The modern timber-frame house is like a large piece of furniture, intended to be both visible and appreciated. Because all the space within is opened tot the living area, the timber-frame tends to provide more volume per square foot, which makes small spaces feel larger and large spaces more dramatic. Built to last 300-600 years, the timber-frame structures survive because of their rugged strength, but also because the frame is an open skeleton, it allows extensive flexibility and long-term adaptability. Additionally, because the timber-frame is separated from its insulating skin, it is among the most energy efficient type home available.