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How to Adjust UPVC Door Hinges uPVC door frames are made to last for a long time, but they might require some adjustments and maintenance as they age. This is a simple task that can be done by using some basic tools. The first step is to identify what type of hinges your door is equipped with. Typically a flag hinge will allow adjustments vertically and laterally however a T or butt hinge might only allow lateral adjustment. Identifying the Hinges Hinges are vital for connecting windows and doors to their fra