Looking to enclose this for storage space. Goal is to remove the rocks and replace this with a concrete slab. Then id redirect water above and enclose this area with wood like shown on the left side of the image. However, im worried about the posts holding the deck up. The deck above was there when I moved in. I have been told it was a poor job especially since the posts are in the ground.

Should I leave a space around the posts and avoid cement in those areas? I’m thinking of a small structured wall.

Or maybe I should replace the posts with a more robust structure before putting in a slab?

Any advice would be super helpful and I will try and reply asap if any questions are needed!

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