Spacing Deck Boards
Spacing Deck boards Properly is Critical for Allowing Rain Run-Off
By Mark J. Donovan
Deck boards contract and expand with
variation in temperature and as they age. Consequently when installing deck
boards it is important to properly space deck boards so that water can drain off
of the deck. Typically deck board spacing should be about ¼ inch.
When installing deck boards, start on
the side nearest the house and work your way outwards. As you install each deck
board, it is important to allow for proper spacing between adjacent
If the deck boards are dry, or
manufactured out of composite decking material, place a 16 penny nail between
deck boards as you fasten the deck boards to the deck floor joists. This will
ensure proper deck board spacing to allow for rain water to run off of the deck.
Alternatively there are deck spacers that you can use. Deck spacers are placed
in-between the deck boards and onto the surface of the deck floor joists.
If you are using green pressure
treated deck boards you do not need to space them. Green pressure treated deck
boards will shrink when they dry out thus providing natural deck board spacing
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