Which exterior plywood to use?

Hi all,

I need to square up some round patio pillars. Basically just box them in the entire height up to the eves. The pillar diameter is approximately 200 mm. Then I plan to tile them. The pillars are under the eves but are exposed to the weather. The lower part of the pillars get wet every time it rains. I was looking at 18 mm plywood to use as boxing as it suits future plans to enclose the patio. My question is which plywood to use? Marine,Film face, exterior? I obviously need something that's stable under moisture but can be tiled over. Any thoughts?


Cheers, Brad.


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