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Old 05-01-2010, 07:41 AM   #1
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Diagonal Deck Boards

I have an existing deck with joists (2x8's) 16" O.C.
I want to replace my deck boards (5/4 x 6's) and lay them diagonal.
I have heard a lot about needing the joists 12" O.C.
Any advice out there?


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Old 05-01-2010, 07:45 AM   #2
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will be springy better to use 2x on diagonal


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Old 05-01-2010, 06:31 PM   #3
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5/4 is going to be springy with 16"OC for the framing; because the decking is essentialy now almost 17 inches between supports, as compared to 14 1/2" for the perpendicular run. Besides the extra springyness, the boards tend to create humps and dips betwen the joists when the water/sun starts to work on them.

It is done, but I would suggest temorarily laying a few boards and seeing how they feel to you when you walk on them. You are not going to break the board with normal residential usage, just the "feeling" may be a bit bouncy for you.

Last edited by troubleseeker; 05-01-2010 at 06:37 PM.
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Old 05-01-2010, 10:02 PM   #4
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With 17" diagonal at 12" on center, it stretches to 22-5/8" at 16" on center........

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