UPVC Door Handles Replacement Guide Once you have the correct measurements, replacing upvc door handles is a simple DIY project. These measurements include the distance from the handle's backplate mounting centres (sometimes called PZ) to the center of the keyhole. <img width="321" src="https://www.repairmywindowsanddoors.co.uk/wp-content/uploads/2024/05/Bifold-Door-Handl
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