15. The delegation was further shown various housing models involving innovative technologies where light technologies were used in order to build houses, which are resistant to rain storms and hurricane weather. These include: . The use of solid and resistant material to substitute massive metal roofs; . The use of armed cement as opposed to massive panels; . Utilising structures with thermal and acoustic conditions; . The use of economic technology for high buildings referred to as 'System Forsa (Mournders Transferables) and Sandino. These are simple technologies with low-weight panels and columns which people could carry and lift without having to use expensive equipment such as hoists and cranes; . The use of Systemas "PVC" Petrcacas - PVC is used and filled up with cement to produce up to three-storey houses. The walls are plastic and the cost of maintenance is very low; and . The use of Nucleo Gigiso - where solid roofs made of armed cement and a combination of metal covers are used to protect the houses from hurricane weather.