The answer to 'bathtub replacement frequency' is that most bathtubs should be replaced every 10-15 years on average. Bathtubs are subject to a lot of wear and tear from daily use, and over time the materials can become cracked, chipped, or worn down. Proper maintenance and care can help extend the lifespan, but eventually the bathtub will need to be replaced for both aesthetic and functional reasons.
The exact replacement timeline can vary depending on factors like the quality of the original bathtub, how heavily it's used, and any damage or issues that arise. Homeowners should inspect their bathtub regularly and consider replacing it if they notice significant wear, cracks, or other problems that impact its performance and appearance.