Aluminium Bi-fold Doors

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Luxury aluminium Bifold Doors designed & manufactured in the UK


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. KAT’s Bifold doors are the ultimate alternative to Schuco Bifolding doors.

KAT Aluminium bifold doors offer exceptional weather resistance and are made to bespoke sizes to suit your project. Our Master door handles are designed exclusively by us and are made from stainless steel.

Key features of KAT Aluminium Bifold Doors

  • Softline sash
  • Chamfered 28mm bead
  • 96mm, 150mm and 190mm cills
  • Industry leading weather rating
  • U-Value of 1.6 with double glazing
  • Fully weather rated standard threshold - 54mm
  • Any RAL colour available in a Textura, Matt or Gloss finish
  • Designer door handles designed by and exclusive to KAT
  • Discreet pop-out handle to operate shoot bolt
  • Very slim frames, more glass area
  • 3 star diamond rated cylinder
  • Up to 7 opening sashes


  • PAS24:2016 enhanced security
  • 28mm square bead

28mm chamfered bead as standard for double glazing.
28mm square bead is available as an option.
Sashes are internally beaded.
Colour Options
We can supply any RAL colour, luxury textured effects or anodised finishes, which includes Marine Grade.

From stock, we supply:
Single colour:
Anthracite Grey Matt RAL 7016
Black Matt RAL 9005
White Gloss RAL 9910

Dual colour: Anthracite Grey 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.
Open unobstructed corner configuration is possible.
Black TPE
Woolpile weatherseal is Grey
General Description
AluK BSF 70 system, 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. Part Q and PAS 24 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. Black hinges.
Lever/Lever handles on master door
Unique intermediate pop-out handle to operate shoot bolt
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
Outerframe maximum doorset height : 2930mm
Sash dimensions
Softline Sash with Chamfered Bead
Square 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
AluK BSF70 system 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); wind load Class E2400 (1800Pa)
Part Q accredited

Threshold Options
54mm Threshold - thermally broken, with full weather rating - Internal face 34mm.
Low threshold Part M compliant option - not weather rated
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.
KAT Bifold threshold test report will be available soon.

Product Awards




We manufacture KAT Aluminium Bifolds in Cheshire.  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.

Our KAT bifolding door handles are luxury products, made exclusively to a KAT design and crafted from Stainless Steel and guaranteed for 10 years.

Please consider your choice of ancillary hardware carefully because that is what you will eventually notice most when your products are installed. Check out the finishes on our handles because it is attention to detail that helps make this unique product range so exciting.




Safety & Security


Our bifolding doors are designed to discourage intruders, thanks to the master door security locking system and intermediate handles with shootbolts which can also be supplied with key locking. We fit a 3 star diamond rated cylinder to all Aluminium Bifold Doors. The whole system conforms to PAS 24:2016 security standards.

All these elements prevent our bifolds being lifted off their base channel or being jemmied when closed.

Safety & Security

Colour Options


A little time and care with your choice of colour is advised and your selection should be influenced by your style of property, surrounding architecture or your other windows and doors.

We can supply any RAL colour, luxury textura effects or anodised finishes, which includes Marine Grade.

Our standard finishes are:

Anthracite Grey, Black or White

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 RAL colours available.