Shear House, a single family house in Korea, seeks how a simple treatment in pitched roof typology improves environmental qualities and influences to program organization. The volume of gable on the West end changes its placement along with body of the house. It projects out toward South at the East end, while maintaining its triangular shape. The sheared volume is continuously pulled out to South responding to sun orientation. It creates a deep eave in South and a terrace in North. The eave blocks direct sunlight in summer and allow natural lighting in winter. Openings at terrace in the second level increase natural ventilation throughout the whole house. In addition double skin-facade controls heat and humidity thus the house reduces 20% of heat gain and loss in summer and winter.