We want to raise a shed off of the ground should we use blocks or treated lumber?

Question

We have a solid shed that we built 5 years ago. The shed has "sunk" and is now leval with the ground. We plan to raise the shed so that is not touching the ground. When we built the shed we placed 3 treated 2x4's across the bottom (12 feet long). Any suggestions on what to place under the shed? Should we put blocks (6x8x1.5 inches) or should we go with treated timber (2x4)? The shed is 10x12 feet if we use blocks how many do you think? My husband and I are really debating this and just want another opinion. Thank you!!!

Answer 1

either one will do if block place on all four corners and middle but that will leave a gap where small animals can crawl under shed the two by fours will run under the entire shed

Answer 2

wood rots after awhile.

nuff said.