We are mainly using local materials with a small environmental footprint like bamboo, timber and clay. With the exception of roof, concrete and iron, all materials are from the village, or even the site itself. Roof is chosen based on environment, ability to keep rain out and longevity. Concrete is used with care as slabs/foundation to be able to build with adobe. Iron is only used as reinforcement in cases of heavy load, otherwise bamboo is the preferred reinforcement material.