Bifolds are a great way to extend your living space in the summer by giving you an unobstructed opening to any outdoor living and entertainment areas allowing a greater sense of indoor-outdoor living.

Where you have an uneven number of panels, it is a good idea to include a hinged door. This allows convenient exit or entry without opening up the entire Bifold.

Bifolds are available as standard or in a Inline version, which folds back flush with the exterior cladding.

WT Bifold Door

Bifold Door Configurations

Colonial Glazing Bars     Passive Ventilation     Hardware     Jamb Liners     Flashings


Maximum sizes for bifold doors vary by width, height, wind zone, and glazing requirement. Your local Bradnam's branch will be able to advise you whether a configuration is possible or contact Altus Technical support.

As a guide, bifold panels up to 2.2m high by 0.85m wide are recommended.

Frame Types

Glazing, Beads and Panel Types


An Aluvent passive ventilator enables passive ventilation to be included into all bi-fold doors. Refer to the Aluvent section.



A standard range of flashings include 95mm, 84mm,71mm, 68mm, 63mm, 58mm, 53mm, 48mm, 45mm, 41mm, 38mm, 31mm, 25mm and 14mm. These have been designed to comply with E2/AS1 Amendment 6 requirements. Refer to the flashings section



Proprietary Altus NZ Limited bifold hinge and bifold roller assemblies are critical components to provide attractive visual and functional performance of doors and windows. Refer to the hardware section