Opening a bi-fold door requires lif

Opening a bi-fold door requires lifting the entire weight of the door, so a bi-fold door usually has a powered operator. You can reduce the lifting force on the operator by using counterweights to balance the weight of the door. Bi-fold doors are almost always operated with a cable system. Cables are attached to the bottom of the door at several points, which keeps
the lower door panel from bending excessively. The winch is typically installed on the door itself, which makes the installation neat and compact.Bi-fold doors close by gravity. When the door approaches the fully closed position, the closing force on the sides of the door becomes zero. As a result, bifold doors tend to hang slightly open. This allows a
substantial amount of infiltration if the door is installed outside the door opening, rather than inside a frame. Manual latches may be installed to complete closing the door, but manual latching tends to be ignored if the door is opened and closed frequently. Some manufacturers offer automatic latches. Get this feature