Big Ass Fans keep the loft from getting too hot in summer; SIP insulation helps keep it warm in winter. This second level accommodates the master suite and a small office space, furnished with a CB2 desk and a vintage chair purchased in Chicago. Another unique feature of the space is the hardwood floors, which are heart pine salvaged from the bottom of Lake Superior.  A Family Salvages an 1880s Barn to Create Their Nearly-Net Zero Escape by Caroline Wallis from House of the Week: An Eco-Friendly Family Retreat Built with Reclaimed Materials