Cement: It is the most important building material in the world and has been known for hundreds of years and was made from the remnants of volcanoes, and then evolved in the Middle Ages and made of limestone and clay, and finally in modern times it is made in dry sand The same ingredients. White sand: It is a powder of stones and mixed with cement and water to form the so-called concrete (concrete), and concrete is used in pouring columns and building bases for all structures. Iron: It is on several types, some of which know what is in the form of cylindrical rods of different thicknesses, and from it know what is in the form of ribbed bars waisted the middle, and is used in iron reinforcing concrete to strengthen it and then called reinforced concrete. Brick wood: a material that does not fall into the core of the building and recognized what is wood in the form of long rods and a simplified surface, such as those found in park chairs, and is used to form the space required to pour concrete inside it to take the form of that space ). Bricks: It is a rectangular parallel pieces made of clay and water, which is used to build the walls of buildings between the columns and there is also a type of which is used to build cracks plus iron and concrete. Tiles: Tiles are used in the lamination of building floors and tiles have become several types in our time, including ceramic and granite and marble, and of course there is a price difference between those types. Gravel: Gravel is laid underfloor in buildings for flat surfaces, and a small amount of gravel with concrete mix is ​​used to increase cohesion with iron. Paints: Paints are used to paint the interior of the building in bright colors, and there are several types of paints, each with its own luster.