If the structure of the deck is still in good shape, I would suggest you replace only the deck boards.
- Replacing the existing deck boards with a composite deck board would reduce the maintenance and prevent future splinters.
- When installing composite decks I would recommend adding blocking to the the deck joists if the spacing is more than 12" on center.
We have found that this gives our clients the most desirable finished look.
For more information:
Read "What are the best green alternatives to wood for decking?" a Q&A answered by Marian Keeler.