Expert: Ted Barnhill (Principal, Design45 LLC) - 4/22/2010

Question
THINKING OF BUILDING A PERGOLA IN MY BACK YARD. I HAVE A 10X10 PATIO, BUT WANT THE PERGOLA TO BE 14X10, SO THE POST WILL BE OFF THE PATIO. I PLAN TO INCREASE THE SIXE OF THE PATIO TO 16X10, USING PAVERS.  MY QUESTION, DO I POUR CONCRETE FOR THE POST TO THE HEIGHT OF THE EXISTING PATIO AND PLACE PAVERS AROUND POST OR DO I ONLY POUR CONCRETE TO THE GRAVEL LEVEL OF PAVERS AND PLACE THE SAND & PAVERS OVER THE CONCRETE OF THE POST?

Answer
Erik,

The longest lasting solution is to have your posts above grade, on metal connectors (post bases) which are set into (or fastened into) the concrete footings.  Wood (even if it is treated or cedar/redwood etc.) will last longer if not in contact with soil or concrete.  If you go this route, first get your metal connectors, then plan the concrete pour based on their geometry.  You can trim out the bases over the metal for a more finished look.

On the other hand, some folks set pergola posts directly into gravel or concrete footings.  They will still last a good while if treated, or naturally rot resistant wood species.  In this case, you would hold your concrete down below the level of your pavers for a more finished appearance.

Ted Barnhill
Design 45, LLC