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uPVC Restrictor Hinges

uPVC Restrictor Hinges (H04) can replace standard window hinges on uPVC windows. Not many people know that a conventional standard upvc window hinge can be replaced easily with a restrictor hinge to improve safety. These double glazed hinges with an inbuilt restrictor come in various sizes for both side hung and top hung windows and provide a safety position of 100mm on opening. This is perfect for improving the safety of a window that opens fully like the 24 inch top hung which is unreachable when fully open! Real Safety in One Single Action! The safety catch automatically engages when the window is first opened requiring a push down tab release to disengage and allow the window to open to its fullest extent. When the window is closed the safety catch re-engages! It's imperative that the safety catch is in place each and every time the window is opened! With these upvc restrictor hinges the window locks back into a safety catch every time the window is closed or crosses back past the 100mm restricted line.

Quick Tips & Links

These upvc window hinges have an inbuilt restrictor position that can be released. Replaces standard hinges.

Can I fit restricted hinges in place of a standard hinge?

Yes you can provided that the track width is 18mm wide and the length of hinge is available.
Please note that side hung window hinges have one restrictor on the bottom hinge and top hung windows have restricted hinges on each side of the window. The latter is important for safety reasons should someone fall against the window (please be aware that some websites sell only one restricted hinge per pair on a top hung window and this is an extremely dangerous practice with a top hung window).

What is the maximum gap that is restricted?

The size of the window can vary the gap by a small amount but it is intended to open to around 100mm.

Are restrictor hinges handed?

The top hung hinges aren't handed as they have a restrictor on both sides so it is just a case of fitting the correct one to the correct side. The side hung hinges are handed as only the bottom hinge is restricted for safety reasons. In this case, when viewing the window from inside, if the handle is on the left side of the window frame it is a left handed hinge. See the diagram here:

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Handing diagram

How to determine the handing of a restricted upvc window hinge.

Does the restrictor re-engage when the window is closed?

Yes it will re-engage when the window is pulled past its restricted point and also when closed it will return to its set position.