Once you order your new shed (or maybe before!), you may wonder whether you should build a gravel pad, set the building on blocks, or maybe place the shed on a concrete pad. of the 5 most popular shed foundations , most people find a block shed foundation to be an inexpensive yet reliable way to set their storage shed or gazebo.. This is the most vital stage in making a base for your gravel shed foundation as you need to dig out a hole in a correct way so that the gravel will stick, and the concrete will dry up quickly.. 6