Maximum sizes for Bifold windows and 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 AllSeasons™ Bifold window and door panels of up to 2600mm high by 850mm wide are attainable.

Frame Types

Glazing Beads and Panel Types


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 your local Bradnam’s branch for advice.

Support Inquiries

Altus Technical Support call 0800 685 665 or email