BiFold Plus Open Out or In Low Threshold Bifold Doors:
Width:
Measure your aperture width in 3 separate places and then deduct 10mm off your smallest size. This will be your order size.
Height:
On bifold plus doors the track is concealed.
Measure from under your lintel to the top of the brick where the door will be fitted. Then deduct 10mm. This will be your order size. Please
ensure that your internal floor covering does not exceed the above dimension of 20mm. When the door is installed it must sit on a solid base, to not allow deflection in the running track.