Low-E, or low-emissivity windows, are catching on among homeowners for their ability to insulate houses with great efficiency; they let light pass through while keeping heat on the side from which it's coming in, thus making it cheaper and more eco-friendly to keep cool during the summer and warmer during the winter. Recently, there was a flap in Boston over low-E windows allegedly melting the vinyl siding on some neighboring houses. The diagram above shows just how hot the refracted light from one window was: The infrared scan to the right shows temperatures as high as 247 degrees Fahrenheit; yikes.
Unsurprisingly, neighbors whose homes were partially melted by these windows were not too pleased. One woman poignantly told WCBVTV "It's so upsetting I could cry. I'm not kidding you. I cry all the time. It's buckling, it's lifting off the house, it's curling up, it's just totally ruined."
However, upon closer inspection, the problem may not be the windows' emissivity, but their shape: