Every rose has its thorn, including those supposed holy grails of sustainable products. CFLs contain mercury. Biofuel competes with farmers for topsoil. Now high performance windows, particularly those of the double-pane, Low-E variety, have become the bane of suburbia, as they can apparently melt your neighbors home—or at least their vinyl siding. That was the news from a surprising report on Boston’s Channel 5 news, sent to us by Infared New England, who tests for these sorts of things. It turns out that under the right circumstances, the windows work as magnifiers, focusing light on nearby buildings like a rascally child picking off ants. At least two area women have suffered the consequences, and there are plenty of similar videos on YouTube. So let this be a warning to you about the risks of vinyl siding next time you consider using it on a project. (Okay, let’s be honest, if you’re reading this, god forbid such a thought ever crossed your mind. Still, it’s pretty crazy, the unintended consequences of this business of ours. Eh, Frank?)