Preliminary structural testing suggests that PETBlocks can be made in smaller dimensions than traditional adobe blocks. This is clear advantage in areas such as refugee camps where 80% of the typical population is women and children. Smaller blocks are lighter and require fewer calories to lift. As recommended by SPHERE Project, shelters can be built to meet the needs of differently sized family groups. PETBlocks allow the designs of shelter to support different cultural norms. Shelter designs can be adapted to irregularly shaped sites and to uneven terrain.