Proper deck board spacing should have a 1/8-inch gap after the decking has dried out. If you install your decking using wet boards pressure-treated decking that has not yet dried out then you should install them with no gap as a gap will be created as they dry and shrink. Deck spacing isn’t anything to take lightly.
19-06-2009 Ensuring your deck boards are spaced properly will prevent damage and weathering. When spacing deck boards keep these tips in mind. Nails Sixteen penny nails are the best way to establish the amount of space needed between your deck boards. Just place the nail in between the boards to ensure you have enough space.
Wood decking is commonly available in 2x6 and 5/4 x 6 profiles. 5/4 x 6 is produced specifically for decking and is milled with a radius edge or bull nose. 2x6 is thicker and is stronger but is also more expensive. Spacing between deck boards provide a few critical functions. The primary function is to drain water from the deck.