Once the formwork is in place, use a level to check that the entire area is even. Any variations in height can be fixed by adding or removing soil. Water the ground slightly and compact it to make a solid base for your concrete. ...
Install subbase. Add 1”-1 ¼ ” gravel for every inch of concrete you plan to install. Tamp down for a solid subbase that will resist settling. Then dampen with a garden hose; this minimizes concrete cracking due to shrinkage. Build forms. Set a stake at each corner of your future ...