Is Our Sunflex SF75ECO The Most Thermally Efficent Aluminium Bifold Door Available In The UK?
With its patented 44mm thermal break and outstanding design, the SF75eco is the most thermally efficient aluminium bifold door on the market today. When triple-glazed, the system can achieve an overall (frame plus glass) U-value of just 0.8W/m²K, making it suitable for even Passivhaus standard homes.
Specifically designed to offer the best in thermal efficiency and extremely low U-Value, providing the lowest in CO2 emissions associated with reduced energy consumption and considerable savings in heating bills.
Sleak & Slender Aluminium Frames
The challenge for architects has been incorporating bifolding doors that don’t just perform well but also actually look good in the finished design, and the SF75eco achieves that. With slender 117mm sightlines and panels up to 1.2m wide and 3.0m high, the doors maximise the glass area when closed and provide a seamless connection between inside and out when open.
Key Design Features
The SF75eco has been designed in Germany by SUNFLEX, utilising more than 35 years of folding door design. The system includes several innovative design features, including the patented panel catch and stacking clip technology that prevent the doors from being blown shut in the wind and the finger-safe gasket design that keeps little fingers safe as the doors are closed.
Award Winning Bifold Door For the Homes of South Wales
We believe in bringing world-class home improvements to the people of Wales. As the trusted local distributor of award-winning Sunflex Bifold Doors, we supply and install our innovative bifolding doors across South and West Wales, from Cardiff to St Davids, and Swansea to Aberystwyth.
The Specification
SF75 eco
Bi-Fold Door-
117mm sightline
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75mm frame depth
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From 0.8 W/m²k u-value (triple glazed)†
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From 1.3 W/m²k u-value (double glazed)†
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1200mm maximum panel width
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3000mm maximum panel height
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Water tightness to 900Pa (Class 9a)*
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Air permeability to 600Pa (Class 4)*
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Unique locking panel catch
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Low threshold or weathered track options
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Double rebated frames
Come and Experience the Sapphire Difference
We know that choosing new windows and doors is a big decision. That’s why we invite you to visit our showroom, where you can see, touch, and experience the quality of our products firsthand.
You’ll meet our team, hear our story, and get expert advice tailored to your needs—no pressure, just honest guidance.
