Hello! First time poster here. My fiancé and I are building a cob/straw bale house with a round pole frame, ridge beam and rafters. I have question regarding insulation. Would you put insulation between the rafters like a conventional home? My confusion comes from having seen many roofs in cob homes but the round pole rafters are left exposed, so where is the space for the insulation? Confusion. Thank you for any help!