How Do Upvc Window Locks Work

A upvc window lock mechanism is the gearing part inside a window that s driven by a handle.

How do upvc window locks work.

Most upvc windows are fitted with an espag lock which is operated using the handle. Attempt to open the door from the outside whilst it is unlocked. Open your upvc window and find the lock adjustment head. If your style of upvc window opens outwards rather than upwards you can move the lock on the sash forwards or backwards.

Usually the window lock will start to become more difficult to open and close before it breaks. They can literally be ch. Replacing upvc window handles is easy. Upvc door locks single spindle operation.

Before the lock breaks and jams the window lock is likely to have become more and more difficult to open. The most popular types are known in the trade as espag handles and are found on upvc windows. The upvc window lock below shows one of many different types. There are several different types made by different companies there is a gearbox to which you attach arms for the roller catches these arms come in different lengths and can be cut to length to suit varying sizes of sash the whole thing is screwed to a channel in the framing they wear out eventually and are not difficult to replace as long as you have the correct parts the same principle is used on pvc doors but they are usually a bit more involved with hook locks etc.

When a window lock is broken it will leave you with two situations. Look on the lower half of the open window sash about halfway between the lock and the bottom of the sash. This is a question that we get asked quite often so here s the answer. Typical window gearbox faults.

The window handle gearbox can break which is often the case or the shoot bolt espag or espagnolette and roller cams mushrooms jam or seize. This is the part that is operated by the handle. Offset type locks were used in the earlier days of upvc windows and had the gearbox mechanism fitted to one side of the lock rod. Inline espag rods have been widely used for a long number of years and are still fitted by some companies inline espag rods work by moving locking cams or rollers up and down the lock when the handle is operated.

When the gearbox breaks it doesn t allow the shoot bolts and the roller cams to return to the open position and the window won t open. The easiest way to detect a single spindle operation is. The window is opened and your not able to lock it or. If your window is open and the lock is broken this is a much easier situation than if the window is jammed shut.

Do not lock the door with a key. Dimension a backset dimension b mushroom height dimension c rail length dimension d rail width click on link below the long metal plate is the rail and the part in the centre of the window lock is the gearbox.