WT Bay Table 
Colonial Glazing Bars     Passive Ventilation     Hardware     Jamb Liners     Flashings


Maximum sizes for bay and greenhouse windows and sashes 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, fixed window panels up to 1.2m high by 1.2m wide are attainable. Normal configurations involve multiple mullions and transoms that can be used in combination to meet most requirements. Limitations often relate to the structural nature of the support for the window, i.e. how much weight they can they hold.

Note: For compliance with NZS4211:2008 and or the NZ Building Code a security stay, safety latch, or restrictor may be required for certain sash sizes.

Frame Types

Glazing, Beads and Sash Types

Mullions and Transoms

Mullions and transoms are often chosen to add strength to the window to cope with higher wind loads.

Window Ventilation

Aluvent passive ventilator enables passive ventilation to be included into sashes and most fixed windows. 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.


Refer to the Hardware section.