Knowing when to purchase a new bathtub can be a tough decision. On one hand, you want to make sure that your current bathtub is beyond repair before making the investment in a new one. On the other hand, you don't want to wait too long and risk any further damage or safety concerns such as slippery surfaces. As well, leaks behind walls can do considerable damage and create costly repairs - therefore, here are a few signs that it might be time to consider purchasing a new bathtub.