The floors, made from Wormy Maple (left), were harvested from a certified sustainably managed forest in New York State, which the architect toured to ensure no clear-cutting was done—the trees are selected and harvested. Now they cover roughly 2,200 square feet on all three floors. The floor was coated with polyurethane, and treated with ultraviolet light on the final coat to seal in any of the finishing chemicals. That prevents off-gassing, and the chemical bond increases the wood’s durability. The lighting (right) is provided by LEDs, which last longer than traditional incandescent bulbs and use a small fraction of the electricity.