This $15 Screen Outside Your Window Cools 6x Better Than Your Blinds. Why Does Nobody Install It?

76% of the sunlight hitting your windows enters your house as heat. Your interior blinds only stop 10-15% of it. The rest pours in, heats your floors and furniture, and your AC runs all afternoon trying to undo it. There's a simple mesh screen that mounts on the outside of your window for about $15. It blocks up to 90% of solar heat before it ever touches the glass. The DOE, PNNL, and Lawrence Berkeley National Laboratory have all studied exterior shading, and the data says it outperforms the most expensive window upgrades on the market. In this video, I break down the research, the real cost comparison, why every home in Europe has this but almost nobody in America does, and exactly how to build and install one yourself in under 30 minutes.