The concrete pools are the most common for their high strength, durability and great appeal, thanks to the myriad of finishes they offer. They are usually made of concrete or a concrete block formwork system. The disadvantages are the long time of its construction and the budget they require. Its construction consists of excavating the ground and covering it with a polyester sheet. Then an iron sheet is placed to assemble the glass and covered with classic concrete or form blocks. They are resistant, waterproof and durable.