Alumen Bifold Doors

Alumen Bifold Door Main Image

The Alumen Bifold door sets the benchmark for high quality aluminium folding doors at an industry beating price.

It combines ultra slim 120mm glass sightlines with the option of adjustable jambs, together with the build quality and aftersales support only Alumen can offer.

Through effective sourcing of parts and material we are able to offer this new range of doors, that is comparable in quality to both the SMARTS and Schuco door, at a price that is considerably more competitive.

  • Slimline 120mm Sight Line
  • Generous Size Limitations
  • Flush and Standard Threshold Options
  • Outstanding thermal performance
  • Optional adjustable jambs for ease of fitting
  • Ultra smooth bottom running
  • Max Sash Width = 1200mm
  • Max Height = 3000mm
  • 30mm polyamide thermal break for increased thermal values

Available on a 2-3 week lead time for popular colours, with full aftersales support, you must see for yourself this latest range of bifold door.

Please note that although this door is available on a supply only basis across the country we only offer an installation service to a restricted area.

For supply only pricing please visit our online shop, whilst for supply and installation prices please email us at

This door is primarily marketed for the trade, and further discounts are offered depending upon the size of business.


Alumen Sash - Typical Fold Section

Alumen Bifold Door Sash Profile

Alumen Bifold - Adjustable Jamb

Alumen Bfiold Door Adjustable Jamb Diagram

Alumen Bifold - Standard Jamb

Alumen Bfiold Door Standard Jamb Diagram

The following profiles are the main profiles that we use as standard.


Standard (Fully weathered) threshold.

20mm Ultra Low Threhold.

These thresholds can be combined with a choice of cill (see Threshold Options).


Choice of 85mm Stub cill, 150mm, 190mm or 225mm.


Squareline sash with typical sightline of only 120mm.


Squareline bead for 28mm units used as standard.


25mm add-on fitted as standard to the head of the frame where trickle vents are specified.

38mm add-on also available