Sunset: Preserving the foundation of an existing house this second floor addition is oriented true south for passive and active solar performance while capturing dramatic views of the University of Colorado and Flatirons. The upper volume is clad in a locally harvested forest salvage wood and left untreated to slowly weather to a muted grey. Bedrooms and a guest suite below are covered in a stucco finish with control joins for some visual interest. 10kW of photovoltaic panels power a forced air geothermal system for heating and cooling with external shading on the south facing glazing for thermal comfort.