Considering all the parts of your pool, the plastering is one of the most critical aspects that requires constant attention. When exposed to drastic changes in temperature, plaster can begin to crack. This is true even with the most expensive water-resistant coating as all types of plasters have a lifespan. Although you may not mind a few cracks in your pool, remember that these cracks are an indication of something serious happening underneath. When cracks start to appear, the concrete underneath is vulnerable, which means the integrity of your pool is compromised.