For over 35 years, SUNFLEX has been a leading designer and manufacturer of high-quality aluminium bi-fold doors. With a range of products available, you will always be able to find the right solution for your home.
For example, the SUNFLEX SF75eco combines thermal performance and sleek design, meeting all modern Building Regulations. It also comes with triple-glazing and offers Passivhaus-level efficiency, with a U-value as low as 0.8W/m²K.
SUNFLEX Aluminium Bi-fold Doors feature:
Superb energy efficiency: With U-values from just 0.8W/m²K no aluminium bifold is more thermally efficient.
Advanced security protection: Carries prestigious Secured by Design™ award and exceeds requirements of PAS 24:2016 testing.
Aesthetic appeal: Slender frames and panels up to 3000mm high and up to 1200mm wide to maximise glass.
Industry-leading performance: Capable of superior water tightness (900Pa – Class 9a*) and air permeability (600Pa – Class 4*) testing performance.
“SUNFLEX bifold doors are a brilliant blend of innovation and performance. With options like the SF75eco, they meet the highest standards for thermal efficiency without compromising on contemporary design. From triple glazing to sleek profiles, they offer a premium solution for homes that demand both style and substance.”
Regardless of season, the SUNFLEX aluminium bi-fold doors are designed with industry-leading thermal performance, helping keep your home warm, and your energy bills down.
In contrast to keeping your home warm, the SUNFLEX aluminium bi-fold doors undergo rigorous independent weather testing in laboratory conditions, making them ideal for those living in rural or coastal locations.
Every SUNFLEX product is manufactured to strict standards of child safety. The SF75eco features an exclusive anti-slam panel catch and finger cushioning gasket, giving you additional peace of mind in a family home.
Our process begins with a one-on-one consultation with a door specialist. They'll listen attentively to understand your vision and needs for your home. Together, we'll consider your home's architectural style to recommend a door that best compliments your home. We'll guide you through all your options, from classic styles and rich colours to high-performance glazing and secure hardware.
Once you've made your choices, our experts will meticulously measure your door openings for a perfect fit. We will then source your door and we’ll be in touch to arrange an installation date that suits you.
Our experienced installation team will ensure a smooth and efficient door replacement process. This can take anywhere from a few hours to a few days depending on how many windows and doors are being replaced. We take meticulous pride in our work, ensuring every window and door is installed with precision. Once complete, our team can walk you through how to operate and maintain your new products.
"The door really is fabulous. The new door makes a real statement to the front of the house. We thought that choosing a door would be difficult - It was ideal seeing all the options in the flesh"
"We really love the new front door. The style is perfect for this period of home. The quality really shows, the house feels so much more secure now. The showroom team have been fantastic from the start through to the finish"
"The reason for choosing Timber Windows of Winchester & Horndean was because of their good timber windows and knowledgeable staff. The windows and doors have met our expectations in every way."
"We were absolutely delighted with the new door as soon as it went in. It looked amazing, with more light coming into the hall and the pure quality of the door is awesome. No more draughts and fully secure. I cannot tell you how many people have commented on how lovely it is! Which is such a compliment to Timber Windows of Horndean & Winchesters products, as not many people talk about front doors, but they do ours!"
