Internally, the gate has a single room and a garderobe. The original internal access was by way of a stone spiral staircase,[7] but this was subsequently destroyed and a wooden replacement was inserted.[93] The room in the tower measures 10 metres (33 ft) long and 3 metres (9.8 ft) wide[22] and has an attic and an 18th-century roof.[94] The roof was reconstructed in 1832.[15] From the upper room, the machine-cut rafters are visible.[7] Drawings from the 18th and 19th centuries show a chimney in the roof, but the presence of a fireplace in the tower room is not mentioned in the available sources. The medieval roof was flat, with a castellated parapet and a wall-walk.[94]