Ultra-slim sliding doors

Break down the boundaries between inside and out

More than 20 years of manufacturing specialist door systems

Superior designs made bespoke to all requirements

Sunflex-trained and supported installers located nationwide

Ultra-slim framed sliding doors

The SUNFLEX UK range of ultra-slim sliding doors combines narrow sightlines with advanced engineering and smooth operation to create the perfect system for large glazed openings.

The SVG20, with incredibly thin 20mm sightlines, and the SVG30, with slender 30mm intermediate frames, provide a genuine slim framed system whichever angle you view the doors from, making the system ideal for breaking down the boundaries between inside and out and flooding your home full of natural light.

The versatile design of the systems allows for large panels up to 3 metres wide while maintaining the ease of use, advanced security and superior product quality for which SUNFLEX UK products are renowned.

Every SUNFLEX UK sliding door is manufactured by hand in our own factory, ensuring the performance you would expect of a SUNFLEX UK system.

  • Stunning design Narrow 20 or 30mm sightlines create an almost seamless connection between inside and out.
  • Flush track available With innovative flush floor designs that create seamless connection between inside and out.
  • Advanced security protection Fitted as standard with locking mechanisms that are Secured by Design™ award-winning and PAS 24:2016 compliant.
  • Fill rooms with natural light With panels up to 3m wide, our ultra-slim sliding doors are perfect for creating moveable glass walls that fill rooms with light.
Secured by Design PAS Logo Made in Britain
  • Ultra-narrow sightlines and slender frame depths
  • Flush stacking panels as standard
  • A range of configurations including pocket sliding doors and open corners

  • NEW | SVG20

    Designed with incredibly narrow 20mm sightlines, the SVG20 is the latest addition to the innovative range of SUNFLEX UK sliding doors.

    With no requirements for external reinforcing, the SVG20 provides the narrowest combination of sightline width and frame depth of any sliding door on the market and matches its stunning appearance with effortlessly smooth operation and advanced security.

  • SVG30

    The hugely popular SVG30 with slender 30mm sightlines provides the ultimate combination of slim frames and design flexibility and is exclusively designed, manufactured and available from SUNFLEX UK.

    The SVG30’s advanced weather performance ensures that it is suited to even the most exposed locations, whilst providing the same advanced standards of security, usability and quality as the rest of the SUNFLEX UK sliding door range.

Sightlines 20mm 30mm
Frame depths 59mm 59mm
U-Value Double Glazed From 1.2 W/m²k † From 1.2 W/m²k †
Maximum panel width From 800mm to 3000mm From 800mm to 3000mm
Maximum panel height Up to 2800mm depending on glass specification Up to 3000mm depending on glass specification
Secured by Design™ Yes Yes
Water tightness To 300Pa (Class 7a)* To 300Pa (Class 7a)*
Air permeability To 600Pa (Class 3)* To 600Pa (Class 3)*
Flush stacking Standard Standard
Track options 2 – Double or triple tracks 2 – Double or triple tracks
Cover plates Fitted as standard Fitted as standard
Pocket sliding option Yes Yes
Moveable corner post option Yes Yes
Lift and slide option Yes Yes

* Water tightness and air permeability test performance is dependent upon a number of factors including system configuration and panel sizes.

† Thermal performance is dependent on glass specification.

Why choose a SUNFLEX UK ultra-slim sliding door?

At SUNFLEX UK we have been designing and manufacturing ultra-slim aluminium sliding doors for almost 10 years, investing heavily to reduce sightlines through our ongoing research, development and testing process.

This experience allows us to ensure that our customers receive finished products that don’t just look good, but also perform perfectly and effortlessly. Crucially our ultra-slim sliding doors combine their stunning appearance with advanced security protection, thermal performance and weather protection to add a wow-factor to any type of project.


Colour options

We hold three of our most popular colours in stock to provide the quickest lead-times and most cost-effective option. If you want to truly personalise your sliding doors, you can choose from more than 200 RAL colours in a range of finishes, and even select different colours on the inside and outside of the frames to match the internal décor and external finishes of your home.

SVG20 and SVG30 - Standard colours

  • Anthracite Grey (RAL 7016) matt finish Anthracite Grey (RAL 7016) matt finish
  • Slate Grey (RAL 7015) matt finish Slate Grey (RAL 7015) matt finish
  • Graphite Black (RAL 9011) matt finish Graphite Black (RAL 9011) matt finish

Track options

  • Twin track | No sill | Internal flush floor detail

    Twin track | No sill | Internal flush floor detail

  • Twin track | With sill | Internal flush floor detail

    Twin track | With sill | Internal flush floor detail

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.


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