For GTZ Construction Company , concrete is one of the greatest inventions ever devised by humankind. Why? No, not because it is our livelihood. Actually, it's the reverse. This company was created because we understand that concrete construction and repair will always be in demand due to it being a superior building material. Concrete takes the best aspect of masonry, its durability, adds much more strength with reinforced concrete, while integrating design flexibility within its initial state.