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0113 350 8740

sliding doors by alpine aluminium

Breathe new life into your home

- With Alpine Aluminium's AP20 Bi-folding door -

AP45 Aluminium Sliding Door exterior

Dual colour option

AP45 Aluminium Sliding Door turnaround

High Security - Secured
by Design, PAS24 Certified

low threshold aluminium sliding door

Available in
any RAL Colour

high security sliding doors

7 Day Turnaround -
The Fastest Available in the UK

Aluminium Bi-folding Doors

AP20 Bifold doors


Our AP20 aluminium bi-folding doors incorporate the very latest Alpine Approved technology and thermal energy efficiency. Multiple panels can be added and finished in a wide range of colours, allowing you seemingly endless configurations tailored to perfectly match your home layout and lifestyle. As well as looking good, our AP20 bi-folding doors are highly secure and have been fully certified under the ‘Secured by Design’ scheme.



call alpine aluminium today

0113 253 0254

Register Your Details Online Today to Reserve Your
10% Discount
and Alpine NOW Upgrade!

AP20 Aluminium Bifolding Doors


Our AP20 bi-folding door is available in up to 7 leaves each way (14 total) to allow for the largest possible openings. To suit the specific application, the door leaves are able to open either from the left or right of the opening, either opening towards the inside of the property or to the outside - the choice is yours. Our AP20 folding aluminium doors are incredibly secure and following stringent testing is PAS-24 security rated.







Product features


  • Thermal properties of 1.0 U W/m2K
  • Panels up to 3000mm high and 1200mm wide
  • Above ground bottom rollers
  • PAS 24 Security rated
  • 120mm sightline for maximum vision
  • Incredible thermal and sound insulation
  • Engineering grade running rollers for a smooth opening and closing operation
  • Low threshold option
  • Single or dual colour combinations
alpine aluminium slimline ultras sliding door

Simply register online today for a 10% discount,
extended guarantee and upgraded spec on your AP20 order


If you are looking for aesthetically stunning design combined with incredibly thermally efficient aluminium bi-folding doors, then get in touch with one of our friendly sales team today or visit us at our showroom in Leeds. An Alpine Bifolding Door Specialist will be able to help you with a wealth of useful advice whilst providing you with a no-obligation quote based on your individual requirements as well as securing your 10% discount, 15-year guarantee and FREE Alpine NOW upgrade.


Request a copy of our AP20 Bifolding Door overview brochure and receive a 10% discount!


Simply request a copy of the AP20 overview brochure by visiting our downloads section, calling our admin team or completing the no-obligation enquiry form today, and receive a 10% discount, extended guarantee and FREE Alpine NOW Specification Upgrade on any subsequent order.




Alpine Now - Our Priority Upgrade


Alpine Aluminium understand that it is not just a bespoke product that you require, but also a bespoke service. From our manufacturing centre in Leeds, we are able to achieve the fastest turnaround currently available in the UK. In addition, we have a wide range of Alpine Approved options and components which will ensure your sliding doors, windows or roofs exceed all expectations with Alpine NOW! 

Alpine Now Upgrade Features:

upgraded glass for better efficiency

Upgraded Thermal Glass


Upgrade today to improved
thermal efficiency with the 4S
glazing system

5 day turnaround doors and windows5 Day Turnaround


From 7 days to 5 days.
The fastest in the UK!

15 year guarantee15 Year Guarantee


Extended guarantee from
10 years to 15 years


colour matchingSeamless Colour 


Perfectly seamless look with matching RAL7016 gaskets, handles and hinges

any colour bifold doors and windows
ANY Colour


Choose ANY colour
to match your home





get a free quote today

Contact Us

Alpine Window and Door Systems Limited
Unit 6, Hawthorne Court
Howley Park Road
Morley, Leeds
LS27 0BN
Tel: 0113 253 0254
Fax: 0113 252 2202
Aftersales: 0113 4689291
Company Number: 05466675