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Threshold options
Alumina bi-fold doors are available with a choice of thresholds.
Frame Only
- 62mm high
- To be used in conjunction with a stone cill
Low Threshold
- 23.5mm high
- Minimises trip hazards; ideal for family living
- Requires no trench excavation, so is simple to install
Low Threshold and Full Ramp
- 26.5mm high
- Makes the low threshold Part M compliant for wheelchair access
- Requires no trench excavation, so is simple to install
Frame and Cill
- 92mm high
- The most common threshold option for the majority of building types.
Low Threshold and Half Ramp
- 26.5mm high
- Enables the interior flooring to be fitted flush to the doors
- Requires no trench excavation, so is simple to install
Fully weather tested
The Alumina thermally broken low threshold has been weather tested on a full sized, 2.5m high bi-folding door, achieving fantastic results – read more here.
More options
Colour Options
Discover the wide range of colours and finishes available with Alumina bi-fold doors.
Door Styles
Find out more about the styles and configurations available.
Choosing a Bi-Fold door
Here are a few guidelines on what to consider when choosing a bi-fold door.