The team focuses on constructing gable walls and trusses for the roof in Needham. They decide to prefabricate trusses on-site for a proper fit. Emphasis is placed on the importance of wall and roof structure, ensuring parallel walls and correct floor placement. Ventilation strategies are outlined, and adjustments to the air barrier are made. The use of AirSeal boxes for electrical installations is discussed, with plans to complete the roof by next week.