I need to decide quickly whether to have french windows or a normal window in my loft conversion. I'd rather a normal window as i can fit the radiator underneath and personally I prefer the look. There will be the velux on the far side of the room so there will be lots of light. But I am worried about heat in the summer so I'd love to hear if people think that the french doors are essential to keep the room cool in summer. Any advice gratefully received!