The house contains 10 inches of polyurethane spray foam insulation, an economical option for remote villages because of its high R-value and lower shipping costs (it travels in liquid form in drums). It's airtight and moisture resistant, critical for maintaining warm, dry walls in an unforgiving climate. We would like to explore how cellulose, fiberglass, and other types of insulation could fit with this design. TIGHT BUILDINGS FOR FIERCE WINTERS