How to Build a Concrete Block Wall
Step 7: Lay Remaining Blocks in First Row
Lay the remaining concrete blocks in the bottom row by buttering one end of each block, and positioning it next to the adjoining block. Press each block down into the mortar bed and against the previously laid block so all mortar joints are 3/8” wide.
Adjust each block so it’s flush and level. Continue this process until the first course is complete.