Step 6

Mix the concrete according to package directions and, using the trowel, remove the bricks and spread a bed of concrete for the first layer to stick to the foundation. Push the concrete into the spaces between the bricks. Frequently check the level of the bricks. Tap the bricks to level them. Repeat this step for all the bricks in the U shape until the desired height is reached. As you work, clean off any excess concrete at this time to keep the excess from drying on the outside of the pit. Allow to dry overnight.