Installation of a Concrete Wall Vinyl Liner Pool requires assembling forms in the shape of the desired pool with form panels which then make the shape of the pool. Similar to how forms are set up for house foundations, so this process takes time. These forms are limited in the shapes of pools you can make since no one can own all the forms that exist. The over dig or disturbed soil around is also great, which then will delay the patio construction. Cement is poured into the forms. Once the cement hardens, the forms are removed, this then becomes the sides of the pool and the liner is then measured and fit over this shape. But again, the floor is just a thin layer of vermiculite over dirt. This type of pool is almost the same price of a gunite pool but does not have the commercial qualities of a mono-lific cement shell that a gunite pool has.