I described heat accumulation
paper with isolation almost not have any, and ventilating during the night, and keeping it closed in the heatwave have no effects
Don't teach me building engineering and building physics, you know to little of it to teach me 0.1%growth
And yet, you don't know what you think you do. Insulation makes all the difference and does have a big effect with ventilation and heat accumulation. Just like with your stone building.