If the decking is tight or has too small a gap and the timber gets very wet and swells something has to give. I've seen decking so well attached to joists and bearers that the swelling after much rain combined with very very wet soil has lifted the posts out of the ground as the timber twists and turns to try to move.
I've built 3 decks with cedar - the first two, I left a small gap between the board I built a small jig to space them and align the screws on each board . The third deck I butted them together. The ones with the spaces now have clearly larger gaps from the boards shrinking.
If using 2x8 framing, use 2 screws every 18". If using 2x10 framing use 3 screws every 18". ALWAYS remember to gap fascia properly. NOTE: This does not apply if using standard decking boards for fascia. If using decking as fascia use 3 screws every 12".
How to Build a Deck: Composite Decking and Railings. Start by determining the number of posts you need and the post spacing. You should have posts by the house, at outer corners and at the top of the stairs. The hidden clips set a drainage gap between the boards. Step 1. Starting near the house side of the deck, use screws to secure the
WiseGuides Decking Board Gap Spacers. Creating Perfect Deck Board Gap Spacing. Watch how you can create beautiful, uniform deck board gap spacing with our WiseGuides board spacing tool that works flawlessly with the Hardwood Wrench or any other board straightening tool.
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