I would like to pour a concrete patio under my deck. The concrete company said they would just pour the concrete around the posts with a expansion joint around the posts. I thought that would cause water build up around the posts since the concrete would be on top of the existing footing and not allowing the water to escape. Also, the existing footings are uneven, with greatest difference being close to 4", so I can't just pour the concrete to the top of the footings. See the attached picture. Any suggestions?
Support either side of each post, cut it off, insert a steel stub base or pour a new concrete base to a height slightly above the planned slab, pour the new slab.
Or, just make sure the "expansion joint" around each post is actually around each footing, boxing out the whole area, and fill with pea stone or marble chips after pouring the slab.
Or skip pouring a slab and just put in a base for pavers and build the patio from pavers.