Manufacturers of award-winning bifold doors and sliding doors.

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Welcome to SUNFLEX UK - The Specialist Bifold & Sliding Doors Company

SUNFLEX UK is a renowned manufacturer of superior quality glazing systems, including award-winning bifold doors and sliding doors.

We supply our advanced door and window systems to the glazing trade and work with a carefully selected network of glazing trade distributors across the UK.

We have over 20 years’ experience as a bifold and sliding door manufacturer. Our products are renowned for their performance, aesthetic appeal and security, and they carry a range of prestigious accreditations and awards, cementing SUNFLEX UK as one of the most experienced bifold door manufacturers anywhere in the world.

Sunflex UK
Secured by Design PAS Logo Build It Awards Winner
  • Doors which operate smooth and easily
  • Industry-leading weatherproofing
  • High security door systems
  • Over 20 years’ experience of aluminium doors

Take a look through our website to browse the extensive range of products we offer, including bifold and sliding doors, heritage doors, aluminium windows, entrance doors, internal glass partitions, glass roofs and commercial doors. To get expert advice and to request a quote, please visit our postcode checker and we will refer you to your nearest distributor.

SUNFLEX UK works with carefully selected distributors who install SUNFLEX products across the UK. We provide distributors with first-rate installation training, detailed technical advice and our in-house product design expertise, helping them meet the needs of their customers from the initial discussion all the way through to the completed build.


Discover our ground-breaking glazing systems, all custom-made to your requirements.

For more than 20 years, we’ve been an innovative bifold and sliding doors company committed to staying at the cutting-edge of technology and innovation. This has helped us produce doors that excel in all areas — from security and design to insulation and weathering.

Every system is manufactured to the individual requirements of each project, with a range of designs, configurations, colours, hardware and finishing touches to choose from.


Whether you like to keep up-to-date with the most modern stainless steel materials we use in our door furniture or are learning how U-values are key to the excellent insulation found in our SUNFLEX UK glazing products, you can find it all in our blog posts about SUNFLEX UK aluminium doors and windows.

‘Best Glazed Doors’ | SF75eco bifolds win prestigious Build It award

SUNFLEX UK is thrilled to announce that our industry-leading SF75eco bifold door has won t...Continue reading

Why are bifold doors so popular?

Over the past 15 years bifold doors have soared in popularity thanks to the lifestyle trend for open-plan living spaces and creating a connection between home and ga...Continue reading

Weather tightness of doors – what you should know

Weather performance - an introduction Unlike thermal performance, there is no minimum standard required under Building Regulations for weather performance ...Continue reading

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Become an accredited distributor

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.