2009.048 . Extra Insulation
In cold climes, double-paned windows are common and do a good job of keeping the warm air in and the cold air out. Around here they're rare and on cold days we pull down the mini-blinds to keep cold air from streaming right through the glass. Last night I went a step further and draped an old blanket over the curtain rod to form a somewhat porous triple layer of insulation against the "cold" night air.