BiFold doors and windows
BiFold doors and windows are basically the same construction, just different sizes. The window sashes or door leaves are attached to each other and open by moving along a track at the top and bottom of the frame.
The advantage of bifolds is that you can open up the whole space and create a large opening in the wall.
The down side, in Wellington ,is that it is often too windy to make full use of them.
Another consideration is with weather tightness. If they are in an exposed position, some leakage can be experienced with 'vertical rain' we sometimes get in a strong southerly or northerly.
The width of the opening will dictate how many panels you have, with three panels being the most popular for doors and four panels for windows.
With a three panel unit you can have one panel act as a regular single door with the other two panels on a sliding bifold system.
A bifold window with four sashes can be between $2900 +GST and $3800 +GST depending on size and glazing.
Door pricing will be linked to size and the hardware used, however a single glazed, three panel unit would start around $3000 +GST, with a four panel large double glazed unit well over $5000 +GST.
The size of the doors and selected glazing will determine what hardware is used. Generally we install Assa Abloy running gear (either Weatherfold or Timberfold) specified to handle the size and weight of the bifold unit. Double glazing and the width of the doors will impact on which hardware is selected to ensure smooth operation of the unit.