We live in an old flat in Liverpool, and the summer suddenly becomes hot because of the large windows. Friends recommended https://www.tintfit.com/shop/e....nergy-saving-insulat where you can find modern energy-saving insulation solutions. After installation, the room heats up more slowly, sunlight does not damage the furniture, and the air conditioner does not work at full capacity. The investment quickly paid for itself through energy savings, and an added bonus is a more pleasant atmosphere for all family members.