Aluminium bifold doors
Bring the Outside In
Award-winning bifold doors ideal for any home
Bespoke bifold door configurations available
Sunflex-trained and supported installers located nationwide
For more than 35 years SUNFLEX has led the way in the global design and manufacturing of industry-leading aluminium bifold doors.
With the enhanced requirements of Building Regulations, the SUNFLEX SF75eco offers the ideal combination of advanced thermal performance and stunning appearance. When stacked back the doors allow you to bring the outside in, creating completely unobstructed openings to connect your home and garden. When closed the advanced design and attention to detail help keep your home warm and the worst of the weather outside, out.
The SF75eco is manufactured with slender aluminium frames, featuring a patented 44mm thermal break, and is packed full of unique features not found on any other folding door on the market.
Like every SUNFLEX UK door, the SF75eco is handmade in a SUNFLEX factory, ensuring consistent manufacturing quality and genuine components throughout.
Designed to be the most thermally-efficient bifold door, the SF75eco offers Passivhaus standard thermal performance and is specifically manufactured to accommodate a triple glazed sealed unit, and thanks to its advanced thermal break technology it can achieve an incredibly low U-value from just 0.8W/m²K† (based on a centre-pane of 0.5W/m²K) whilst maintaining the same usability and slender appearance that SUNFLEX UK doors are renowned for.
Every SUNFLEX product is manufactured to strict standards of child safety. The SF75eco features an exclusive antiSLAM panel catch and finger cushioning gasket. Unlike typical magnet designs, the SUNFLEX Panel catch completely secures the lead door in place preventing the doors from being blown shut by the gusts of wind or from being operated by small children.
|U-Value Triple Glazed||
From 0.8 W/m²K†
With centre pane of 0.5W/m²K
|U-Value Double Glazed||
From 1.3 W/m²K†
With centre pane of 1.0W/m²K
|Maximum panel width||1200mm|
|Maximum panel height||3000mm|
|Secured by Design™||Yes|
|Water tightness||To 900Pa (Class 9a)*|
|Air permeability||To 600Pa (Class 4)*|
|Wind load||To 2000Pa (Class 5B)|
|Unique Locking panel catch||Yes|
|Track options||2 – low-threshold or weathered track|
|Double rebated frames||Yes|
* Water tightness and air permeability test performance is dependent upon a number of factors including system track option, system configuration and panel sizes.
† Thermal performance is dependent on glass specification.
Our SUNFLEX bifold doors are available with a choice of two threshold options.
Our single rebated low threshold is ideal for creating a level transition between your home and patio or decking, featuring a 14mm upstand that is classed as an accessible threshold and meets the requirements of Building Regulations M.
Our double rebated weathered threshold features a 35mm upstand against the frames of the doors seal, providing the most comprehensive weather performance. Available with or without a sill.
Low threshold trackno sill
Weathered trackwith sill
All of our aluminium doors and windows are manufactured to the highest standards of performance and finishes with unrivalled attention to detail, including a premium powder coat finish which is cured on to the frames of the doors and more scratch-resistent and hardwaring than traditional liquid paint coatings.
For the perfect finish we have chosen a selection of the most popular colours for each system to hold in stock. In addition to our standard colours you can personalise your doors with a choice of more than 200 bespoke RAL colours.
Aluminium is the perfect material for manufacturing bifold doors. It is strong and stable yet relatively lightweight, enabling us to create doors with slim frames that are maintenance-free.
To request a quote for a set of aluminium bi-folding doors, or any of our specialist door systems, use our postcode checker to find the nearest SUNFLEX distributor in your area.
Contact your local distributor to enquire about our products and to request a quote.
We will work with them to supply the products you require and they will install them in your home.
If you are in the glazing trade join our distributor programme today and you’ll receive discounts on select showroom models, the choice of over 40 products for your inventory, and training and technical support directly from SUNFLEX UK.Join