What are the thinnest Bi Fold doors available in 2025?
Bifold doors have become a staple in modern British homes, offering a seamless connection between indoor and outdoor spaces. Their sleek design, combined with practicality, has made them a popular choice for homeowners seeking to maximise natural light and create a contemporary aesthetic. In 2025, the quest for the thinnest framed bifold doors in the UK has taken centre stage, with manufacturers pushing the boundaries of design and engineering.
When it comes to slim-framed bifold doors, the thickness of the frame plays a crucial role in enhancing the overall aesthetic and functionality. Thinner frames mean larger glass panels, allowing more light to flood into a space while providing uninterrupted views. For those prioritising a minimalist look, selecting the slimmest possible frame is essential.
What does the term Sightline mean?
The term sightline refers to the visible width of the frame where the panels of a bifold door meet when closed. In essence, it’s the thickness of the vertical aluminium or timber profile that sits between the glass panes. A slimmer sightline means less frame and more glass, providing a cleaner, more minimalistic look and maximising natural light and uninterrupted views. When comparing bifold doors, the sightline is a key consideration for homeowners seeking a sleek, modern aesthetic.
The following is a comprehensive list of bifold doors available in the UK and the sightline that it delivers.
Siegur Lux Bifold Door - 74mm Sightline
Unifold Bi-Fold Door - 120mm Sightline
| Bifold Door Name | Sightline |
|---|---|
| Sieger Lux by IQ Glass | 74mm |
| Origin OB-36+ Soho and Origin OB-36 Contemporary | 84mm |
| Alumil Smartia MF65 | 88mm |
| Express Bifolds XP88 | 88mm |
| Schuco ASFD75 | 90mm |
| Smart Systems Visofold 6000 | 94mm |
| Aluco Aluminium steel-look bifold | 94mm |
| Solarlux Ecoline and Highline | 99mm |
| Solarlux SL80 | 105mm |
| Alumil SF85 | 105mm |
| Express Bifolds XP Vision (Alumil SF85) | 105mm |
| aïr 900 bifold door | 107mm |
| Glideline GB49 | 110mm |
| Cortizo Bifold Plus | 110mm |
| Origin OB-49 Bifolding Door | 110mm |
| Greenways Ultra Slim Bifolding Door | 110mm |
| Schuco ASS 80FD | 112mm |
| Sunflex SF75 | 115mm |
| Stellar Aluminium Systems Bifolding Door | 117mm |
| Comar FSDX Folding Sliding Door | 120mm |
| Schuco ASS 70 FD | 120mm |
| Cortizo Bifolding Door | 120mm |
| Unifold by Arkay Windows | 120mm |
| StudioGlide by Eurocell (DeWall product) | 120mm |
| Deceuninck Decalu88 folding doors | 120mm |
| Air 800 Bifolding Door | 122mm |
| AluK Luminia F82 Bifold Door | 122mm |
| Smart Systems Visofold 1000 Slim | 122mm |
| Reynaers CF 77 SL | 122mm |
| Senior Architectural Alifold Doors | 123mm |
| Senior Architectural PUReFold Doors | 123mm |
| Sunparadise Supertherm 80 Bifolding Door | 124mm |
| Sunparadise Thermo 60 Bifolding Door | 124mm |
| Stayfix Architectural Vision Fold Doors | 125mm |
| Folding Sliding Door Company FD72 | 130mm |
| Velfac 860 Bifolding Door | 130mm |
| Reynaers CF68 | 131mm |
| SAPA Crown Folding Door with slim sash | 131mm |
| Smart Systems Visofold 1000 | 132mm |
| Korniche Bifold Doors by Made for Trade | 133mm |
| Exlabesa Xlafold Bifolding Door | 135mm |
| Centor C1 Bifolding Door | 136mm |
| Sheerline Prestige Bifold Door | 138mm |
| AluK Optio BSF70 Folding Sliding Door | 140mm |
| Sieger Bifolding Door | 140mm |
| Smart Systems Visofold 2000 | 141mm |
| Metal Technology Bifolding Door | 143mm |
| Technal Ambial Bifolding Door | 143mm |
| Reynaers CF77 | 144mm |
| Panoramic Slide and Turn Door | 145mm |
| Kawneer AA3720 Bifolding Door | 145mm |
| Stellar Aluminium Systems Bifolding Door | 146mm |
| Kestrel Folding Sliding Door | 150mm |
| Metal Technology System 26 HI+ Bifolding Door | 153mm |
| Origin OB-72 Bifolding Door | 154mm |
| Smart Systems Visofold 3000 | 154mm |
| Alumina by Liniar | 156mm |
| Warmcore Bifolding Doors | 156mm |
| Solarlux SL70 | 157mm |
| SAPA Crown Folding Door standard sash | 165mm |
| Aluprof MB System Bifolding Door | 166mm |
| Smart Systems Visofold 4000 | 185mm |
Price of slim framed Bi Fold Doors
Unfortunately, slimmer-framed bifold doors tend to cost more due to the advanced engineering and higher-grade materials required to achieve their sleek appearance without compromising strength or durability. These doors often utilise premium aluminium or other robust yet lightweight materials, allowing for thinner profiles that maximise glass area and provide a more contemporary aesthetic. Additionally, the manufacturing process is more intricate, involving precision work to ensure structural integrity and smooth operation. While the cost is higher, the result is a modern, stylish feature that enhances natural light and adds value to any property.
Please contact us if you would like more information about the bifold door systems mentioned or have any questions about bifold doors. Ideal Glass regulary install a range of Bi-Fold Doors in St Albans, Harpenden, Hertfordshire, Bedfordshire, Buckinghamshire & London areas.
