Can an inground pool in the basement of a building be left empty for months possibly year without any damage from pressure ground water?

Leaving an inground pool in the basement empty for months or even years without proper measures in place can indeed lead to damage from pressure ground water. Here's why:

1. Hydrostatic Pressure:

When a pool is filled with water, the water inside exerts a hydrostatic force on the pool walls and floor, balancing out the pressure from the surrounding soil and groundwater. This helps maintain structural stability. However, when the pool is empty, the hydrostatic pressure from the outside water, including groundwater, remains, pushing inward against the pool structure.

2. Cracking and Structural damage:

The sustained pressure from the surrounding soil and groundwater can cause cracks in the pool walls and floor, impacting the structural integrity of the entire basement. Cracks in the pool structure can lead to leaks and further issues, eventually compromising the basement's foundation.

3. Flooding and Water damage:

Cracks or leaks in the pool structure allow groundwater and rainwater to seep into the basement, causing flooding and water damage. The water can saturate basement carpets, damage furniture and belongings, and compromise the overall integrity of the basement living space.

4. Mold and Mildew growth:

The presence of moisture in a confined space like the basement creates ideal conditions for mold and mildew growth. Mold can cause respiratory problems, allergies, and deteriorate building materials.

5. Corrosion and Rust:

The prolonged exposure of the empty pool to moisture can also cause corrosion and rust on metal components, including ladders, handrails, and plumbing systems.

To mitigate these risks, several steps can be taken:

1. Proper Drainage System: Ensure the basement has a functional drainage system in place to manage groundwater and rainwater effectively.

2. Pool Sump Pump: Install a sump pump specifically for the pool area to remove excess water and relieve hydrostatic pressure.

3. Sealing Cracks and Leaks: Regularly inspect the pool for cracks and leaks and seal them promptly to prevent water intrusion.

4. Dehumidifier: Use a dehumidifier in the basement to control moisture levels and inhibit mold growth.

5. Consult Professionals: If leaving the pool empty for an extended period, consult structural engineers or pool experts who can assess the risks and recommend precautions.

In conclusion, leaving an inground pool in the basement empty for months or years without proper precautions can lead to significant structural damage, flooding, mold issues, and corrosion. Taking necessary measures to manage hydrostatic pressure and moisture control is essential to protect the integrity of your basement and ensure its long-term habitability.