What type of surface do you have now? No matter what it is, one that has been abused or damaged needs to be repaired/redone whether it is 1 month or 10 years old. At about 10 years, it is time to start thinking about most surfaces unless they have been very well cared for and were installed/applied properly in the first place.
An honest business man will give you an honest answer, and if it is "Yes, it needs to be redone," then take his word for it. Get some referrals and more than one opinion. It takes some time, but is worth it.
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