This $1 Sheet Behind Your Curtains Insulates Like Triple-Pane Glass. Why Doesn't Anyone Tell You?

About 30% of every dollar you spend heating and cooling your home leaves through your windows. The U.S. Department of Energy measured it. And the curtain you already own is blocking less than a third of that loss, even though there's a $1 fix, sold at every dollar store in the country, that pushes the same curtain toward triple-pane window performance. This video walks through the physics of why fabric curtains fail at the one thing windows need them to do, why the same material that keeps wildland firefighters alive in a burnover is the answer, and how to install it behind any curtain in your house in about 15 minutes. No tools. No contractor. No replacement window. I'll cover the back-of-the-hand test you can run today to see exactly how much heat your window is bleeding right now, the science behind why a $1 sheet from the camping aisle outperforms a $1,000 window upgrade, and the simple installation detail that almost everyone gets wrong (and that turns the whole thing into a heat sink if you miss it). If you've ever wondered why your AC runs all afternoon or why the room near the window is always the coldest in winter, this is the fix nobody in the $250 billion window industry has any reason to point at.