Okay, I admit I am envious. I’m envious of the new house my friend recently built. I’m especially envious of the energy-efficient spray foam insulation, modern windows and doors, and fuel-miser heating system. As I lug firewood and watch my woodpile shrink through the long Maine winter, I often wish I could start over, building my house with all of the latest construction materials and systems. But then, I look at the charm of our older house and the spacious property it sits on, with westerly views across the lake, and my jealousy fades.