Aluminium Bi-fold Doors

Luxury Aluminium Bifold Doors designed & manufactured in INDIA.


Thanks to the influence of Grand Designs and our desire for more light and space, bifold doors have become a phenomenon. If you have the space to stack the Bifold Doors to the left or right, or on both sides, when they are fully open, then a Bifold Door could be ideal for you. Bifold doors can be fully opened to around 90 per cent of the full opening width, allowing you the flexibility to let in lots of fresh air and move around freely. On days when you don’t wish to open the doors fully, you can choose to have a single traffic door, allowing you easy access between your home and garden all year round. STRETTA Bifold doors are the ultimate alternative to Bifolding doors.

STRETTA Aluminium bifold doors offer exceptional weather resistance and are made to bespoke sizes to suit your project.

Key features of STRETTA Aluminium Bifold Doors

  • Industry leading weather rating
  • U-Value of 1.6 with double glazing
  • Very slim frames, more glass area
  • Available in Anthracite Grey or White from stock
  • Contemporary square leaf
  • Fully weather rated standard threshold - 54mm
  • Discreet pop-out handle to operate shoot bolt
  • 3 star diamond rated cylinder
  • Up to 7 opening sashes


  • Available in Chocolate Brown, Deep Black
  • Dual colours available with Grey or Black outside and White inside
  • Softline leaf

Sashes are internally beaded.
28mm square bead as standard for double glazing.
32mm square bead for triple glazing.

Colour Options
From stock, we supply:
Single colour:
Anthracite Grey Matt RAL 7016
White High Gloss RAL 9910

Also available on a slightly longer lead time:

Chocolate Brown, Deep Black or dual colours: Anthracite Grey on White or Black on White

Sash options 2, 3, 4, 5, 6 or 7 panels
Inward or outward opening doors
Sliding options to left or right
140mm sightline at interlock in closed position.
Black TPE
Woolpile weatherseal is Grey
General Description
Totally bespoke bi-folding doors designed and manufactured by KAT. Excellent thermal, acoustic and security performance. 14 possible configurations with a 10 year manufacturers' guarantee. PAS 24:2016 accredited.
28mm double glazed sealed units as standard, when requested
Planitherm Total Plus Low Emissivity, soft coat glass
Clear or Obscure glass
Argon filled units with Warm Edge Spacer
High performance thermal break - double glazed doorset. U value of 1.6 W/m2K (1.4 W/m2K U value with triple glazing).
Triple glazing can be accommodated up to 44mm.
(28mm/32mm/36mm/44mm available).
Stainless steel wheels and rollers with 4 stainless steel wheels per carriage.
Hinges in Black, White or Silver,
Lever/Lever handles on master door available in Black, White or Satin
Unique intermediate pop-out handle to operate shoot bolt in Black, White or Silver.
Shootbolt locking in head and base at interlock
3 star diamond rated profile cylinder
Outerframe dimensions
70mm deep outerframe
Outer frame minimum doorset width: 1500mm (based on 2 panels)
Outer frame minimum doorset height: 1930mm
Sash dimensions
Square sash leaf and square bead
Softline Sash option (extended lead time and higher cost)
Individual Sash minimum width: 700mm
Individual Sash maximum width: 1200mm (if double glazed only)
Maximum Sash height: 2400mm
Individual sash maximum width: 1000mm (if triple glazed)
Maximum individual sash glass weight: 100kg
140mm at interlock

Sightline dimensions
Head 110mm
Cill 130mm
Jamb 110mm
Meeting Stile 140mm
Security and Performance
Has been independently tested to meet PAS 24:2016.
Maximum width of doorset is 7 metres
Maximum height or doorset is 3 metres
Severe weather rated to BS6375-1:2009
Class 9a (600Pa) water tightness;
Class 4 (600Pa) air permeability
Class AE2400 (2400Pa) wind load
Part Q accredited

Threshold Options
54mm Threshold - thermally broken, with full weather rating - Internal face 34mm.
34 mm Low threshold Part M compliant option - not weather rated
22mm Room Divider
96mm, 150mm and 190mm projected cill options.
25mm upstand from base to top of cill.
Non-weather rated thresholds for internal use only: 22mm, 34mm and 34mm ramped.



Aluminium is the perfect material because it allows for narrow, aesthetically pleasing frames, is extremely strong and very low maintenance.

Our doors have been independently tested against wind, water and air pressure. They come with an extended 10 year warranty and our simulation tests have shown that they have a life expectancy in excess of 25 years.


Material Information


Aluminium is the optimum material for manufacturing windows and doors and that is why it is widely specified by Architects for most serious new build and refurbishment projects.

Aluminium doors require very little maintenance, just an occasional wipe with a damp soapy cloth and a regular check to ensure the track is kept free from grit and small stones to ensure the doors continue to run smoothly. Aluminium is more resistant to the elements than uPVC and is not likely to warp or rot. We offer a 10 year warranty on standard paint and a 25 year warranty on Marine Grade paint.




With our huge range of exclusive doors we also offer you a complete range of accessories from handles, to threshold options, to opening configurations.

A lever handle in Black, White or Satin is fitted to the master or traffic door, with a pop-out ‘T’ shaped handle to the intermediate doors which allows for square flush stacking panels when the doors are fully open.

Please consider your choice of ancillary hardware carefully because that is what you will eventually notice most when your products are installed.



Safety & Security


Our bifolding doors are designed to discourage intruders, thanks to the security hinges, locking mechanisms and a unique heavy-duty roller design to provide the security and
reliability demanded in high traffic applications.

All these elements prevent our bifolds being lifted off their base channel or being jemmied when closed and the whole system conforms to security standards.

Safety & Security

Colour Options


We carry stock of the two most popular colours and finishes, so that we can manufacture your bespoke Bifold Doors with a fast turnaround. These are Anthracite Grey in a matt finish and White in a high gloss finish.

We also offer the following colours and finishes:

  • Chocolate Brown matt
  • Deep Black matt
  • Dual colour Grey matt outside / White gloss inside
  • Dual colour Black matt outside / White gloss inside

Just let us know your sizes and how you would like the doors to open and we can make your Bifold door to your bespoke dimensions.

Call into our Showroom in Macclesfield and we can show you a colour chart demonstrating each of the colours available.


Questions? us today!

If you wish to find your STRETTA design partner, have any questions or would like to discuss our premium range of products then please contact us.