We've had a serious cold snap here in the northeast, bookended by a couple of nasty snow-bearing storms. Every time you click the thermostat up a degree, you're probably not thinking about why you're doing it. Are your customers? Winterproofing is a growing side business for many remodeling firms and all it takes is a few simple tools for this value-add. It saves energy, which translates to dollars saved, which equals happy customers.The latest article in the New York Times' "Pragmatist" series addresses this very topic.