Radiant pool walls from Radiant Pools Manufacturer appear to be two inches thick, but they are actually made of two thin sheets of aluminum cladding styrofoam. The insulation value of these walls comes from a special type of foam called "geogrid." The geogrids help conduct heat away from the house and also reduce noise by acting as a sound barrier. They are available in a wide variety of colors and styles. The average depth of an in-ground pool is 4 feet, but depths up to 6 feet are available. The height of an above-ground pool can vary from 30 inches to more than 3 feet. Concrete pools are generally between 36 and 72 inches deep. Pools that are only 4 or 5 feet deep are referred to as "tubs." The width of an in-ground pool ranges from 20 feet to 100 feet or more. The length of an above-ground pool can be shorter or longer than the width. Concrete pools range in size from 25 by 75 feet to 200 by 200 feet. Other sizes are available as well. Thickness is important because it affects how you build your pool. The thicker the wall, the better it will be at keeping out heat and noise (unless you want it to do both of those things).