How does the thermal expansion of PVC affect joint integrity in multi-part outdoor sculptures?

The thermal expansion of PVC (polyvinyl chloride) can significantly impact the joint integrity of multi-part outdoor sculptures. PVC expands and contracts with temperature fluctuations, which may cause stress at connection points, leading to cracks, loosening, or even structural failure over time.

In outdoor environments, where temperatures vary widely, PVC sculptures are particularly vulnerable. Without proper design considerations—such as expansion gaps, flexible adhesives, or reinforced joints—thermal cycling can weaken the sculpture’s stability.

To mitigate these effects, artists and engineers often use techniques like overlapping joints, elastic sealants, or modular designs that accommodate movement. Understanding PVC’s thermal behavior ensures long-lasting, resilient outdoor art installations.