmentally conscious manner.




Protruding floor tracks can be a trip hazard for little ones and can affect a home’s accessibility. Our bifold doors can come with a completely flush floor track, suitable for any living space. We offer impact protected floor track LED lighting that not only adds an ambience to a room but can act as an orientation aid for the visually impaired.


Award-winning Solarlux bifold doors


Solarlux is proud to have received numerous international awards for our bifold door range, including a 2019 German Design Award for our Woodline bi-folding door. For more information about our bifold doors or any of our other premium home improvement products, contact us online.

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Solarlux Systems Limited
5 Quadrant Park
Welwyn Garden City,

Tel: +44 1707 339970



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