A hinge assembly for use on a structure having a first structure portion and a second structure portion. A first mounting plate configured to mount to the first structure portion and a second mounting plate configured to mount to the second structure portion. A hinge hingedly connecting the first mounting plate and the second mounting plate and configured to allow rotational movement of the first mounting plate and first structure portion relative to the second mounting plate and second structure portion between an open position and a closed position when the mounting plates are mounted to the corresponding structure portions. A tightener acting between the first mounting plate and the second mounting plate, the tightener configured to pull the first mounting plate towards the second mounting plate.