Soil that expands, contracts, shifts, or is unstable for other reasons can impact a pool’s construction and long-term stability. For example, in an open excavated hole, sandy soil may cause the walls to collapse. Soil with a high clay content may expand or contract with seasonal temperature or moisture changes.
Professional pool contractors are accustomed to these kinds of challenges and have solutions for the majority of them. Tactics vary by the nature of the challenge and building practices in the local market.
Learn more here: Backyard Conditions that Impact Building Costs