wrote in message
oups.com...
Our pressure treated deck is 36 feet by 12 feet with the boards running
in the long direction (parallel to the house). The previous owner
ruined the boards so I want to replace them.

It occurs to me that I could put 12 foot boards over top of the
existing decking and have a seamless deck with the boards running in
the short direction (perpendicular to the house). I'd leave gaps
between the boards for drainage. I could even remove some (1/2, 1/3) of
the old boards to improve drainage if necessary.

The deck will be a bit higher but it is already a step down from the
house so that won't be a problem.

Is this done? Are their hidden problems waiting to bite me if I install
new 5/4 x 6 boards on top of and perpendicular to old ones?

Where the new boards sit on the old, water will wick in and stay, promoting
rot.

Bob