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Types of Double Glazing Door Hinges If you have an opening between the top and bottom of your door, but the top and bottom are aligned perfectly and the hinges are in perfect alignment, then your hinges could be out of alignment. This is a simple fix. Just apply an Allen key to turn the compression adjustment screw just a bit. can adjust or repair and replace upvc double glazing hinges to make sure your doors are in good working in order to avoid draughts, damage and leaks. Butt Hinges A butt hinge is a