I have some severe cracking in my pool deck over the spillway from my spa to pool, I had a guy out today to give me an estimate on replacing the cracked deck (aggregate). He also looked at my pool and said that the pebbletec needs to be replaced, so he is going to give me an estimate on both repairing the cracked deck and replacing the pebbletec. So my question is how long does pebbletec usually last? This pool is about 27 years old and I believe the pebbletec is original.