If you are planning to start a pool construction project, your contractor begins the process by examining the property. This helps them determine the quality of the soil. Specifically, they test for expansive soil, which is an attribute that describes how much the ground expands. Soil expansion results in significant pressure, which could cause the pool to shift or crack after installation. Below is more information about expansive soil and how contractors handle it.

What Is Expansive Soil?

Expansive soil typically occurs when a large portion of the dirt in the yard is clay. This material is prone to expanding or shrinking based on the water it contains. Soil that has a large amount of fine clay particles expands when it is wet, as the clay absorbs more water than traditional dirt. As the soil swells, it presses against the pool, causing the shell to crack. The pressure can also cause the structure to lift from the hole. When the soil dries, the lifted pool can fall back to its original position or sink farther into the ground. The force of the fall can crack the floor of the pool.

How Do Pool Contractors Address the Problem?

As constant soil expansion and shrinkage can damage the installation, technicians use different methods to combat the issue before pool construction. For example, one method involves excavating up to 4 feet of the subgrade material and replacing it with a mixture that won't change shape when exposed to water, such as gravel and dirt.

Another common method is installing pier supports that penetrate deep into the ground and anchor into the non-expansive soil layers. Then, they place horizontal beams on top of the piers to stabilize the pool and support its weight. Professionals could also install a monolithic pool floor that uses integral beams to support the weight of the structure. To prevent soil shrinkage that causes the pool to shift or fall deeper into the ground, a contractor might take steps to keep the subgrade wet continuously, such as by allowing water to drain into the area.

If you want to start a pool construction project, contact Inground Pools of Paradise in Hickory Creek, TX. With over 25 years of experience, these contractors prioritize testing your soil to determine the quality and expansion potential of the ground. They also handle regular pool maintenance and repair, as well as pool liner replacement. Visit them online to learn more about their services, and call (469) 464-3610 to discuss your needs with a team member.