Thermal expansion is a common issue that can cause cracks, warping, and structural damage to stone sculptures over time. To preserve these artworks, several effective methods can be implemented.

1. Temperature Control: Avoid placing stone sculptures in areas with extreme temperature fluctuations, such as direct sunlight or near heating sources. Indoor climate control systems can help maintain stable temperatures.

2. Proper Material Selection: Choose stones with low thermal expansion coefficients, like granite or basalt, for outdoor sculptures. These materials are less prone to damage from temperature changes.

3. Protective Sealants: Apply high-quality sealants to create a barrier against moisture and temperature variations. Reapply sealants periodically to ensure continued protection.

4. Insulation and Shading: Use shading structures or insulating materials to shield sculptures from direct heat. This is especially important for outdoor installations in sunny climates.

5. Regular Maintenance: Inspect sculptures for early signs of stress or cracking. Addressing minor issues promptly can prevent major damage caused by thermal expansion.

By following these methods, artists and conservators can significantly reduce the risk of thermal expansion damage, ensuring the longevity of stone sculptures for future generations.