Rip the sheet of 3/4 inch plywood down to 12-inch (30. 5 cm) wide x 48-inch (1. 2 m) long strips. This will give you 8 bricks per strip, and the entire sheet of plywood will give you a total of 64 bricks. Cut the side forms down to 2 x 4 inches (5. 1 x 10. 2 cm). You will need 2 pieces at 48 inches (1. 2 m) long for each strip. There will be 9 pieces, 9 inches (22. 9 cm) in length.
Lay the strips of plywood on a flat level area and spread plastic sheeting over it to keep the concrete from bonding with the plastic. The work area will need to be left undisturbed for at least 24 hours. Place the assembled side form on top of the . 75-inch (19 cm) plastic covered plywood strip. Either nail the side forms to the plywood or drive wooden stakes around the sides of the forms to keep the forms from shifting off of the plywood bottom strips. You can use screws for easier removal, if desired.
Take care not to stain any concrete bricks.
Begin adding small amounts of water in that small hole, preferably from a bucket rather than a hose for better control of the amount of water that is added at any one time. Mix the dry material and water together with the hoe or shovel, adding water until you have a concrete consistency that is workable. Use a measuring device for the water to ensure each batch has the same consistency. Too wet and it will want to push up the side and run under the forms. Too dry and it will not want to consolidate, but rather it will leave air voids in your concrete brick. If desired, you can or rent a small cement mixer from a hardware or home improvement store.
Tap on the side of the forms with the brick forms filled. Tapping on the top afterward will force any trapped air out from inside of the concrete. Use a straight edge or 12-inch (30. 5 cm) trowel to smooth off the top of the concrete level with the top of the forms. Allow it to dry for 24 hours. If using the brick to face an existing wall, use a scoring trowel to make groves in the brick. This will aid in mortaring the brick in place.
