1. Samuel Isaac Ruibal Rosn Aixa Fernndez Fernndez Laura Fresco Magadn Insulators and metals

2. It is produced by matting, condensing and pressing woolen fibres. Some types of felt are very soft, some are tough enough to form construction materials. Felt/Fieltro 3. Building uses It is used for waterproofing roofs to prevent ingress of moisture, and it has a lot of uses too, but not for buildings. 4. Steel/Acero Steel is an ferrous metal that has carbon and iron. The steel is the most popular alloy. It catches a percentage between 0.2 and 0.3 of carbon and iron. 5. Building applications. The steel is used in structures for different systems of construction from a group of constructive techniques and vanguard materials. 6. Buildings with steel. The Eiffel Tower is one of the most important buildings with steel. It is in Paris (France) And it's one of the most important buildings of the world too. 7. Hope you like the presentation, thanks for your attention.