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Types of Double Glazing Door Hinges If your door is positioned at the top and bottom but there is a gap in the middle, it could be that hinges are not in alignment. It's easy to fix. Use an Allen key and turn the compression screw a little. Mr Misty will adjust, repair and replace your double glazing hinges made of upvc in order to keep them in good working order and prevent damage, leaks, and draughts. Butt Hinges A butt hinge is a type of hinge for doors that has two flat plates joined by a pin running thro