The Patwin used a variety of materials to build their homes, including tule reeds, willow branches, and bark. Tule reeds were the most common material used, and were woven together to create walls and roofs. Willow branches were used to create frames for the homes, and bark was used to cover the roofs and walls. The Patwin also used mud and clay to plaster the walls of their homes, which helped to keep them cool in the summer and warm in the winter.