Ideally you want to have enough space so that a womans high heel won't get caught but large enough for water to drain without collecting mid sized particulates.
If the PT decking is over 19% moisture content or feels very heavy for it's size it may be laden with moisture. If this is the case use a typical 16d common nail as your spacer... 1/8 ... as the deck dries it will widen the space to 3/16.
If the decking comes KD (kiln dried), has been sitting in the sun or feels light for it's size & you are installing in the summer heat, use upwards of a 1/4 inch spacer. These then will collect moisture in the cellular structure and close the gap to the 1/8 - 3/16.
http://www.altereagle.com/
http://decks-ca.com
http://kingofcrown.com
Alter Eagle Construction & Design |
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