Loader Monteith tends to have a "fabric-first" approach to sustainability. Any work happening on the roof or walls received a thick coat of insulation, and all glass is triple-glazed. "It’s like the house has a warm hat and jacket and a dry pair of Welly boots," says Loader. "Once you’ve done a lot of the hard work, you can make the heating system as small as possible." Photovoltaic solar panels on the roof collect energy throughout the day.