Thank you for getting in touch! To be sure the deck will last it would be best to replace it but I understand that can be a large undertaking. It is hard to recommend any specific actions because we can’t see the deck in person. I would suggest talking to a few local installers, more than just one or two, to really get a good idea of what the best action would be. Sorry we couldn’t be of more help! Please let us know if you have any other questions!