Yes, 2"x8" and 2"x10" support boards are fine to use with the Floating Foundation Deck System. However, using 2"x8" or 2"x10" support boards DOES NOT reduce the number of Dek-Block® piers required for each support board, or the spacing between support boards. The minimum number of Dek-Block® piers is based on the distribution of weight on the ground which does not change by the thickness of the support board.