I'm installing pavers under the deck, which has 5.5x5.5 wood posts running into dirt. Should paver blocks contact posts or keep enough gaps? I worry about the moisture and rot of the posts. I guess if the blocks contact the posts, the moisture will be trapped, so rot goes quicker and earlier. If the gap is wide enough, the bottom of posts will be drier. What if I let blocks contact posts and seal the seams? I'm not sure which one is the best solution. Please give me some advice and explanation. Thanks!