Very unique exterior appearances and floor plans. Many have self-supporting roofs for open interior design. Shape allows for many windows in every room. Ideal for passive solar. Much variation in style and interior finishes - drywall, logs or paneling.
Several floor plans specifically for solar or wood heating.
Very easy to build yourself kits. Traditional or contemporary appearances just like a wood-framed house. Very strong and efficient with heavy insulation. Super-insulated and strong wall panels are set on a foundation. No wall framing is needed.