Interior peak temperature by construction type Same sun, different intelligence in the roof. Bar chart showing interior peak temperatures Concrete rooms peak highest at forty one point six degrees Celsius, fired brick at thirty seven point four, and mud brick vaulted rooms at thirty point four. 45 C 40 C 35 C 30 C 25 C 41.6 C Government concrete 37.4 C Fired brick flat roof 30.4 C Mud brick Nubian vault -11.2 C vs. concrete shell