How do you adjust a uPVC door that has dropped?

You can make vertical adjustments to correct a door that's dropped without too much trouble. Locate the adjustment slots and use the Allen wrench that came with your door, or buy a set of Allen wrenches of different sizes at your local hardware store. Make sure the head of your chosen wrench fits snugly into the slot. Depending on the adjustments that you need to make to the door, you’ll either have to turn your wrench clockwise or counterclockwise. Start by making 1-2 full rotations, and keep track of how many rotations you make. Then adjust the rest of the hinges with the same number of rotations to make an even adjustment. Take a look to see if the gap between the door and the frame is even all around. Then, open and close the door and see if it moves freely and latches securely and you're all set!