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How to Build a Brick Wall Building a brick wall takes skill. First, the worker puts mortar on the foundation. Then, they place the first brick. They tap it with the handle of their trowel to make it level. They put mortar on the end of the next brick and put it next to the first. They continue like this. They must check that the wall is straight and level. They use a spirit level for this. It is slow work, but a good brick wall is very strong. CONVERSATION 2: Checking the Work A site super