Locking Options:

Our bifolds come with offset flush bolts as standard which allow you to lock the panels securely into place - these are always on the internal side of your door/window setup. Our standard offset flush bolt is shown on the left below. These sit flush in the frame and are located at the top and bottom of the required panels. Our second lock option is shown on the below right image. This is known as the 'dual twin bolt lock' which can lock with or without a key cylinder (quoted as an optional extra when requested). The dual twin bolt operates in the same way as the standard offset flush bolt, but allows operation of both bolts in one mechanism with a quick and easy handle movement. Usually the twin bolt lock is located halfway up the bifold, whereas the standard flush bolt are located at the top and bottom of the panel at a reachable height. 

Correct Operation:

When the bolts are set to the closed position, the weather seals naturally push slightly against the door panels in order to seal them well against the weather. Flipping the bolts to the open position without relieving the compression can make the bolts stiff to open and could damage the bolt mechanism - over time, this can cause the bolt mechanism to snap. It is really simply to relieve the compression on the panels though, just pull the panel slightly towards you with the handle and flip the bolts open like normal. To close the bolts the same action should be done, but in reverse. This will allow for easy bolt operation and ensure the long life of your hardware.

 

          

      Standard offset flush bolt                             Twin bolt lock (key or keyless)