Method 1: Cemented support posts decking base To build a decking base on sloped uneven ground: Of Course you need to make sure that any edges are made safe using steps or barriers. The decking is going in front of the french doors on our example but the ground is uneven. Add and compact a 50 mm layer of type 1 MOT hardcore Build the decking frame Pro tip: There is a good chance that the slabs will not be even and that some parts of the decking will be too high or too low.
Screw off-cuts in to add extra support and elevate the decking anywhere it is needed. You now know the basics of the two best methods for laying decking on uneven ground.