The armor of the main gun turrets and their supporting tubes was 250 millimetres thick with roofs thick. Below the upper armour deck the armour of the support tubes decreased to . The turrets of the secondary armament had sides with roofs. The sides of the conning tower were thick and it had a 63-millimetre roof. It had a communications tube that extended down to the upper armoured deck that was protected by 100-millimetre armour. The funnel uptakes were protected by of armour for the height of one deck above the upper armoured deck.